Building the Mesh

This section describes the step-by-step procedure to prepare the mesh and interfaces for conjugate heat transfer in a power inverter. The creation of multiple interfaces is time consuming if it is created manually between each fluid and solid volumes. In Simerics-MP, CAD surfaces are imported, and mesh is generated for all the fluid and solid volumes along with their interfaces automatically.

Create Mesh

Select General Mesher in the Mesh Panel.
Select Advanced Mode under Setup Options.
Select all CAD Surfacesin the Geometric Entities Panel and click Add Surfaces icon for CAD Surfaces in the Properties Panel.
Ensure Relative to All CAD Surfaces is selected under Cell Size Specification.
Enter Maximum Cell Size as 0.01, Minimum Cell Size as 0.0007 and Cell Size on Surfaces as 0.005 in the Properties Panel.
Select Combined with Patches under Sub-feature Options.
Click Create Mesh. A new mesh mesh is created under Built Meshes in the Geometric Entities Panel.
The meshed volumes fluid_domain, volume, volume_01, volume_02, volume_03, volume_04, volume_05, volume_06, volume_07, volume_08, volume_09 and volume_10 are generated under Volumes.
Rename the meshed volumes as shown in the Table 11.1.

Figure 11.28 - Create mesh

Volume	Rename as
volume	Casing
volume_01	PCB
volume_02	Transformer
volume_03	Heat_sink2
volume_04	Heat_sink3
volume_05	Heat_sink1
volume_06	Chip_thermal
volume_07	Transistor2
volume_08	Transistor4
volume_09	Transistor1
volume_10	Transistor4

Table 11.1 - Rename mesh volume

The created mesh is shown below.

Figure 11.29 - Casing (solid)

Figure 11.30 - Components (solid)

Figure 11.31 - Fluid volume