/usr/share/doc/rheolef-doc/examples/incompressible-elasticity.cc is in rheolef-doc 6.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | #include "rheolef.h"
using namespace rheolef;
using namespace std;
#include "embankment.icc"
int main(int argc, char**argv) {
environment rheolef (argc, argv);
geo omega (argv[1]);
Float inv_lambda = (argc > 2 ? atof(argv[2]) : 0);
size_t d = omega.dimension();
space Xh = embankment_space(omega, "P2");
space Qh (omega, "P1");
point f (0,0,0);
f [d-1] = -1;
trial u (Xh), p (Qh); test v (Xh), q (Qh);
field lh = integrate (dot(f,v));
form a = integrate (2*ddot(D(u),D(v)));
form b = integrate (-div(u)*q);
form mp = integrate (p*q);
form c = inv_lambda*mp;
field uh (Xh, 0), ph (Qh, 0);
solver_abtb elasticity (a.uu(), b.uu(), c.uu(), mp.uu());
elasticity.solve (lh.u() - a.ub()*uh.b(), -(b.ub()*uh.b()),
uh.set_u(), ph.set_u());
dout << catchmark("inv_lambda") << inv_lambda << endl
<< catchmark("u") << uh
<< catchmark("p") << ph;
}
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