Videos > Conformal meshing - Ansys Icepak
Jan 24, 2024

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Welcome to Part Two of iSpec Geometry Creation and Setting Up for Solution

In this part, we will focus on meshing the geometry that we created previously. Let's begin by changing the display preferences to enhance visibility.

Display Preferences

  • Changed the display color of the background.

Generating the First Mesh

  1. Open the meshing tool and select Measure HD.
  2. Use the default values and generate the mesh.
  3. Observe the updated number of elements and nodes.

Mesh Display and Analysis

  • Display the mesh and create a cut plane using wire mesh options.
  • Change the mesh color and the location of the cut region to analyze different locations.
  • Remove the mesh, keep the wires, and set the structure to horizontal screen select for different display cuts.

Surface Mesh Examination

  • Select the fans and examine the surface mesh using the solid fill option.
  • Check the quality of the mesh, focusing on face alignment and skewness.

Generating a Coarse Mesh

  1. Change the mesh to a coarser setting and generate the mesh.
  2. Notice the decrease in the number of elements from 45,000 to approximately 25,000.

Generating a Fine Mesh

  1. Switch to a finer mesh setting and reduce cell sizes.
  2. Be aware that this process can be lengthy, potentially resulting in over 600 million cells.
  3. Interrupt the process and revert to the normal mesh setting.

Adding Local Sizing

  1. Add local sizing to specific bodies, starting with the AGP heat sink.
  2. Use per-object parameters and set sizing parameters to 15, 10, and 10.
  3. Generate the mesh again, increasing the number of elements to 57,000.

Understanding Minimum Gap

  1. Create a block and examine the geometry to control the mesh.
  2. Generate the mesh and display it to observe the surface mesh.
  3. Note that gaps smaller than the minimum gap are ignored, removing unnecessary small cells.

Adjusting Minimum Gap in X Direction

  1. Change the minimum gap in the X direction and generate the mesh again.
  2. Observe the presence of a fluid region between objects and an increase in cell count.

Eliminating Gaps by Snapping Geometry

  1. Select Block 1 and change settings to start and end.
  2. Use a macro for automatic mesh settings, selecting medium productivity.
  3. Generate the mesh, resulting in 170,000 cells.

Conclusion

This concludes our session on creating and controlling the meshing strategy in iSpec. Thank you for watching.

Note: This transcript is based on a video by Ozen Engineering, Inc.

[This was auto-generated. There may be mispellings.]

Welcome to part two of iSpec geometry creation and setting up for solution. In part two, we are going to mesh the geometry we created previously. Before we set up the mesh, let's change the display preferences. We have changed the display color of the background.

Now, we will generate our first mesh. To do that, we open the meshing and select "Measure HD." We are going to use the default values and generate the mesh. As the mesh has been generated, the number of elements and number of nodes are updated here.

We can display the mesh, create a cut plane, and look at the wire mesh options. We can change the mesh color and location of the cut region. Now, we would like to see the surface mesh. We select the fans, think, look at the surface mesh, and see how it looks like with the solid fill option.

We can see the face alignment and change the minimum and maximum value. We will generate a new mesh, which will be a little bit coarser, and see how that goes. We can change the minimum element and gap or edge values. We will add some local sizing to specific bodies and generate the mesh again.

Now, we have a high number of elements. We can set the per object parameter from the project standard and add specific values for cell refinement. We will try to understand what the minimum gap is. We can control the mesh over specific bodies and generate the mesh.

The gaps, which are less than the minimum gap, will be ignored, and the unnecessary small cells will be removed. This increases computational time by a huge amount. The resolution is effectively controlled by the object with higher priority.

Now, let's go to the next step and change the minimum gap in the X direction. Generate the mesh again and display it. Now, you can see the gap is present, and you have a fluid region between them. Also, because you have smaller cells, you have a higher number of cell count.

The most effective way of eliminating gaps is by snapping geometry. So, let's select Block 1, change it to start and end, and make it inactive. We will use the macro to automatically set mesh settings. Now, we have 170,000 cells.

This is how we create a mesh and control the meshing strategy in iSpec. Thank you.

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