debian man page for 2d

2D(3rheolef)							    rheolef-6.1 						      2D(3rheolef)

NAME
       2D -- rate of deformation tensor

SYNOPSIS
	       form (const space V, const space& T, "2D");

DESCRIPTION
       Assembly  the  form associated to the rate of deformation tensor, i.e. the symmetric part of the gradient of a vector field.  These deriva-
       tive are usefull in fluid mechanic and elasticity.

			/
			|
	     b(u,tau) = | 2 D(u) : tau dx,
			|
			/ Omega

       where

	    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.

EXAMPLE
       The following piece of code build the Laplacian form associated to the P1 approximation:

	       geo omega ("square");
	       space V (omega, "P1", "vector");
	       space T (omega, "P0", "tensor");
	       form  b (V, T, "2D");

rheolef-6.1							    rheolef-6.1 						      2D(3rheolef)