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That should bring up global mesh settings, meaning that these settings apply everywhere in the domain (Other settings may only apply to specific regions). Change the algorithm from Standard to Hex-dominant parametric. This gives more control over the mesh and primarily uses hex-based elements rather than tet-based elements. Now expand the Geometry primitives section in the navigation panel and select the Background Mesh Box. A panel should open with the minimum x, y, and z coordinates, along with the maximum x, y, and z coordinates. I used minimum values of 0, 0, and -35, and maximum values of 5, 5, and 15. Next, select the Material Point section. This point determines which volume is divided into elements, so make sure the point is located within the background mesh box, but outside of the car geometry. While we’re here, add a Cartesian box geometry primitive. Select a region trailing from the car, for example 0, 0, -20 and 2, 2, -4. This is to enclose the wake behind the car. Return to the general mesh settings. Beneath the algorithm setting, there should be a section for Bounding box resolution. I’ve been using values of 16, 16, and 160.
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