How to assgin values to the components of a mixed function

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Please note that you have to specify what version of dolfin you are using (if it is legacy, or if it is DOLFINx what version).

Please also consider similar topics such as:

Usage of FunctionAssigner

As you are working with a 3 dimensional mesh, the vector function space has three components: T_S_1 = interpolate(S_11, T) T_S_2 = interpolate(S_12, T) T_s_0 = Function(T) # Function containing 0 values assigner = FunctionAssigner(V, [T, T, T]) assigner.assign(v, [T_S_1, T_S_2, T_s_0])

or

How to correctly assign values to mixed elements in FEniCS-X?

Consider the following: import dolfinx from mpi4py import MPI import dolfinx.io import ufl import numpy as np mesh = dolfinx.UnitSquareMesh(MPI.COMM_WORLD, 10, 10) el = ufl.FiniteElement("CG", mesh.ufl_cell(), 1) mel = ufl.MixedElement([el, el]) V = dolfinx.FunctionSpace(mesh, mel) num_subs = V.num_sub_spaces() spaces = [] maps = [] for i in range(num_subs): space_i, map_i = V.sub(i).collapse(collapsed_dofs=True) spaces.append(space_i) maps.append(map_i) u = dolfinx.Function(V) u…