Release from Domains, Boundaries, Edges, or Points
There are ray release features for every geometric entity level:
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Use the Release feature to release rays from domains in 2D or 3D.
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Use the Inlet feature to release rays from edges in 2D or surfaces in 3D.
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Use the Release from Edge feature to release rays from edges in 3D.
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Use the Release from Point feature to release rays from points in 2D or 3D.
Releasing rays from a domain, surface, or edge initializes the ray position based on the underlying finite element mesh, so the ray positions are affected by the mesh. A side effect is that the ray positions can change slightly when switching between geometry kernels.
Ray release can be uniform or proportional to a user-defined expression, which is specified in the Density proportional to text field.