CFD simulation using the immersed boundary method

Use the immersed boundary method (IBM) workflow to perform CFD analysis of your models. This workflow significantly speeds up model preparation by focusing on problem setup, rather than geometry cleanup.

IBM mesh with immersed obstacles

The flow solver initiates an IBM run when it detects immersed boundary meshes in the FEM.

With IBM:

• The fluid mesh does not conform to the walls.

• Solids are immersed in the fluid immersed boundary mesh.

• The flow solver resolves the wall.

Flow results from an IBM run

IBM workflow

The following steps summarize the IBM workflow:

1. Create an immersed boundary mesh, which represents the fluid domain.

2. Mesh the IBM domain boundary with 2D or 3D elements to automatically detect flow surfaces and specify flow boundary conditions. The mesh resolution resolves the geometric details of the fluid domain boundaries. The flow solver uses the IBM mesh for numerical calculations. For coupled-thermal-flow solutions, these 2D and 3D solid elements require thermal material properties that the thermal solver uses for thermal calculations.

3. Create a flow or thermal-flow solution with flow boundary conditions.

4. Solve the solution and post process the results.

Learn more

Immersed boundary meshing

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Geometry preparation for immersed boundary method

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CFD simulation using the immersed boundary method, Simcenter 3D 2021.1 Series

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