Suppose I’m solving a BVP L(u) = f, \quad \mathrm{in} \; \Omega \subset \mathbb{R}^2 with u = g_D, \quad \mathrm{on} \; \partial\Omega_D and I want to evaluate u, \nabla u at some \mathbf{x} \in \Omega. Is there an easy way to do this in FEniCS or do I have to manually get the values at DoFs and…

The points have the wrong shape (single point, the function expects multiple points): from mpi4py import MPI import numpy as np from dolfinx import mesh from dolfinx import fem from dolfinx.fem import FunctionSpace from dolfinx import default_scalar_type import ufl from dolfinx.fem.petsc imp…

Evaluating Finite Element Function

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dokken January 31, 2024, 5:18pm 2

This depends on if you are using fenics or FEniCSx.
See for instance: Evaluation of UFL expression at mesh points - #6 by dokken and subsequent points.

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Evaluating Finite Element Function

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