Mesh Refinement
The finite volume mesh can also be controlled by mesh refinements. This feature enables you to define rectangular areas about objects for local in-depth analyses of the wind flow, for example.
To create a new mesh refinement, select New Mesh Refinement on the Insert menu, or use the shortcut menu of the Mesh Refinements item in the Data navigator.
The Mesh Refinement dialog box is opened.
In the Mesh Density section, you can set the target length of the mesh cells within the refinement. The size and location of the box-shaped refinement area is to be defined in the Location and Dimensions section below; the dimensions in X, Y and Z refer to the origin. The [Adjust graphically] button enables you to define the size of the area in the work window – similarly to the function to adjust the wind tunnel (see the Chapter 'Wind Tunnel').
To get a notion of the adequate cell size within the refinement, check the size of the global mesh elements in the 'Simulation Parameters' dialog box.
Note
When the parameters have been set, you can generate the mesh and check its shape. The “M05_Golf” model in the Demo project group, for example, shows two mesh refinements defined for the side mirrors of the car.
