jakob.schratter/SciFEM-Project_CoffeeMugSimulation_Celebic-Schratter
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

fixed robin BC

Browse source
This commit is contained in:
jakob.schratter 2026-01-25 17:00:45 +01:00
commit bbceb5cf06
8 changed files with 47974 additions and 1832 deletions
Download patch file Download diff file Expand all files Collapse all files

6
mgrid_2/main.cpp
View file

@ -30,7 +30,7 @@ int main(int argc, char **argv )
// Parameteres
// ##########################################
double dt = 1.0; // time step
double dt = 1.0; // time step
int steps = 20; // number of time iterations
double u0_mug = 18.0;
@ -45,14 +45,14 @@ int main(int argc, char **argv )
// Initializing FEM matrix !pattern! (only zero entries now)
FEM_Matrix SK(mesh_c); // CRS matrix
//SK.writeBinary("sparseMatrix.bin");
// SK.Debug();
//SK.Debug();
vector<double> fv(SK.Nrows(), 0.0);
SK.CalculateRHS(fv, [](double x, double y) {return 0;}); // rhs (f=0)
SK.CalculateLaplace_mult(fv); // stiffness matrix (+K)
SK.AddMass_mult(fv, 1.0/dt); // add mass matrix (+M/dt)
// SK.ApplyRobinBC_mult(fv, u_out); // apply Robin-bnd (+C = +F)
SK.ApplyRobinBC_mult(fv, u_out); // apply Robin-bnd (+C = +F)
// SK = M/dt + K + C = F
// SK.Debug();