Rheolef  7.2
an efficient C++ finite element environment
 
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helmholtz_band.cc
Go to the documentation of this file.
1
25#include "rheolef.h"
26using namespace std;
27using namespace rheolef;
28#include "sphere.icc"
29int main (int argc, char**argv) {
30 environment rheolef(argc, argv);
31 geo lambda (argv[1]);
32 size_t d = lambda.dimension();
33 space Xh (lambda, "P1");
34 field phi_h = lazy_interpolate(Xh, phi);
35 band gamma_h (phi_h);
36 field phi_h_band = phi_h [gamma_h.band()];
37 space Bh (gamma_h.band(), "P1");
38 Bh.block ("isolated");
39 Bh.unblock ("zero");
40 trial u (Bh); test v (Bh);
41 form a = lazy_integrate (gamma_h, u*v + dot(grad_s(u),grad_s(v)));
42 field lh = lazy_integrate (gamma_h, f(d)*v);
43 vector<field> b (gamma_h.n_connected_component());
44 vector<Float> z (gamma_h.n_connected_component(), 0);
45 for (size_t i = 0; i < b.size(); i++) {
46 const domain& cci = gamma_h.band() ["cc"+to_string(i)];
47 field phi_h_cci (Bh, 0);
48 phi_h_cci [cci] = phi_h_band [cci];
49 b[i] = phi_h_cci;
50 }
51 form A = {{ a, trans(b) },
52 { b, 0 }};
53 field Fh = { lh, z };
54 A.set_symmetry(true);
55 problem pa (A);
56 field Uh (Fh.get_space(), 0);
57 pa.solve (Fh, Uh);
58 dout << catchmark("phi") << phi_h
59 << catchmark("u") << Uh[0];
60}
field lh(Float epsilon, Float t, const test &v)
see the band page for the full documentation
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
int main()
Definition field2bb.cc:58
This file is part of Rheolef.
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_s(const Expr &expr)
grad_s(uh): see the expression page for the full documentation
field_basic< T, M > lazy_interpolate(const space_basic< T, M > &X2h, const field_basic< T, M > &u1h)
see the interpolate page for the full documentation
Definition field.h:871
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
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 level set function for the sphere geometry.
Definition cavity_dg.h:29
Definition phi.h:25
Definition leveque.h:25