Obstacles to overcome ... Duel on SimScale !!!

on

Today I would like to present you a duel of two obstacles that will be overcome by invincible oil (properties and types are given below). We will check which obstacle is more effective in fighting with this fluid. Two analyzes (two obstacles) were performed as Incompressible Flow in SimScale.


Duel of Obstacles in SimScale 

We set the analysis as a steady state (1), while the turbulence model is defined as k-omega SST (1). As the fluid, we choose Oil with the properties given in the box (gray box -2).


Simulation settings and oil properties 

In both cases, our inlet is in the same place and oil flows out of it at a speed of 2 m / s (1). For both geometries, the outlet is also in the same place, defined as a pressure outlet with a value of 1 atm ABS.

Outlet and Inlet definition in SimScale 

Leave all residuals, relaxations (1) and steady state analysis settings in the default mode (2).

Settings of Steady State Incompressible Flow Analysis in Default Mode 

In the case of discretization, we also leave all settings at the default position (the slider at 5).


Regarding residuals, we see slight differences in the graph regarding the turbulence model (red omega curve).

Residuals for both cases 

In the case of velocity distributions on the cross-section, we can see slight differences, in particular, the maximum velocity values (figure below). Also, the formation of the oil discharge stream is slightly different in both cases.

Velocity Distribution on cross section for both cases 

For the Isosurface plot, it can be seen that for the smaller the range of velocity values, the shape of the formed space is a bit "sharper" in the case of a cuboidal obstacle.

Isosurfaces for both cases order for >2,8 m/s / 2,9 m/s 

The largest differences in value and distribution can be seen for the Turbulent Kinetic Energy parameter. For a rounded obstacle, the maximum value is almost two times lower. It can be considered that the more difficult to overcome, and therefore the winning one, is a rectangular obstacle.

Turbulent Kinetic Energy distribution on cross section in SimScale 

In the next post I will present the comparative results of the duel of the same obstacles for water.


Comments

Post a Comment

Popular POSTS

Image

Quick Tip: How to fix Error: GENERAL-CAR-CDR in Ansys (Fluent)

 The error message Error: GENERAL-CAR-CDR: invalid argument [1]: improper list means that there is a problem with the scheme code or the UDF (user-defined function) in your case or data file . Some possible solutions are: Save the case and data file and try to reopen it. Reset the Fluent Setup tab and try opening the mesh. Remesh the geometry and reopen in Fluent. Change the material definition from “Solid” to “Fluid” in Design Modeler. Change the transient to steady if you are using evaporation-condensation as the phase interaction mechanism. Check the syntax of your UDF and make sure it follows the new rules in Fluent 6.2.16 or later. I hope this helps you resolve the error. If you need more assistance, please visit the Ansys Learning Forum or contact Ansys Support . Have a nice day! 😊 Sources: 1. smartadm.ru 2. cfd-online.com 3. forum.ansys.com 4. forum.ansys.com In Polish  BÅ‚Ä…d: GENERAL-CAR-CDR oznacza, że wystÄ…piÅ‚ problem z kodem Scheme w programie Ansys Fluent. Scheme to jÄ™zyk
Image

Types of supports and examples - Ansys Static Structural

Supports are used to represent parts that are not present in the model but are interacting with it. Supports help truncate the domain, which helps in efficiently obtaining numerically accurate results without modeling parts of the geometry that are not of primary interest. There are different types of support available, among which you need to choose the appropriate one for your analysis. Here are some of the common types of supports and their explanations: - **Fixed Support**: This type of support constrains all the degrees of freedom of the selected entity (body, face, or edge). It means that the entity cannot move or rotate in any direction. Fixed support is equivalent to applying zero displacement to all directions. Fixed support is useful for modeling rigid connections or supports that do not allow any movement. For example, you can use fixed support to model a bolted joint or a clamped beam. - **Displacement Support**: This type of support specifies a zero or non-zero displacemen
Image

💥💥💥 How to define a porous model in Ansys Fluent?

 Defining a porous model in Ansys Fluent involves specifying the region of your geometry that represents the porous media and assigning its properties. Here's a breakdown of the steps: **1. Defining the Porous Zone:** * In the Setup stage of Ansys Fluent, navigate to the **Cells** menu and choose **Zones**. * In the Zones window, click **Create** and select **Fluid**. This creates a new fluid zone. * Right-click on the newly created fluid zone and choose **Edit**. * In the Edit Fluid Zone window, locate the **Porous Zone** option and enable it. This activates the porous media functionalities for this zone. **2. Specifying Porous Media Properties:** * With the Porous Zone enabled, you'll see additional options appear in the Edit Fluid Zone window. Here's what you need to define:     * **Porosity:** This represents the volume fraction of the void space within the porous media. Enter a value between 0 (solid) and 1 (all void).     * **Momentum:** You can choose between differe