Tips & Tricks

Gridding a Hemisphere in a Box with a Structured Butterfly Grid

Since spheres, hemispheroids, ellipsoids, and related geometries are very common in a great variety of problems, some techniques have been developed to mesh this class of geometries with structured grid systems. Just as a butterfly grid can be used to grid a circular face, here we will demonstrate how this approach is used to create a 3D butterfly grid for meshing a hemisphere.

Get a Better Grip on CFD-GEOM by Setting the Rotation Point

In the CFD-GEOM graphics window, your model rotates around a 'rotation point'. By default, the rotation point is located at the geometric center of your model, which may not always be convenient. You can easily change the rotation point using the rotation point icon on the toolbar.