Back to Finite Element (MFEM)
mfem.gridfunction.getDivergence
Computes the divergence of a vector grid function at a point within an element.
Syntax
mfem.gridfunction.getDivergence(gf, elemIdx, ip)
Description
Computes the divergence of a vector grid function at a point within an element. The divergence is computed in physical coordinates: div(F) = ∂Fx/∂x + ∂Fy/∂y + ∂Fz/∂z This is typically used with H(div) finite element spaces (Raviart-Thomas elements).
Parameters
| Name | Description |
|---|---|
| gf | - Vector GridFunction (e.g., from H(div) space) |
| elemIdx | - Index of the element containing the point (0-based) |
| ip | - Integration point in reference coordinates |
Returns
number