Provided by: librheolef-dev_5.93-2_i386
2D -- rate of deformation tensor
form (const space V, const space& T, "2D");
Assembly the form associated to the rate of deformation tensor, i.e.
the symmetric part of the gradient of a vector field. These derivative
are usefull in fluid mechanic and elasticity.
b(u,tau) = | 2 D(u) : tau dx,
2 D(u) = grad u + (grad u)^T
If the V space is a vector-valued P1 (resp. P2) finite element space,
the T space may be a tensor-valued P0 (resp. P1d) one.
The following piece of code build the Laplacian form associated to the
geo omega ("square");
space V (omega, "P1", "vector");
space T (omega, "P0", "tensor");
form b (V, T, "2D");