💥💥💥 How to draw and calculate centrifugal pump in Ansys Fluent?

A centrifugal pump is a device that uses the rotation of an impeller to increase the pressure and flow rate of a fluid. Ansys Fluent is a software that can simulate the fluid dynamics and performance of a centrifugal pump using various methods and models¹.

To draw and calculate a centrifugal pump in Ansys Fluent, you will need to follow these general steps:

• Create or import the geometry of the pump, including the inlet, outlet, and impeller regions. You can use Ansys DesignModeler, Ansys SpaceClaim, or any other CAD software to create the geometry²³.
• Mesh the geometry using Ansys Meshing or Ansys TurboGrid. You can choose different meshing methods and parameters depending on the complexity and accuracy of the simulation²³.
• Set up the physics and boundary conditions of the simulation in Ansys Fluent. You can choose different models and methods to simulate the fluid flow, such as laminar or turbulent, steady or transient, single-phase or multiphase, etc. You can also specify the operating pressure, inlet and outlet conditions, and the rotation speed of the impeller²³.
• Solve the simulation and monitor the convergence and results. You can use different solvers and algorithms to solve the governing equations of the fluid flow, such as pressure-based or density-based, segregated or coupled, etc. You can also use different techniques to accelerate the convergence, such as pseudo-transient, under-relaxation, or multigrid²³.
• Post-process the results and analyze the performance of the pump. You can use Ansys Fluent or Ansys CFD-Post to visualize and quantify the results, such as pressure, velocity, mass flow rate, head, efficiency, torque, etc. You can also compare the results with experimental data or other simulations²³.

For more details and examples, you can watch this video tutorial¹ or refer to this forum post² or this online discussion⁴. 

How to draw (general rulez) centrifugal pump?

A centrifugal pump consists of a casing, an impeller, and a shaft. The casing is the outer part that encloses the fluid and directs it to the outlet. The impeller is the rotating part that transfers energy to the fluid and increases its pressure and velocity. The shaft is the part that connects the impeller to the motor and transmits the torque.

To draw the geometry of a centrifugal pump, you need to follow these steps:

• Draw a circle with the diameter of the inlet of the pump. This will be the base of the casing.
• Draw a spiral curve that starts from the inlet circle and ends at the outlet of the pump. This will be the shape of the casing. The spiral curve should have a constant pitch and a variable radius that increases with the angle. The pitch and the radius depend on the design specifications of the pump.
• Draw another circle with the diameter of the outlet of the pump. This will be the top of the casing.
• Extrude the spiral curve between the inlet and outlet circles to create the casing volume. You can use the coil tool with the spiral option to do this easily¹.
• Draw a circle with the diameter of the impeller inside the casing. This will be the base of the impeller.
• Draw a series of blades on the impeller circle. The blades should have a curved shape that follows the direction of the fluid flow. The number, shape, and angle of the blades depend on the design specifications of the pump.
• Extrude the blades along the impeller circle to create the impeller volume. You can use the sweep tool to do this easily².
• Draw a cylinder with the diameter of the shaft inside the impeller. This will be the base of the shaft.
• Extrude the shaft cylinder to the desired length. You can use the extrude tool to do this easily².

You have now drawn the geometry of a centrifugal pump. You can use any CAD software to do this, such as Ansys DesignModeler, Ansys SpaceClaim, or Inventor³. 

What are some common errors when modeling a centrifugal pump in Ansys Fluent?

Some common errors when modeling a centrifugal pump in Ansys Fluent are:

• Non-converging simulations: This means that the solver cannot find a solution that satisfies the governing equations of the problem. Possible causes include incorrect boundary conditions, poor quality mesh, inaccurate physical models, or numerical instabilities¹².
• Diverging simulations: This means that the solution becomes unstable and grows without bounds. Possible causes include incorrect boundary conditions, poor quality mesh, or numerical instabilities².
• Unphysical results: This means that the results from the simulation seem unrealistic or unphysical. Possible causes include incorrect boundary conditions, poor quality mesh, or inaccurate physical models².

To troubleshoot these errors, you can check your boundary conditions, refine your mesh, use appropriate physical models, and try different solver settings¹². 

What are some best practices for modeling pumps in Ansys Fluent?

Some best practices for modeling pumps in Ansys Fluent are:

• Use the watertight geometry workflow to create a clean and robust geometry of the pump¹.
• Use the mosaic poly-hexcore meshing with parallel scalability to generate a high-quality and efficient mesh of the fluid domain¹.
• Use inflation layers to capture the boundary layer effects near the walls of the pump¹.
• Use the sliding mesh method to model the rotation of the impeller and the interaction with the stationary parts of the pump²³.
• Use appropriate physical models and boundary conditions to simulate the fluid flow, such as laminar or turbulent, steady or transient, single-phase or multiphase, etc²³.
• Use different solvers and algorithms to solve the governing equations of the fluid flow, such as pressure-based or density-based, segregated or coupled, etc²³.
• Use different techniques to accelerate the convergence, such as pseudo-transient, under-relaxation, or multigrid²³.
• Use Ansys Fluent or Ansys CFD-Post to visualize and quantify the results, such as pressure, velocity, mass flow rate, head, efficiency, torque, etc²³.
• Compare the results with experimental data or other simulations to validate the accuracy and reliability of the simulation²³.

For more details and examples, you can watch this video tutorial³ . 

What are common mistakes in centrifugal pump design?

Some common mistakes in centrifugal pump design are:

• Choosing the wrong type of pump for the application. Different types of centrifugal pumps, such as radial or axial, have different characteristics and performance curves. Choosing the wrong type of pump can lead to inefficiency, cavitation, or failure¹².
• Using incorrect or inaccurate design parameters. The design of a centrifugal pump depends on various parameters, such as flow rate, head, specific speed, impeller diameter, blade number, blade angle, etc. Using incorrect or inaccurate values for these parameters can result in poor performance, excessive power consumption, or instability¹².
• Ignoring the effects of fluid properties and operating conditions. The fluid properties, such as density, viscosity, compressibility, and multiphase behavior, can affect the flow and performance of a centrifugal pump. The operating conditions, such as temperature, pressure, and suction, can also influence the pump behavior. Ignoring these effects can lead to errors in the design and simulation of the pump¹².
• Neglecting the rotor-stator interaction and the secondary flow. The rotor-stator interaction is the phenomenon of fluid flow between the rotating impeller and the stationary casing or diffuser. The secondary flow is the phenomenon of fluid flow in the radial or tangential direction due to the centrifugal force and the pressure gradient. These phenomena can cause losses, noise, vibration, or instability in the pump¹³.
• Not validating the design and simulation results with experimental data or other simulations. The design and simulation of a centrifugal pump are based on assumptions, simplifications, and models that may not capture the reality of the pump. Therefore, it is important to validate the results with experimental data or other simulations to ensure the accuracy and reliability of the design¹².

📚 📚 📚 The story of Thor who wanted to optimize his hammer in Ansys Structural

 Thor, the mighty god of thunder, was not satisfied with his hammer, Mjolnir. He wanted to make it even more powerful and durable, so he decided to use Ansys Structural, a software that can simulate and optimize the performance of different materials and structures.

He downloaded the software from the internet and installed it on his laptop. He then scanned his hammer with a 3D scanner and imported the model into Ansys. He set up the parameters and boundary conditions, such as the force, temperature, and pressure that his hammer would experience in battle.

He ran the simulation and waited for the results. He expected to see some suggestions on how to improve his hammer, such as changing the shape, size, or material. However, he was shocked and angry when he saw the message on the screen:

"ERROR: The hammer is too heavy for the software to handle. Please reduce the mass or use a simpler model."

Thor was furious. He thought that the software was mocking him and his hammer. He grabbed his laptop and threw it across the room, smashing it into pieces. He then picked up his hammer and yelled:

"This is the best hammer in the universe! No software can tell me otherwise! I don't need any optimization! I am Thor, the strongest and the greatest!"

He stormed out of the room, leaving behind a mess of broken electronics and wires. He vowed never to use Ansys Structural again, and to stick to his trusty hammer, Mjolnir.

Meanwhile, Loki, the god of mischief, was watching Thor's tantrum from a hidden camera. He was the one who had hacked into Thor's laptop and made the software give him the error message. He was amused by Thor's reaction and decided to prank him even more.

He hacked into the 3D scanner and modified the model of Thor's hammer. He made it look like a toy hammer, with bright colors and squeaky sounds. He then uploaded the model to a website that could print 3D objects and ordered a copy of the fake hammer.

He waited for the delivery and then sneaked into Thor's room. He replaced Thor's hammer with the fake one and hid the real one under his bed. He then left a note on Thor's desk, saying:

"Dear Thor, I have optimized your hammer for you. You're welcome. Love, Ansys."

He then ran away, laughing evilly.

The next day, Thor woke up and saw the note. He was curious and picked up the hammer. He was shocked to see that it looked nothing like his hammer. It was small, light, and colorful. He tried to swing it, but it made a squeaky noise. He was furious and confused.

He thought that Ansys had somehow changed his hammer and ruined it. He wanted to get his revenge. He searched for the address of Ansys and found out that it was in Pennsylvania, USA. He decided to fly there and confront them.

He grabbed his fake hammer and flew out of the window, leaving behind a trail of thunder and lightning. He did not notice that Loki was watching him from a distance, smiling wickedly.

Thor arrived at Ansys headquarters in Canonsburg, Pennsylvania. He was angry and impatient. He did not care about the security guards or the receptionist. He barged into the building, holding his fake hammer.

He shouted:

"Where is Ansys? I want to speak to Ansys! You have ruined my hammer! You will pay for this!"

The people in the building were terrified and confused. They did not know who Thor was or what he was talking about. They tried to calm him down and explain that Ansys was not a person, but a company that made software.

But Thor did not listen. He thought that they were lying and hiding Ansys from him. He started to smash everything in his sight with his fake hammer. He broke the windows, the computers, the desks, and the walls. He made a huge mess and caused a lot of damage.

He did not notice that his fake hammer was also breaking apart. The plastic and rubber parts were falling off, revealing the metal core inside. The squeaky noise was getting louder and more annoying.

He finally reached the office of the CEO of Ansys, Ajei Gopal. He kicked the door open and saw a man sitting behind a desk. He assumed that he was Ansys. He pointed his fake hammer at him and said:

"Are you Ansys? You have messed with the wrong god! You have no idea what you have done! You have turned my hammer, Mjolnir, into this pathetic toy! How dare you!"

Ajei Gopal was shocked and scared. He did not recognize Thor or his hammer. He thought that he was a crazy man who had escaped from a mental hospital. He tried to reason with him and said:

"Please, calm down. I don't know who you are or what you are talking about. I am not Ansys. I am Ajei Gopal, the CEO of Ansys. We make software for engineering and simulation. We have nothing to do with your hammer."

But Thor did not believe him. He thought that he was lying and trying to trick him. He raised his fake hammer and said:

"Don't lie to me! You are Ansys! You are the one who sent me this note! You are the one who changed my hammer! Admit it!"

He showed him the note that Loki had left on his desk. It said:

"Dear Thor, I have optimized your hammer for you. You're welcome. Love, Ansys."

Ajei Gopal looked at the note and realized that it was a prank. He recognized the handwriting and the signature. It was his brother, Loki Gopal, who worked as a software engineer at Ansys. He was known for his mischief and pranks. He often hacked into the software and changed the results or the messages. He had done it before to his colleagues and his clients. He had even done it to him.

Ajei Gopal understood that his brother had pranked Thor and made him think that Ansys had ruined his hammer. He felt sorry for Thor and angry at Loki. He said:

"Oh, no. This is a prank. This is not from Ansys. This is from my brother, Loki. He works here as a software engineer. He likes to hack into the software and play jokes on people. He must have hacked into your laptop and your 3D scanner and changed your hammer. He also wrote this note. He is very clever and very naughty. He is the god of mischief."

Thor was stunned and confused. He did not expect this twist. He said:

"Your brother is Loki? The god of mischief? That is impossible. My brother is Loki. The god of mischief. He is the one who gave me this laptop and this 3D scanner. He said that they were gifts from Ansys. He said that Ansys could optimize my hammer. He lied to me. He tricked me. He is very clever and very naughty. He is the god of mischief."

Ajei Gopal was also stunned and confused. He said:

"Your brother is Loki? The god of mischief? That is impossible. My brother is Loki. The software engineer. He is the one who works here at Ansys. He is the one who hacked into your laptop and your 3D scanner. He is the one who wrote this note. He lied to you. He tricked you. He is very clever and very naughty. He is the software engineer."

They looked at each other and realized that they were talking about the same person. Loki had somehow disguised himself as a software engineer and a god. He had somehow fooled them both. He had somehow pulled off the ultimate prank.

They said in unison:

"LOKI!"

They heard a loud laughter from outside the window. They turned and saw Loki standing on the roof of the building. He was holding Thor's real hammer, Mjolnir. He waved at them and said:

"Hello, brothers. Did you like my prank? I hope you enjoyed it. I certainly did. It was so much fun. You should have seen your faces. Priceless. Don't be mad. It was just a joke. A harmless joke. Well, maybe not so harmless. But still, a joke. A brilliant joke. A masterpiece of mischief. A work of art. A legend. A legend of Loki. The god of mischief. And the software engineer. The best of both worlds. The ultimate prankster. The one and only. Loki. That's me. Loki. Bye."

He then threw Mjolnir into the air and caught it. He spun it around and created a portal. He jumped into the portal and disappeared, leaving behind a trail of sparks and smoke.

Thor and Ajei Gopal were speechless and furious. They wanted to chase after Loki and get their revenge. But they knew that it was too late. Loki was gone. He had escaped. He had won.

They looked at each other and sighed. They had no choice but to accept their defeat and clean up the mess. They apologized to each other and shook hands. They agreed to work together to fix the damage and find the fake hammer. They also agreed to never trust Loki again.

They learned their lesson. They learned that Loki was not only the god of mischief, but also the software engineer of mischief. They learned that Loki was the master of pranks. They learned that Loki was the legend of Loki.

💥💥💥 How to model pressure drop in Ansys Fluent?

Pressure drop is the difference in pressure between two points in a fluid flow. It is caused by friction, turbulence, bends, valves, fittings, or other obstacles in the flow path. Pressure drop can affect the performance, efficiency, and safety of fluid systems, such as pipes, ducts, pumps, compressors, turbines, heat exchangers, etc.

There are different ways to calculate pressure drop in Ansys Fluent, depending on the type of flow, the boundary conditions, and the model assumptions. Some of the common methods are:

• Using the Darcy-Weisbach equation, which relates the pressure drop to the friction factor, the density, the velocity, the length, and the diameter of the pipe. This equation is valid for laminar and turbulent flows in smooth and rough pipes. You can use the Moody chart or the Colebrook equation to find the friction factor for a given Reynolds number and relative roughness. You can also use the Swamee-Jain equation or the Haaland equation to estimate the friction factor more easily. For more details, please see this video.
• Using the Bernoulli equation, which relates the pressure drop to the change in kinetic and potential energy of the fluid. This equation is valid for inviscid, incompressible, and steady flows along a streamline. You can use the Euler equation to extend the Bernoulli equation to rotational flows. You can also use the energy equation to account for the heat transfer and viscous dissipation in the flow. For more details, please see this guide.
• Using the porous media model, which relates the pressure drop to the permeability and the inertial resistance of the porous medium. This model is valid for flows in porous materials, such as filters, catalysts, packed beds, etc. You can use the Ergun equation or the Forchheimer equation to find the permeability and the inertial resistance coefficients for a given porosity and particle diameter. You can also use the core porosity model to define the pressure drop parameters and the effectiveness of a heat exchanger zone. For more details, please see this guide.
• Using the user-defined function (UDF), which allows you to write your own code to specify the pressure drop function based on your own criteria. This method is useful for cases where the existing models are not suitable or accurate enough for your simulation. You can use the DEFINE_PRESSURE_DROP macro to define the pressure drop across a boundary or an interface. You can also use the DEFINE_PROFILE macro to define the pressure drop as a function of the spatial coordinates. For more details, please see this forum post.

How to define flow resistance (pressure drop) at outlet in Ansys Fluent?

One way to define flow resistance at an outlet in Ansys Fluent is to use the outlet vent boundary condition. This boundary condition allows you to specify a loss coefficient that represents the pressure drop across the vent. The pressure drop is calculated as follows¹:

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Another way to define flow resistance at an outlet in Ansys Fluent is to use a user-defined function (UDF). This allows you to write your own code to specify the outlet boundary condition based on your own criteria. For example, you can use a UDF to define a pressure outlet boundary condition with a variable pressure drop that depends on the flow rate or the Reynolds number. You can find some examples of UDFs for outlet boundary conditions in this forum post and this forum post.

Is there possibilty to define pressure drop on contact between two domains in Ansys Fluent ?

Yes, there is a possibility to define pressure drop on contact between two domains in Ansys Fluent. One way to do this is to use the interface boundary condition and specify the jump option. This option allows you to define a pressure jump or a loss coefficient across the interface between two domains. You can also use a user-defined function (UDF) to define a custom pressure drop function across the interface. For more details, please refer to this guide or this forum post.

How to calculate  a loss coefficient, where fluid density is 1.2 kg/m3 , pressure drop is 40000 Pa and velocity is 20 m/s

💥💥💥 How to define free inlet and outlet in Ansys Fluent?

 A free inlet is a type of boundary condition that allows the fluid to enter or exit the domain depending on the pressure difference. It is suitable for external or unconfined flows, such as wind tunnel simulations or open channel flows.

To define a free inlet in Ansys Fluent, you can use the pressure inlet boundary condition and set the total (stagnation) pressure to zero. This will allow the fluid to flow in or out of the domain depending on the local pressure gradient. You will also need to specify the total temperature, turbulence parameters, and other scalar properties of the flow at the inlet. For more details, please refer to this guide.

Alternatively, you can use the velocity inlet boundary condition and set the velocity magnitude to zero. This will also allow the fluid to flow in or out of the domain depending on the pressure difference. However, you will need to use a user-defined function (UDF) to update the velocity direction at each time step, based on the local flow direction. For more information, please see this forum post.

How to define free outlet in Ansys Fluent?

A free outlet is a type of boundary condition that allows the fluid to exit the domain freely without any restriction. It is suitable for external or unconfined flows, such as jet flows or exhaust flows.

To define a free outlet in Ansys Fluent, you can use the pressure outlet boundary condition and set the gauge pressure to zero. This will allow the fluid to flow out of the domain based on the local pressure gradient. You will also need to specify the backflow properties of the flow at the outlet, such as temperature, turbulence parameters, and other scalar quantities. For more details, please refer to this guide.

Alternatively, you can use the outflow boundary condition and set the mass flow rate to zero. This will also allow the fluid to flow out of the domain without any restriction. However, you will need to ensure that there is no reverse flow at the outlet, as the outflow boundary condition does not account for backflow. For more information, please see this forum post.

What is the difference between pressure outlet and outflow?

The difference between pressure outlet and outflow boundary conditions in Ansys Fluent is that:

• Pressure outlet allows you to specify the static (gauge) pressure at the outlet, and the software will calculate the mass flow rate based on the pressure gradient. You also need to define the backflow properties in case of reverse flow at the outlet. This boundary condition is suitable for cases where the outlet pressure is known or important for the simulation results.
• Outflow assumes a zero diffusion flux for all flow variables except the pressure, and the software will calculate the pressure at the outlet based on the mass conservation. You do not need to define the backflow properties, but you need to ensure that there is no reverse flow at the outlet. This boundary condition is suitable for cases where the flow is fully developed and the outlet pressure is not known or important for the simulation results.

For more information, please refer to this guide or this forum post.

What is the difference between pressure inlet and velocity inlet?

The difference between pressure inlet and velocity inlet boundary conditions in Ansys Fluent is that:

• Pressure inlet allows you to specify the total (stagnation) pressure at the inlet, and the software will calculate the mass flow rate based on the pressure gradient. You also need to define the backflow properties in case of reverse flow at the inlet. This boundary condition is suitable for cases where the inlet pressure is known or important for the simulation results¹.
• Velocity inlet allows you to specify the velocity magnitude and direction at the inlet, and the software will calculate the total pressure based on the mass conservation. You do not need to define the backflow properties, but you need to ensure that there is no reverse flow at the inlet. This boundary condition is suitable for cases where the inlet velocity is known or important for the simulation results².

For more information, please refer to this guide or this forum post.

💥💥💥 What is Helyx-OS and what is used for ?

Helyx-OS is an open-source graphical user interface (GUI) for OpenFOAM, a free and open-source computational fluid dynamics (CFD) software¹. It allows users to perform pre-processing tasks such as meshing, case definition and solver execution. It supports both OpenFOAM and OpenFOAM+, and works on Linux and Windows platforms².

Helyx-OS is designed to facilitate the usage of the standard OpenFOAM libraries, by removing the complexity of text based case definition in favour of an intuitive easy-to-use graphical user interface. It is intended for academic use and entry-level CFD work¹. If you are looking for an enterprise CFD solution for industrial applications, you can check out HELYX, a more advanced CFD software product developed by ENGYS³.

Is Helyx-os completely free?

Yes, Helyx-OS is completely free for academic use and entry-level CFD work. It is released to the public under the GNU General Public License¹. However, if you are looking for an enterprise CFD solution for industrial applications, or if you require technical support and/or training for Helyx-OS and OpenFOAM, you may need to pay for those services². You can contact ENGYS, the developer of Helyx-OS, for more information³.

Can I use Helyx-OS for commercial purposes?

According to the developer of Helyx-OS, ENGYS, the software is intended for academic use and entry-level CFD work, and it is delivered to the public under the GNU General Public License¹. This means that you can use Helyx-OS for commercial purposes, as long as you comply with the terms and conditions of the license². However, you may not receive any technical support or documentation from ENGYS, unless you pay for those services¹. If you are looking for an enterprise CFD solution for industrial applications, you may want to consider HELYX, a more advanced CFD software product developed by ENGYS³. HELYX is not free, but it offers more features, reliability and support than Helyx-OS².

What is difference between Helyx-os  and HELYX ?

The main difference between Helyx-OS and HELYX is that Helyx-OS is an open-source graphical user interface (GUI) for OpenFOAM, a free and open-source computational fluid dynamics (CFD) software, while HELYX is a comprehensive general purpose CFD software package for engineering analysis and design optimisation of enterprise applications, based on ENGYS’ own open-source CFD simulation engine¹².

Helyx-OS is intended for academic use and entry-level CFD work, and it is delivered to the public under the GNU General Public License. It supports both OpenFOAM and OpenFOAM+, and works on Linux and Windows platforms. It allows users to perform pre-processing tasks such as meshing, case definition and solver execution. It does not provide any technical support or documentation from ENGYS, unless users pay for those services¹³.

HELYX is a unified, off-the-shelf CFD software product compatible with most Linux and Windows platforms, including high-performance computing systems. It features an advanced hex-dominant automatic mesh algorithm with polyhedra support, a wide range of physical models, and a Generalised Internal Boundaries method to support complex boundary motions. It also incorporates an extensive set of ancillary services to facilitate the deployment and usage of the software in any working environment. It offers more features, reliability and support than Helyx-OS, but it is not free²⁴.

Can I modify Helyx-OS for my own purposes?

Yes, you can modify Helyx-OS for your own purposes, as long as you comply with the terms and conditions of the GNU General Public License¹. Helyx-OS is an open-source graphical user interface (GUI) for OpenFOAM, a free and open-source computational fluid dynamics (CFD) software². The source code of Helyx-OS is available on GitHub³, where you can also find instructions on how to compile it on your own⁴. However, if you modify Helyx-OS, you may not receive any technical support or documentation from ENGYS, the developer of Helyx-OS, unless you pay for those services². You may also want to check out the FAQ page of Helyx-OS for more information.

What is difference in functionaity between Helyx-os and HELYX for CFD simulations ?

The difference in functionality between Helyx-OS and HELYX for CFD simulations is mainly related to the following aspects:

• Meshing: Helyx-OS uses SnappyHexMesh, an automatic mesh generator for complex geometries based on hexahedral cells¹. HELYX uses an advanced hex-dominant automatic mesh algorithm with polyhedra support, which can run in parallel and generate large computational grids².
• Solvers: Helyx-OS supports a subset of solvers and boundary conditions available in OpenFOAM, a free and open-source CFD software¹. HELYX supports a wide range of physical models, such as single- and multi-phase turbulent flows, thermal flows, radiation, compressible and incompressible flows, etc. It also incorporates a Generalised Internal Boundaries method to handle complex boundary motions².
• GUI: Helyx-OS provides a graphical user interface (GUI) for pre-processing tasks such as meshing, case definition and solver execution. It also allows users to monitor the simulation progress and visualize the results¹. HELYX provides a more comprehensive and user-friendly GUI, with client-server support for remote and cloud-based operation. It also offers more features and options for case setup, simulation control and post-processing².
• Support: Helyx-OS is delivered to the public under the GNU General Public License, and does not provide any technical support or documentation from ENGYS, the developer of Helyx-OS, unless users pay for those services¹. HELYX is a commercial product, and provides first-class user support, code maintenance and documentation from ENGYS².

In summary, Helyx-OS is a free and open-source GUI for OpenFOAM, intended for academic use and entry-level CFD work. HELYX is a comprehensive and cost-effective CFD software package for engineering analysis and design optimisation of enterprise applications, based on ENGYS’ own open-source CFD simulation engine.

📚 📚 📚 A story about a Smurf who wanted to optimize his hat in Ansys (drag force) to run faster while escaping from Gargamel

 Smurf was always fascinated by Ansys, the software that could simulate anything from bridges to rockets. He wanted to use it to improve his own life, and he had a brilliant idea: he would optimize his hat to make it more aerodynamic.

He borrowed a laptop from Handy Smurf and installed Ansys on it. He scanned his hat with a 3D scanner and imported the model into Ansys. He set up the boundary conditions and the mesh, and ran the simulation.

He was shocked by the results. His hat had a very high drag coefficient, which meant that it slowed him down a lot when he ran. He decided to try different shapes and sizes for his hat, and see which one had the lowest drag.

He spent hours tweaking his hat model, running simulations, and comparing results. He tried hats that were longer, shorter, wider, narrower, curved, flat, pointed, round, and everything in between. He even tried hats that looked like wings, cones, and propellers.

He finally found the optimal shape for his hat. It was a sleek, streamlined, bullet-shaped hat that had the lowest drag coefficient he had ever seen. He was overjoyed. He printed the hat with a 3D printer and put it on his head. He felt a surge of confidence and excitement. He was ready to test his hat in the real world.

He ran outside and joined the other Smurfs who were playing in the meadow. He challenged them to a race. He was sure that he would win with his new hat. He lined up with the other Smurfs and waited for the signal.

Papa Smurf blew the whistle and the race began. Smurf sprinted ahead of the others, feeling the wind in his face and his hat cutting through the air. He was amazed by how fast he was going. He looked back and saw that he had left the other Smurfs far behind. He smiled and waved at them.

He was about to cross the finish line when he heard a loud roar. He turned his head and saw Gargamel, the evil wizard who hated the Smurfs and wanted to capture them. Gargamel had spotted Smurf and his shiny new hat, and was chasing him with a net.

Smurf panicked and tried to run faster, but it was too late. Gargamel was faster and stronger, and he caught up with Smurf. He swung his net and caught Smurf and his hat.

"Gotcha, you little blue pest!" Gargamel shouted. "And what is this? A new hat? How cute! It looks like a bullet! Well, it won't help you escape from me!"

He laughed maniacally and put Smurf and his hat in a cage. He carried the cage to his castle, where he planned to use Smurf and his hat for his experiments.

Smurf realized that his hat had not only failed to help him, but had also caused his capture. He regretted ever using Ansys and wished he had kept his old hat. He hoped that the other Smurfs would come and rescue him soon.

He learned a valuable lesson that day: sometimes, simpler is better.😁

📚 📚 📚 Story about Jake, software engineer at Ansys 😁

Jake was bored. He had been working as a software engineer at Ansys for three years, and he felt like he had seen it all. He had simulated everything from fluid dynamics to structural mechanics, from electromagnetics to acoustics. He had helped countless clients optimize their designs and solve their engineering problems. But he wanted more. He wanted a challenge. He wanted excitement. He wanted adventure.

That's why he joined the Hackers Club, a secret group of Ansys employees who used their skills and access to create unauthorized and illegal simulations for fun. They had simulated wars, disasters, crimes, and fantasies. They had hacked into government databases, corporate networks, and military systems. They had created their own virtual reality world, where they could do anything they wanted without consequences.

But Jake wanted more. He wanted the ultimate simulation. He wanted to face the most terrifying and thrilling scenario imaginable. He wanted to survive a zombie apocalypse.

He had spent months working on his project, using Ansys to create realistic models of zombies, weapons, vehicles, buildings, and environments. He had programmed the zombies to behave according to various rules and parameters, such as speed, strength, intelligence, hunger, and infection. He had designed the weapons to have realistic physics and effects, such as recoil, accuracy, damage, and ammo. He had created the vehicles to have realistic performance and handling, such as speed, acceleration, braking, and fuel. He had modeled the buildings and environments to have realistic features and interactions, such as doors, windows, walls, floors, roofs, and objects. He had also added some random elements and surprises, such as weather, events, and encounters, to make the simulation more dynamic and unpredictable.

He had tested his simulation several times, tweaking and improving it until he was satisfied. He had also invited some of his fellow hackers to join him, promising them the most immersive and intense experience of their lives. They had agreed, eager to try his masterpiece.

They had chosen a night when they knew the security was lax and the building was empty. They had sneaked into the Ansys headquarters, where they had access to the most powerful computers and the most advanced VR equipment. They had plugged in their headsets, controllers, and suits, and entered the simulation.

They had chosen to start in a small town, where they had a car, some weapons, and some supplies. Their goal was to reach a military base, where they hoped to find a helicopter and escape. They had to avoid or fight the zombies, scavenge for resources, and cooperate with each other. They had also set the difficulty level to hard, meaning the zombies were faster, stronger, smarter, and more numerous. They wanted a challenge, after all.

They had been playing for an hour, and they had already faced many dangers and difficulties. They had lost their car, their ammo, and some of their supplies. They had also lost two of their teammates, who had been bitten and turned into zombies. They had to kill them, which was not easy, as they still looked and sounded like their friends. They had also encountered some other survivors, who were not friendly, and tried to rob them or kill them. They had to fight them, too, which was not easy, as they were also human.

They had reached the outskirts of the city, where they hoped to find another car, or at least a safe place to rest. They had been running and hiding for a while, and they were tired, hungry, thirsty, and scared. They had also lost contact with each other, as their radios had run out of battery. They had to find each other, and regroup.

Jake was alone, and he was scared. He had lost his gun, his knife, and his backpack. He had nothing but his clothes, his headset, and his controller. He had also lost his sense of direction, and he didn't know where he was. He had wandered into a dark alley, where he hoped to find a way out. He didn't.

He heard a growl behind him, and he turned around. He saw a zombie, and he froze. It was a woman, or it used to be. She had long blonde hair, blue eyes, and a pretty face. She was wearing a white dress, stained with blood. She looked familiar, and he realized why. She was his ex-girlfriend, Lisa. He had dated her for two years, and he had loved her. He had broken up with her six months ago, and he had regretted it. He had missed her, and he had wanted to see her again. He didn't.

She lunged at him, and he dodged. She grabbed his arm, and he pulled. She bit his shoulder, and he screamed. He felt a sharp pain, and a warm blood. He felt a cold numbness, and a dark fear. He knew he was infected, and he knew he was doomed. He pushed her away, and he ran. He ran out of the alley, and into the street. He saw more zombies, and he ran. He ran past cars, shops, and houses. He ran past people, alive and dead. He ran past his teammates, who saw him and called him. He ran past the military base, where he saw a helicopter and a fence. He ran past the exit, where he saw a button and a sign. He ran past everything, and he ran into nothing.

He collapsed, and he died. He died in the simulation, and he died in reality. He died of blood loss, and he died of shock. He died of infection, and he died of fear. He died alone, and he died in pain.

He died, and he woke up. He woke up in the Ansys headquarters, and he woke up in the real world. He woke up in his headset, and he woke up in his body. He woke up alive, and he woke up scared.

He looked around, and he saw his fellow hackers. They were also alive, and they were also scared. They had also died in the simulation, and they had also woken up in reality. They had also experienced the most immersive and intense experience of their lives, and they had also regretted it.

They looked at each other, and they said nothing. They said nothing, because they had nothing to say. They had nothing to say, because they had learned a lesson. They had learned a lesson, and they had learned it the hard way.

They had learned that some simulations are better left uncreated, and some experiences are better left untried. They had learned that some challenges are better left unaccepted, and some adventures are better left unexplored. They had learned that some fantasies are better left unrealized, and some realities are better left unchanged.

They had learned that some things are better left alone.``` 

THIS IS FICTIONAL STORY , DO NOT TRY THIS AT HOME 🤓😁😁😁💥💥