Building the Mesh

This section describes the step-by-step procedure for preparing the mesh for this simulation. The mesh is created using the General Mesher. An external bounding box is created, with a refined mesh zone surrounding the truck.

Truck Mesh

Select General Mesher in the Mesh Panel.
Select all CAD Surfaces in the Geometric Entities Panel and click Add Surfaces icon for CAD Surfaces in the Properties Panel.
Select Exterior Volumes from the Mesh Location drop-down list.
Select Nonuniform from Bounding Box Margins drop-down list and enter the values as follows:
- Minimum Side Sizes: 0.3, 0, 1.5
- Maximum Side Sizes: 2.0, 1.2, 1.5
Enter 0.0005 for Minimum Cell Size.
Select Box Zone Refinement from Create a Refinement Zone drop-down list and specify the following parameters under Refine Zone Options extended list:
- Enter 0.005 for Cell Size
- Enter -9.0, -1.0, -1.5 for First Corner
- Enter 11.0, 4.0, 1.5 for Diagonal Corner
Select CAB under CAD Surfaces in the Geometric Entities Panel.
Select User Input from Cell Size on Boundaries drop-down list in the Properties Panel.
Enter 0.00125 for Size under Cell Size on Boundaries.
Select Advanced Mode for Setup Options and then, select Combined with Patches for Sub-feature Options.
Click Create Mesh. A new mesh mesh is created under Built Meshes in the Geometric Entities Panel.
The meshed Volume volume is generated under Volumes.

Figure 11.182 - Mesh settings

Figure 11.183 - External volume mesh around the truck (Z cross-sectional view)