Documentation

Tutorial: Hex-dominant automated – Internal flow through an angled pipe

This short tutorial shows how to create a mesh using the automated Hex-dominant operation for internal flow analysis.

Link to tutorial project containing the geometry:

Import tutorial project into workbench

  • As a first step we need to create a new simulation. To create a simulation left click on the pipe and then on Create Simulation.
Meshing, FEA Analsysis, Simscale, Pipe Geometry, Tet Dominant Meshing, Advanced Tutorial, Manual Meshing, Automatic Meshing, Internal Flow
Creating simulation for the pipe geometry
  • This dialog box allows the user to select the simulation model. Click on Incompressible.
    Meshing, FEA Analsysis, Simscale, Pipe Geometry, Tet Dominant Meshing, Advanced Tutorial, Manual Meshing, Automatic Meshing, Internal Flow
    Incompressible flow simulation for pipe
  • The default settings for the simulation are kept the same. Save the simulation model by clicking on the tick mark.
    Meshing, FEA Analsysis, Simscale, Pipe Geometry, Tet Dominant Meshing, Advanced Tutorial, Manual Meshing, Automatic Meshing, Internal Flow
    Incompressible flow analysis settings

    Mesh Generation

  •  Left click on the mesh icon to create a new mesh.
  • Choose the Hex-Dominant only Algorithm and the meshing mode to be internal
  • Select the sizing option to automatic sizing and change the desired mesh sizing to fine.
  • Specify the Number of computing cores for the meshing operation (16 in this tutorial)
Meshing, FEA Analsysis, Simscale, Pipe Geometry, Tet Dominant Meshing, Advanced Tutorial, Manual Meshing, Automatic Meshing, Internal Flow
Mesh settings for automatic mesh generation

Boundary Layer Refinement

  • In order to correctly model the flow through a pipe the boundary layer has to be resolved accurately. This can be achieved by refining the mesh in the regions close to the walls.
  • The best method to do this is by the help of a layer inflation mesh refinement. To add a mesh refinement, click on ‘+’ icon next to refinements under the mesh.
  • Select the  Layer Inflation setting
Meshing, FEA Analsysis, Simscale, Pipe Geometry, Tet Dominant Meshing, Advanced Tutorial, Manual Meshing, Automatic Meshing, Internal Flow
Boundary layer settings for boundary layer refinement
  • keep the default settings in the dialog box
Meshing, FEA Analsysis, Simscale, Pipe Geometry, Tet Dominant Meshing, Advanced Tutorial, Manual Meshing, Automatic Meshing, Internal Flow
Boundary layer settings
  • The next step is to pick the faces.
  • All faces except the inlet and outlet faces need to be selected.
  • Select all the faces of the pipe by dragging the Active box selection over the pipe and deselect the inlet and outlet faces by clicking on them.
    Meshing, FEA Analsysis, Simscale, Pipe Geometry, Tet Dominant Meshing, Advanced Tutorial, Manual Meshing, Automatic Meshing, Internal Flow
    Boundary layer face selection
  • It would be seen 5 faces are selected for boundary layer refinement.
  • Go back to the mesh option by clicking on the mesh icon and click generate.

Mesh Inspection and Mesh Clip Generation

  • Once the mesh is generated, we can check the event log for further information on our mesh.
Meshing, FEA Analsysis, Simscale, Pipe Geometry, Tet Dominant Meshing, Advanced Tutorial, Manual Meshing, Automatic Meshing, Internal Flow
Generated mesh and mesh log showing the details of meshing
  • The Boundary layer generated can easily be seen by zooming on the mesh inlet.
    Meshing, FEA Analsysis, Simscale, Pipe Geometry, Tet Dominant Meshing, Advanced Tutorial, Manual Meshing, Automatic Meshing, Internal Flow
    Boundary Layers on the inlet face
  • Click on generate mesh clip to inspect the internal mesh. Adjust the settings of the normal. Click on generate mesh clip icon.
    Meshing, FEA Analsysis, Simscale, Pipe Geometry, Tet Dominant Meshing, Advanced Tutorial, Manual Meshing, Automatic Meshing, Internal Flow
    Settings for mesh clip generation
  • The mesh clip generated is presented below:
mesh clip generation
Generated mesh clip for mesh inspection
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