Rheolef  7.2
an efficient C++ finite element environment
 
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reconstruction_hho_v2.cc
Go to the documentation of this file.
1
25#include "rheolef.h"
26using namespace rheolef;
27using namespace std;
28#include "sinusprod.h"
29#include "diffusion_isotropic.h"
30int main(int argc, char**argv) {
31 environment rheolef (argc, argv);
32 geo omega (argv[1]);
33 string Pkd = (argc > 2) ? argv[2] : "P0",
34 Pld = (argc > 3) ? argv[3] : Pkd;
35 space Xh (omega, Pld),
36 Mh (omega["sides"], Pkd);
37 size_t k = Xh.degree(), l = Xh.degree(), d = omega.dimension();
38 check_macro(l == k-1 || l == k || l == k+1,
39 "invalid (k,l) = ("<<k<<","<<l<<")");
40 space Xhs(omega, "P"+to_string(k+1)+"d"),
41 Zh (omega, "P0");
42 trial u(Xh), lambda(Mh), us(Xhs), zeta (Zh);
43 test v(Xh), mu (Mh), vs(Xhs), xi (Zh);
44 form as = lazy_integrate (dot(grad_h(us),A(d)*grad_h(vs)));
45 form bs = lazy_integrate (us*xi);
46 auto cs = lazy_integrate (pow(h_local(),2)*zeta*xi);
47 auto m = lazy_integrate (u*v);
48 form ms = lazy_integrate (lambda*mu);
49 form inv_m = inv(m);
50 form inv_cs = inv(cs);
51 form ss = as + trans(bs)*inv_cs*bs;
52 field llh = integrate(u_exact(d)*v);
53 field rhs = integrate(u_exact(d)*mu);
54 field pi_Xh_u = inv_m*llh;
55 field pi_Mh_lambda(Mh);
56 problem pms (ms);
57 pms.solve (rhs, pi_Mh_lambda);
58 field lh = integrate (dot(grad_h(pi_Xh_u),A(d)*grad_h(vs))
59 + on_local_sides((pi_Mh_lambda-pi_Xh_u)
60 *dot(normal(),A(d)*grad_h(vs))));
61 field kh = integrate (pi_Xh_u*xi);
62 field rh = lh + bs.trans_mult(inv_cs*kh);
63 problem pss (ss);
64 field us_h (Xhs, 0);
65 pss.solve (rh, us_h);
66 field zeta_h = inv_cs*(bs*us_h - kh);
67 dout << catchmark("us") << us_h
68 << catchmark("zeta") << zeta_h;
69}
field lh(Float epsilon, Float t, const test &v)
see the field page for the full documentation
see the form page for the full documentation
see the geo page for the full documentation
see the problem page for the full documentation
see the catchmark page for the full documentation
Definition catchmark.h:67
see the environment page for the full documentation
see the space page for the full documentation
see the test page for the full documentation
see the test page for the full documentation
Tensor diffusion – isotropic case.
int main()
Definition field2bb.cc:58
check_macro(expr1.have_homogeneous_space(Xh1), "dual(expr1,expr2); expr1 should have homogeneous space. HINT: use dual(interpolate(Xh, expr1),expr2)")
This file is part of Rheolef.
tensor_basic< T > inv(const tensor_basic< T > &a, size_t d)
Definition tensor.cc:219
space_mult_list< T, M > pow(const space_basic< T, M > &X, size_t n)
Definition space_mult.h:120
std::enable_if< details::has_field_rdof_interface< Expr >::value, details::field_expr_v2_nonlinear_terminal_field< typenameExpr::scalar_type, typenameExpr::memory_type, details::differentiate_option::gradient > >::type grad_h(const Expr &expr)
grad_h(uh): see the expression page for the full documentation
details::field_expr_v2_nonlinear_terminal_function< details::normal_pseudo_function< Float > > normal()
normal: see the expression page for the full documentation
std::enable_if< details::is_field_expr_v2_nonlinear_arg< Expr >::value &&!is_undeterminated< Result >::value, Result >::type integrate(const geo_basic< T, M > &omega, const Expr &expr, const integrate_option &iopt, Result dummy=Result())
see the integrate page for the full documentation
Definition integrate.h:211
std::enable_if< details::is_field_expr_v2_variational_arg< Expr >::value, details::field_expr_quadrature_on_sides< Expr > >::type on_local_sides(const Expr &expr)
on_local_sides(expr): see the expression page for the full documentation
std::enable_if< details::is_field_expr_quadrature_arg< Expr >::value, details::field_lazy_terminal_integrate< Expr > >::type lazy_integrate(const typename Expr::geo_type &domain, const Expr &expr, const integrate_option &iopt=integrate_option())
see the integrate page for the full documentation
details::field_expr_v2_nonlinear_terminal_function< details::h_local_pseudo_function< Float > > h_local()
h_local: see the expression page for the full documentation
rheolef::std enable_if ::type dot const Expr1 expr1, const Expr2 expr2 dot(const Expr1 &expr1, const Expr2 &expr2)
csr< T, sequential > trans(const csr< T, sequential > &a)
trans(a): see the form page for the full documentation
Definition csr.h:455
STL namespace.
rheolef - reference manual
The sinus product function.
Definition leveque.h:25