How to improve (reduce) skewness factor in Ansys Mechanical and CFD

 Skewness is a measure of how much a cell deviates from an ideal shape. It is one of the most important indicators of mesh quality, as highly skewed cells can reduce the accuracy and stability of the numerical solution. Skewness is defined differently for different types of cells, such as triangles, tetrahedra, hexahedra, or polyhedra. In general, skewness is calculated as the difference between the shape of the cell and the shape of an equilateral cell of equivalent volume. The skewness value ranges from 0 to 1, where 0 means no skewness and 1 means maximum skewness. A good mesh should have low skewness values for most of the cells.

In ANSYS Mechanical and CFD, you can check the skewness of your mesh using various methods. For example, you can use the Report Quality button in the General task page to print a message to the console that shows the maximum cell skewness in your mesh. You can also use the Equivolume Skewness option in the Mesh Metric dropdown list in the Mesh Control task page to display a contour plot of the skewness on your mesh³. You can also use the Mesh Quality Criteria dialog box to set the minimum acceptable skewness value for your mesh and generate a report that shows how many cells violate this criterion.

There are different ways to improve your mesh quality and reduce the skewness in ANSYS. Here are some suggestions that you can try:

• Modify your geometry to avoid sharp angles, small gaps, or thin features that can cause highly skewed cells. You can use the Geometry tool in ANSYS to edit your model and simplify it if possible.
• Choose an appropriate element type for your mesh, such as tetrahedra, hexahedra, or polyhedra. Different element types have different skewness definitions and criteria. Generally, hexahedral elements have lower skewness than tetrahedral elements, but they are more difficult to generate for complex geometries. Polyhedral elements can adapt to any geometry and have lower skewness than tetrahedral elements, but they require more memory and computational time.
• Adjust your element size to balance between accuracy and efficiency. A smaller element size can capture more details of the geometry and the physics, but it can also increase the number of cells and the skewness. A larger element size can reduce the number of cells and the skewness, but it can also lose some important information and introduce errors. You can use the Size Function option in ANSYS Meshing to control the element size based on various criteria, such as curvature, proximity, or sphere of influence.
• Apply different meshing methods to different parts of your geometry, such as patch conforming, patch independent, or cutcell. Different meshing methods have different advantages and disadvantages in terms of quality, speed, and robustness. You can use the Method option in ANSYS Meshing to select the best meshing method for each part of your model.
• Refine your mesh based on the change in cell volume or the gradient of cell volume. This can improve the smoothness of your mesh and reduce the skewness. You can use the Refinement option in ANSYS Meshing to refine your mesh based on various criteria, such as face size, face proximity, or face curvature.

You can check the skewness of your mesh using various methods in ANSYS Mechanical and CFD. For example:

• You can use the Report Quality button in the General task page to print a message to the console that shows the maximum cell skewness in your mesh.
• You can use the Equivolume Skewness option in the Mesh Metric dropdown list in the Mesh Control task page to display a contour plot of the skewness on your mesh.
• You can use the Mesh Quality Criteria dialog box to set the minimum acceptable skewness value for your mesh and generate a report that shows how many cells violate this criterion.

There are other ways to improve the skewness factor besides the ones I mentioned in my previous response. Here are some additional suggestions that you can try:

• Use the skewness correction option in ANSYS Meshing to automatically adjust the node positions of highly skewed cells. This option can improve the skewness of tetrahedral and hexahedral elements by moving the nodes along the edges or faces of the cells¹.
• Use the smoothing option in ANSYS Meshing to iteratively relocate the nodes of the mesh to optimize the cell quality. This option can reduce the skewness of tetrahedral, hexahedral, and polyhedral elements by minimizing the distortion of the cells².
• Use the inflation option in ANSYS Meshing to create a boundary layer mesh near the walls or boundaries of your geometry. This option can improve the skewness of tetrahedral and polyhedral elements by creating prism or pyramid elements near the walls, which have better alignment with the flow direction³.

I hope these suggestions help you further improve your skewness factor in ANSYS. 😊

If U want to read more interesting tips and tutorials try links below 

Cooling process of the gear on Transient Thermal (Ansys Workbench)

What is Ansys Speos and how to use

What is Young Modulus in Ansys Mechanical (impact of this factor for structural analysis)

How to define porosity (porous medium) in Ansys CFD (Fluent, CFX)

Cooling process of the gear on Transient Thermal (Ansys Workbench)

 Transient Thermal module is a type of analysis that allows you to simulate the temperature changes and heat transfer in a system over time. It is useful for studying problems that involve time-dependent thermal loads, such as heat treatment, electronic cooling, engine heating, etc.

In Transient Thermal module, you need to specify the initial temperature distribution, the material properties (such as density, specific heat, and thermal conductivity), the boundary conditions (such as convection, radiation, and heat flux), and the time steps for the analysis. The module will solve the heat conduction equation for each time step and generate the results for the temperature, heat flux, heat transfer coefficient, etc.

You can also use Transient Thermal module to perform coupled thermal-structural analysis, where the thermal results are transferred to a structural analysis to calculate the thermal stresses and strains. This can help you evaluate the effects of thermal expansion, contraction, and deformation on your system.

If you want to learn more about Transient Thermal module in Ansys workbench, you can check out some of these resources:

- [Intro to Transient Thermal Analysis - ANSYS Innovation Courses](^5^): This is a PDF document that introduces the basics of transient thermal analysis and the governing equation.

- [Transient Thermal Analysis in ANSYS](^1^): This is a YouTube video that shows you how to do a transient thermal analysis in Ansys workbench with an example problem.

- [Transient heat transfer analysis using ANSYS workbench](^2^): This is another YouTube video that demonstrates how to perform transient heat transfer analysis using Ansys workbench with a different example problem.

I hope this helps you understand what is Transient Thermal module in Ansys workbench.

Source:

(1) Intro to Transient Thermal Analysis - ANSYS Innovation Courses. https://courses.ansys.com/wp-content/uploads/2020/05/Lesson-1-Introduction-to-transient-analysis.pdf.

(2) Transient Thermal Analysis in ANSYS - YouTube. https://www.youtube.com/watch?v=4Jj0s-DAvfg.

(3) Transient heat transfer analysis using ANSYS workbench. https://www.youtube.com/watch?v=wJW6IIovyPo.

(4) ANSYS Transient Thermal Tutorial - Convection of a Bar in Air. https://www.youtube.com/watch?v=fd0xQQ1IGvw.

(5) Setup Transient Thermal Analysis - ANSYS Innovation Courses. https://courses.ansys.com/index.php/courses/radiation-between-surfaces/lessons/physics-setup-lesson-5-16/topic/setup-transient-thermal-analysis/.

What is Ansys Speos and how to use

 ANSYS Speos is a software that can simulate and optimize the optical performance of systems, such as lighting, cameras, sensors, displays, etc. It can help you design and validate optical systems that meet your specifications and requirements. You can use ANSYS Speos when you want to:

• Predict the illumination and optical behavior of your system in realistic conditions
• Evaluate the impact of optical elements on human vision and perception
• Optimize the optical design to improve efficiency, quality, and safety
• Integrate optical simulation with other ANSYS products for multiphysics analysis
• Reduce prototyping time and costs by using virtual testing and validation

Some of the features and capabilities of ANSYS Speos are:

• Virtual Lighting Animation Tool: This tool helps you post-process simulation results by defining timelines for each source’s power ratio and directly producing animation videos. This is useful for automotive lighting animation, where you can highlight the temporal variation of the source’s power¹.
• Texture Mapping Preview Tool: This tool allows you to display texture directly on ASP geometry, allowing you to see the size and orientation of the texture. This display automatically updates while editing texture definition, showing the impact of modifications¹.
• Optical Surface/Optical Lens Defined by Excel: This feature makes it easy to control each facet’s parameter using a spreadsheet, providing more flexibility and efficiency. You can use formulas to smoothly vary a parameter along the surface, use a spreadsheet as a template for other designs, and easily optimize thousands of patterns¹.
• Speos Pattern: This feature allows you to combine all source instances into a single component, making it faster to define the patterned source and easier to browse the Speos Tree. This is useful for LED arrays, which are achieved by duplicating the source multiple times¹.
• LiDAR - Imager resolution for Scanning/Rotating types: This feature offers more flexibility in the representation of LiDAR models, making it possible to use a pixel resolution for scanning and rotating LiDAR sensors¹.
• Block Recording Enhancement – Support of OPD Features: This feature allows you to build a design and update design parameters while keeping the history. This is useful for parametric studies and optimization¹.
• Connection with Multiphysics Simulations: You can couple ANSYS Speos with other ANSYS products, such as ANSYS Mechanical, ANSYS Fluent, ANSYS HFSS, etc., to perform multiphysics analysis of your optical system. For example, you can simulate the thermal effects on your optical system using ANSYS Mechanical and ANSYS Speos².
• CAD Connection: You can import and export your optical system from and to various CAD software, such as CATIA, Creo, NX, SolidWorks, etc., using ANSYS Speos. This allows you to maintain consistency and compatibility between your optical design and your mechanical design³.
• Visibility and Legibility: You can evaluate how your optical system affects human vision and perception using ANSYS Speos. For example, you can assess the visibility and legibility of displays, signs, symbols, etc., using various criteria, such as contrast ratio, luminance uniformity, color difference, etc.
• Ansys Cloud Integration: You can use ANSYS Cloud to run your optical simulations faster and easier using cloud computing resources. You can access ANSYS Cloud directly from ANSYS Speos interface and manage your cloud projects seamlessly.
• Speos Live Preview: You can use this feature to preview your optical simulation results in real time using GPU acceleration. You can interact with your model and see the effects of changing parameters instantly.
• Virtual Reality: You can use ANSYS VRXPERIENCE to visualize your optical simulation results in an immersive virtual reality environment. You can experience your optical system from different perspectives and scenarios using VR headsets.
• Custom Materials Library: You can create and manage your own materials library using ANSYS Speos. You can define the optical properties of your materials, such as refractive index, transmittance, reflectance, etc., using various methods, such as measurements, formulas, or data files.
• Robust Design Optimization for Optical Design: You can use ANSYS optiSLang to perform robust design optimization for your optical system. You can define objectives and constraints for your optimization problem and use various algorithms to find the optimal solution.
• Illuminance, Luminance and Intensity: You can measure and analyze these quantities for your optical system using ANSYS Speos. You can use various tools, such as sensors, probes, cameras, etc., to capture these values at different locations and angles.
• Human Vision: You can simulate how humans perceive light and colors using ANSYS Speos. You can use various models, such as CIE XYZ color space, CIE Lab* color space, CIECAM02 color appearance model, etc., to represent human vision.
• Speos Lens System: You can use this feature to design and optimize complex lens systems using ANSYS Speos. You can use various tools, such as ray tracing, aberration analysis, spot diagram, etc., to evaluate the optical performance of your lens system.

I hope this gives you more information about ANSYS Speos and its features. If you want to learn more about how to use ANSYS Speos effectively, you can check out these sources: Ansys, Ansys Training, CADFEM.

To model in ANSYS Speos, you need to follow some general steps, such as:

• Define the geometry of your optical system using ANSYS SpaceClaim or import it from another CAD software.
• Define the optical properties of your materials, sources, and sensors using the Speos Optical Properties panel.
• Define the simulation settings, such as the type of analysis, the wavelength range, the ray tracing options, etc., using the Speos Simulation panel.
• Run the simulation and view the results using the Speos Results panel or the Speos Live Preview feature.
• Post-process and analyze the results using various tools, such as sensors, probes, cameras, etc., or export them to other ANSYS products for multiphysics analysis.

These steps may vary depending on the specific application and complexity of your optical system. You can find more detailed instructions and examples on how to model in ANSYS Speos from these sources: Ansys Training, Ansys, Ansys Optics.

What is Young Modulus in Ansys Mechanical (impact of this factor for structural analysis)

 

Young’s modulus is a mechanical property that measures the stiffness of a solid material. It defines the relationship between stress (force per unit area) and strain (proportional deformation) in a material in the linear elasticity regime of a uniaxial deformation. Mathematically, this can be expressed as:

Young’s modulus is one of the input parameters when performing structural analysis in ANSYS Workbench. It affects the deformation and stress distribution of the material under external loads. A higher Young’s modulus means a stiffer material that resists deformation more. A lower Young’s modulus means a more flexible material that deforms more easily.

To perform structural analysis in ANSYS Workbench, you need to define the geometry, the material properties, the mesh, the boundary conditions, and the loads of your problem. Then, you need to solve the problem and post-process the results. You can use ANSYS Mechanical or ANSYS APDL to perform structural analysis¹².

For more information on Young’s modulus and its impact on ANSYS Workbench, you can check out these sources: Ansys Learning Forum, Omnexus, Wikipedia.

The impact of Young’s modulus on the results in ANSYS Mechanical depends on the type of analysis and the material behavior. Young’s modulus is a measure of the stiffness of a material, which affects how much it deforms and stresses under external loads. Generally, a higher Young’s modulus means a lower deformation and a higher stress, while a lower Young’s modulus means a higher deformation and a lower stress.

For example, if you are performing a linear static analysis, which assumes that the material is elastic and the deformation is small, the Young’s modulus directly affects the displacement and stress results. The displacement is inversely proportional to the Young’s modulus, while the stress is directly proportional to the Young’s modulus. This means that if you increase the Young’s modulus of a material, you will get smaller displacements and larger stresses, and vice versa¹.

However, if you are performing a nonlinear analysis, which accounts for large deformations, plasticity, or other nonlinear effects, the Young’s modulus is not the only factor that affects the results. You also need to consider other material properties, such as the yield strength, the hardening model, the Poisson’s ratio, etc. The Young’s modulus still affects the initial stiffness and elastic response of the material, but it may not be the dominant factor in determining the final deformation and stress results².

Therefore, to understand the impact of Young’s modulus on the results in ANSYS Mechanical, you need to know the type of analysis you are performing, the material model you are using, and the boundary conditions and loads you are applying. You can also perform a parametric study or a sensitivity analysis to see how changing the Young’s modulus affects the results³. For more information on how to perform structural analysis in ANSYS Mechanical, you can check out these sources: Ansys Learning Forum, Ansys Blog, YouTube.

Interesting facts about Young Modulus 

Young’s modulus is a numerical constant that describes the elastic properties of a solid material when it is stretched or compressed in one direction. It is named after the 18th-century British scientist Thomas Young, who first proposed the concept of elasticity in 1807¹. However, the concept was developed earlier by Leonhard Euler in 1727, and the first experiments that used Young’s modulus in its current form were performed by Giordano Riccati in 1782.

Young’s modulus is a measure of the stiffness of a material, or how much it resists deformation under an applied force. A material with a high Young’s modulus is more rigid and less elastic than a material with a low Young’s modulus. For instance, steel has a Young’s modulus of about 200 GPa, which is about three times higher than that of aluminum. This means that steel is much harder to stretch or compress than aluminum.

Young’s modulus is only valid for small deformations that are reversible, meaning that the material returns to its original shape when the force is removed. This is called the elastic region of the material. If the force is increased beyond a certain point, the material will undergo permanent deformation, or plasticity. This is called the plastic region of the material. The point at which the material transitions from elastic to plastic behavior is called the yield point or yield strength of the material.

Young’s modulus is an important parameter in engineering and design, as it helps to determine how much a material can withstand stress without breaking or deforming. It also affects other properties of materials, such as thermal expansion, vibration, sound propagation, and elasticity of springs.

I hope this information was helpful and interesting for you. If you have any other questions or requests, please let me know. 😊

How to define porosity (porous medium) in Ansys CFD (Fluent, CFX)

 To model porosity in ANSYS Fluent, you need to define the porous zone and the porous media properties in the setup. You can follow these steps:

• In the Fluent interface, go to the Cell Zone Conditions panel and select the zone that you want to make porous. Check the Porous Zone option and click Edit.
• In the Porous Zone panel, you can choose between two methods to specify the porous media resistance: the Superficial Velocity method or the Physical Velocity method. The Superficial Velocity method uses the superficial velocity (the velocity of the fluid if there were no porosity) to calculate the pressure drop across the porous zone. The Physical Velocity method uses the physical velocity (the velocity of the fluid inside the pores) to calculate the pressure drop across the porous zone. You can also choose between isotropic or anisotropic porosity, depending on whether the porosity is uniform or varies in different directions.
• Depending on the method and the type of porosity you choose, you need to enter different parameters for the porous media. For example, if you choose the Superficial Velocity method and isotropic porosity, you need to enter the following parameters:

• Click OK to apply your settings and close the panel.

You can also use user-defined functions (UDFs) to specify more complex or variable porous media properties. For more information on how to model porosity in ANSYS Fluent, you can check out these sources: YouTube, YouTube, YouTube, Ansys Learning Forum.

To model porosity in ANSYS CFX, you need to define the porous zone and the porous media properties in the setup. You can follow these steps:

• In the CFX interface, go to the Cell Zone Conditions panel and select the zone that you want to make porous. Check the Porous Zone option and click Edit.
• In the Porous Zone panel, you can choose between two methods to specify the porous media resistance: the Superficial Velocity method or the Physical Velocity method. The Superficial Velocity method uses the superficial velocity (the velocity of the fluid if there were no porosity) to calculate the pressure drop across the porous zone. The Physical Velocity method uses the physical velocity (the velocity of the fluid inside the pores) to calculate the pressure drop across the porous zone. You can also choose between isotropic or anisotropic porosity, depending on whether the porosity is uniform or varies in different directions.
• Depending on the method and the type of porosity you choose, you need to enter different parameters for the porous media. For example, if you choose the Superficial Velocity method and isotropic porosity, you need to enter the following parameters:

• Click OK to apply your settings and close the panel.

You can also use user-defined functions (UDFs) to specify more complex or variable porous media properties. For more information on how to model porosity in ANSYS CFX, you can check out these sources: YouTube, YouTube, YouTube, CFD Online.

If U want learn some other interested topics about Ansys, check links below:

How to define Joint in Ansys Static Structural and examples to use

Types of contacts on Ansys Static Structural and examples to use

How to model cracking phenomena in Ansys Mechanical (Structural)

How to define symmetry in Ansys Mechanical and CFD (CFX, Fluent)

How to model cracking phenomena in Ansys Mechanical (Structural)

 Cracking phenomena are the processes of initiation, propagation, and failure of cracks in materials or structures due to various factors, such as stress, temperature, fatigue, corrosion, etc. Cracking phenomena can affect the performance, safety, and reliability of engineering systems and components. Therefore, it is important to be able to model and analyze cracking phenomena using simulation tools such as Ansys Mechanical.

Ansys Mechanical is a software product that provides finite element analysis (FEA) solutions for modeling structural mechanics problems. Ansys Mechanical can handle linear and nonlinear, static and dynamic, and thermal and coupled physics problems. Ansys Mechanical can also simulate various types of materials, such as metals, plastics, composites, and biomaterials.

To model cracking phenomena in Ansys Mechanical, you need to use some special features and capabilities that are available in the software. Some of these features are:

• Fracture: This is a feature that allows you to define and apply fracture criteria to your model based on stress intensity factors (SIFs), energy release rates (ERRs), or J-integrals. Fracture can be used to simulate linear elastic fracture mechanics (LEFM) or nonlinear fracture mechanics (NLFM) problems. Fracture can also be used to model different types of cracks, such as pre-meshed cracks, arbitrary cracks, or semi-elliptical cracks.
• SMART Crack Growth: This is a feature that allows you to simulate the growth and propagation of cracks in your model using separating morphing adaptive remeshing technology (SMART). SMART Crack Growth can handle 2D or 3D crack problems with complex geometries and loading conditions. SMART Crack Growth can also account for mixed-mode loading, contact effects, plasticity effects, and thermal effects.
• XFEM: This is a feature that allows you to model cracks without explicitly meshing them using the extended finite element method (XFEM). XFEM can enrich the standard finite element approximation with additional functions that capture the discontinuity and singularity of the crack. XFEM can be used to model stationary or propagating cracks with various criteria, such as maximum hoop stress, maximum circumferential stress, or Paris law.

These are some of the features that you can use to model cracking phenomena in Ansys Mechanical. You can also use other features and tools that are integrated with Ansys Mechanical, such as Ansys Workbench, Ansys Fluent, Ansys APDL, etc., to create and manage your simulation projects.

If you want to learn more about how to use these features and tools to model cracking phenomena in Ansys Mechanical, you can check out some of the sources that I found using Bing:

• Ansys Multiphysics Simulation for Crack Propagation Analysis: This is a webinar that demonstrates a multiphysics simulation for crack propagation analysis using Ansys Workbench, Ansys Mechanical, and Ansys Fluent. You will learn how to use SMART Crack Growth to analyze crack growth due to thermo-mechanical fatigue (TMF).
• Get Cracking with ANSYS Workbench 19.2: This is an article that revisits Ansys Workbench to carry out a series of fracture mechanics analyses using SMART Crack Growth. You will learn how to create and edit joints in Ansys Workbench, how to specify the degrees of freedom, stiffness, damping, and friction properties for the joints, how to apply loads and moments to the joints, and how to post-process the results of the joint analysis.
• how to create a crack on a 3D surface body in ANSYS workbench?: This is a forum thread that discusses how to create a crack on a 3D surface body in Ansys Workbench using Pre-Meshed Crack option. You will learn how to select the crack edge, top surface, bottom surface, and coordinate system for the crack definition.

If you are looking for some material models that can handle the cracking phenomena in Ansys Mechanical, you are in luck! I have found some amazing models that can do just that. Let me tell you more about them:

- **Anisotropic Plasticity using Hill Potential**: This model is perfect for metals that have different strengths in different directions, like a sheet of paper. It can show you how the metal gets damaged and breaks due to bending or stretching.

- **Cast Iron**: This model is great for cast iron materials, which are very strong when you squeeze them, but very weak when you pull them apart. It can show you how the cast iron cracks and shatters under tension, and how it depends on the temperature, the speed of loading, and the shape of the grains.

- **Microplane**: This model is awesome for concrete, which is a mixture of rocks, cement, and water. It can show you how the concrete cracks and softens when you pull it, and how it crushes and expands when you push it.

- **Shape Memory Alloys**: This model is amazing for shape memory alloys, which are metals that can change their shape when you heat them or stress them. It can show you how the shape memory alloys transform from one phase to another, and how they recover their original shape after being deformed.

These are some of the material models that can help you with your cracking phenomena in Ansys Mechanical. You can learn more about them by clicking on the links I have provided. I hope you find this interesting and helpful. 

The sources for the text are:

- [Understand a Design’s Breaking Point with Simple Crack Propagation Simulations](^1^): This is a blog post from Ansys that explains how to use the unstructured mesh method (UMM) and the separating morphing and adaptive remeshing technology (SMART) to simulate crack propagation in Ansys Mechanical. It also compares the results of UMM with the traditional hexahedral mesh method.

- [Material property data for engineering materials](^2^): This is a PDF document from Ansys that provides some material property data for common engineering materials, such as density, thermal conductivity, elastic modulus, etc. It also includes some physical constants, such as the gas constant, the Boltzmann constant, etc.

- [Simulate Brittle Cracking](^3^): This is a forum post from Ansys Learning Forum that discusses how to simulate the cracking of a nutshell in Ansys static structural. It also provides some screenshots of the model and the boundary conditions.

(1) Understand a Design’s Breaking Point with Simple Crack ... - Ansys. https://www.ansys.com/blog/breaking-point-crack-propagation-strength-of-materials.

(2) Material property data for engineering materials - Ansys. https://www.ansys.com/content/dam/amp/2021/august/webpage-requests/education-resources-dam-upload-batch-2/material-property-data-for-eng-materials-BOKENGEN21.pdf.

(3) Simulate Brittle Cracking - Ansys Learning Forum. https://forum.ansys.com/forums/topic/simulate-brittle-cracking/.

I hope this helps you understand how to model cracking phenomena in Ansys Mechanical. If you have any questions or feedback, please let me know. 😊

If U want learn some other interested topics about Ansys, check links below:

How to define symmetry in Ansys Mechanical and CFD (CFX, Fluent)

Types of contacts on Ansys Static Structural and examples to use

What is conjugate heat transfer and how to use in Ansys Fluent

What is, and when to use MRF method in Ansys Fluent

How to define symmetry in Ansys Mechanical and CFD (CFX, Fluent)

 Symmetry is a property of a system or a phenomenon that remains unchanged under certain transformations, such as reflection, rotation, or translation. Symmetry can be used to simplify the modeling and analysis of complex structures or problems by reducing the size and complexity of the model. Symmetry can also improve the accuracy and efficiency of the solution by eliminating unnecessary degrees of freedom and reducing numerical errors.

Ansys Mechanical is a software product that provides finite element analysis (FEA) solutions for modeling structural mechanics problems. Ansys Mechanical can handle linear and nonlinear, static and dynamic, and thermal and coupled physics problems. Ansys Mechanical can also simulate various types of materials, such as metals, plastics, composites, and biomaterials.

To model symmetry in Ansys Mechanical, you need to use some special features and capabilities that are available in the software. Some of these features are:

• Symmetry Region: This is a feature that allows you to define and apply symmetry boundary conditions to your model based on the type and plane of symmetry. Symmetry Region can be used to model planar symmetry, cylindrical symmetry, spherical symmetry, or sector symmetry. Symmetry Region can also visually expand the results to show the full model for symmetric cases.
• Slice: This is a feature that allows you to cut or split your model into smaller parts or slices based on a plane or a surface. Slice can be used to create symmetric parts or sectors from an original model. Slice can also preserve the material properties and mesh quality of the original model.
• Coordinate System: This is a feature that allows you to create and align local coordinate systems based on the geometry or orientation of your model. Coordinate System can be used to define the direction and location of loads, supports, joints, or other features in your model. Coordinate System can also be used to specify the plane or axis of symmetry for your model.

Here are some examples of how to use these features to model symmetry in Ansys Mechanical for different types of problems:

• Understanding When to Take Advantage of Symmetry Using Ansys Mechanical — Lesson 3: This is a video that shows how to use Symmetry Region to model planar symmetry and sector symmetry for a mechanical part with bolted connections. You will learn how to split bodies for symmetry in Ansys SpaceClaim, how to connect line bodies with solid bodies via Contact Region in Ansys Mechanical, how to create and align local Coordinate Systems based on geometry, how to define Bolt Pretension load in Ansys Mechanical, and how to visually expand symmetry results to show the full model.
• How to setup Cyclic Symmetry model in ANSYS Workbench Mechanical: This is a video that shows how to use Slice and Coordinate System to model cylindrical symmetry for a turbine blade with centrifugal loading. You will learn how to slice a 3D body into a single-sector body in Ansys SpaceClaim, how to create a cylindrical coordinate system in Ansys Mechanical, how to apply rotational velocity and pressure loads in Ansys Mechanical, and how to post-process the results using cyclic expansion.
• Understanding when to Take Advantage of Symmetry - Lesson 3: This is an article that revisits Ansys Workbench to carry out a series of fracture mechanics analyses using SMART Crack Growth. You will learn how to use Slice and Symmetry Region to model planar symmetry for a cracked plate with tensile loading. You will also learn how to apply fracture criteria based on stress intensity factors (SIFs) or energy release rates (ERRs) in Ansys Mechanical.

CFD Software 

Ansys Fluent and Ansys CFX are software products that provide computational fluid dynamics (CFD) solutions for modeling fluid flow and heat transfer phenomena. Ansys Fluent and Ansys CFX can handle various types of fluid flow problems, such as laminar or turbulent, compressible or incompressible, steady or transient, etc. Ansys Fluent and Ansys CFX can also simulate various types of fluids, such as gases, liquids, multiphase, reacting, etc.

To model symmetry in Ansys Fluent and Ansys CFX, you need to use some special features and capabilities that are available in the software. Some of these features are:

• Symmetry Boundary Condition: This is a feature that allows you to define and apply symmetry boundary conditions to your model based on the type and plane of symmetry. Symmetry boundary condition can be used to model planar symmetry, cylindrical symmetry, spherical symmetry, or sector symmetry. Symmetry boundary condition can also visually expand the results to show the full model for symmetric cases.
• Slice: This is a feature that allows you to cut or split your model into smaller parts or slices based on a plane or a surface. Slice can be used to create symmetric parts or sectors from an original model. Slice can also preserve the material properties and mesh quality of the original model.
• Coordinate System: This is a feature that allows you to create and align local coordinate systems based on the geometry or orientation of your model. Coordinate System can be used to define the direction and location of loads, supports, boundaries, or other features in your model. Coordinate System can also be used to specify the plane or axis of symmetry for your model.

I see that you want to see some examples of how to use symmetry in Ansys CFX and Ansys Fluent. Symmetry is a property of a system or a phenomenon that remains unchanged under certain transformations, such as reflection, rotation, or translation. Symmetry can be used to simplify the modeling and analysis of complex fluid flow problems by reducing the size and complexity of the model. Symmetry can also improve the accuracy and efficiency of the solution by eliminating unnecessary degrees of freedom and reducing numerical errors.

Ansys CFX and Ansys Fluent are software products that provide computational fluid dynamics (CFD) solutions for modeling fluid flow and heat transfer phenomena. Ansys CFX and Ansys Fluent can handle various types of fluid flow problems, such as laminar or turbulent, compressible or incompressible, steady or transient, etc. Ansys CFX and Ansys Fluent can also simulate various types of fluids, such as gases, liquids, multiphase, reacting, etc.

To use symmetry in Ansys CFX and Ansys Fluent, you need to use some special features and capabilities that are available in the software. Some of these features are:

• Symmetry Boundary Condition: This is a feature that allows you to define and apply symmetry boundary conditions to your model based on the type and plane of symmetry. Symmetry boundary condition can be used to model planar symmetry, cylindrical symmetry, spherical symmetry, or sector symmetry. Symmetry boundary condition can also visually expand the results to show the full model for symmetric cases.
• Slice: This is a feature that allows you to cut or split your model into smaller parts or slices based on a plane or a surface. Slice can be used to create symmetric parts or sectors from an original model. Slice can also preserve the material properties and mesh quality of the original model.
• Coordinate System: This is a feature that allows you to create and align local coordinate systems based on the geometry or orientation of your model. Coordinate System can be used to define the direction and location of loads, supports, boundaries, or other features in your model. Coordinate System can also be used to specify the plane or axis of symmetry for your model.

Here are some examples of how to use these features to model symmetry in Ansys CFX and Ansys Fluent for different types of problems:

• Show Symmetry at CFD-POST (Results): This is a forum thread that shows how to use Symmetry Boundary Condition to model planar symmetry and sector symmetry for a half structure with an obstacle in the flow. You will learn how to set Symmetry (at Z axis) in Ansys Fluent, how to enable Beta Options in Workbench, and how to visually expand symmetry results in CFD-POST.
• ANSYS Fluent Tutorial | Parametric Analysis In ANSYS Fluent | ANSYS Fluent Beginners Tutorial | CFD: This is a video that shows how to use Slice and Coordinate System to model planar symmetry for an airfoil with angle of attack variation. You will learn how to slice a 2D body into a half body in Ansys SpaceClaim, how to create a Cartesian coordinate system in Ansys Fluent, how to apply inlet velocity and outlet pressure boundary conditions in Ansys Fluent, and how to post-process the results using parametric analysis.

I hope these examples help you learn how to use symmetry in Ansys CFX, Fluent and Mechanical. If you have any questions or feedback, please let me know. 😊

If U want learn some other interested topics about Ansys, check links below:

How to define Joint in Ansys Static Structural and examples to use

Types of contacts on Ansys Static Structural and examples to use

What is conjugate heat transfer and how to use in Ansys Fluent