void Computation::computeNewVelocities(GridFunction& u, GridFunction& v,
GridFunction& f, GridFunction& g, GridFunction& p, RealType deltaT) {
GridFunction branch_1(p.griddimension);
MultiIndexType begin, end;
begin[0] = 1;
end[0] = u.griddimension[0] - 3;
begin[1] = 1;
end[1] = u.griddimension[1] - 2;
// u Update
PointType delta;
delta[0] = SimIO.para.deltaX;
delta[1] = SimIO.para.deltaY;
Px(branch_1, p, delta);
f.AddToGridFunction(begin, end, -1.0 * deltaT, branch_1);
u.SetGridFunction(begin, end, 1.0, f);
// v Update
begin[0] = 1;
end[0] = v.griddimension[0] - 2;
begin[1] = 1;
end[1] = v.griddimension[1] - 3;
GridFunction branch_2(p.griddimension);
Py(branch_2, p, delta);
g.AddToGridFunction(begin, end, -1.0 * deltaT, branch_2);
v.SetGridFunction(begin, end, 1.0, g);
}
void Computation::setBoundaryTN(GridFunction& T, RealType (*TO)(RealType),
RealType (*TU)(RealType), RealType (*TL)(RealType),
RealType (*TR)(RealType)) {
MultiIndexType begin, end;
// T_i,0
begin[0] = 1;
end[0] = T.griddimension[0] - 2;
begin[1] = 0;
end[1] = 0;
MultiIndexType Offset;
Offset[0] = 0;
Offset[1] = 1;
T.SetGridFunction(begin, end, TU, false, SimIO.para.deltaX);
T.ScaleGridFunction(begin, end, SimIO.para.deltaY);
T.AddToGridFunction(begin, end, 1.0, T, Offset);
// T_i,jmax+1
begin[0] = 1;
end[0] = T.griddimension[0] - 2;
begin[1] = T.griddimension[1] - 1;
end[1] = T.griddimension[1] - 1;
//MultiIndexType Offset;
Offset[0] = 0;
Offset[1] = -1;
T.SetGridFunction(begin, end, TO, false, SimIO.para.deltaX);
T.ScaleGridFunction(begin, end, SimIO.para.deltaY);
T.AddToGridFunction(begin, end, 1.0, T, Offset);
}
void Computation::setBoundaryG(GridFunction& g, GridFunction& v) {
MultiIndexType begin, end;
begin[0] = 1;
end[0] = g.griddimension[0] - 2;
begin[1] = 0;
end[1] = 0;
g.SetGridFunction(begin, end, 1.0, v);
begin[0] = 1;
end[0] = g.griddimension[0] - 2;
begin[1] = g.griddimension[1] - 2;
end[1] = g.griddimension[1] - 2;
g.SetGridFunction(begin, end, 1.0, v);
}
void Computation::setBoundaryF(GridFunction& f, GridFunction& u) {
MultiIndexType begin, end;
begin[0] = 0;
end[0] = 0;
begin[1] = 1;
end[1] = f.griddimension[1] - 2;
f.SetGridFunction(begin, end, 1.0, u);
// F_iMax,j=u_iMax+1,j
begin[0] = f.griddimension[0] - 2;
end[0] = f.griddimension[0] - 2;
begin[1] = 1;
end[1] = f.griddimension[1] - 2;
f.SetGridFunction(begin, end, 1.0, u);
}
void Stencil::ApplyUVxStencilOperator(const MultiIndexType& gridreadbegin,
const MultiIndexType& gridreadend,
const MultiIndexType& gridwritebegin,
const MultiIndexType& gridwriteend,
const GridFunctionType& sourcegridfunctionU,
const GridFunctionType& sourcegridfunctionV,
GridFunction& imagegridfunction,
RealType alpha){
RealType tmp;
for (IndexType i=gridwritebegin[0]; i<=gridwriteend[0]; i++){
for (IndexType j=gridwritebegin[1]; j<=gridwriteend[1]; j++){
tmp = 0.25*((sourcegridfunctionU[i][j]+sourcegridfunctionU[i][j+1])*
(sourcegridfunctionV[i][j]+sourcegridfunctionV[i+1][j])-
(sourcegridfunctionU[i-1][j]+sourcegridfunctionU[i-1][j+1])*
(sourcegridfunctionV[i-1][j]+sourcegridfunctionV[i][j])
)+
alpha*0.25*(abs(sourcegridfunctionU[i][j]+sourcegridfunctionU[i][j+1])*
(sourcegridfunctionV[i][j]-sourcegridfunctionV[i+1][j])-
abs(sourcegridfunctionU[i-1][j]+sourcegridfunctionU[i-1][j+1])*
(sourcegridfunctionV[i-1][j]-sourcegridfunctionV[i][j])
);
imagegridfunction.SetGridFunction(i,j,tmp/h[0]);
}
}
}
void Computation::setBoundaryP(GridFunction& p) {
MultiIndexType begin, end;
if (SimIO.para.world_rank == 0) {
// p_0,j = p_1,j
begin[0] = 0;
end[0] = 0;
begin[1] = 1;
end[1] = p.griddimension[1] - 2;
MultiIndexType Offset;
Offset[0] = 1;
Offset[1] = 0;
p.SetGridFunction(begin, end, 1.0, Offset);
}
if (SimIO.para.world_rank == 1) {
// p_iMax+1,j = p_iMax,j
begin[0] = p.griddimension[0] - 1;
end[0] = p.griddimension[0] - 1;
begin[1] = 1;
end[1] = p.griddimension[1] - 2;
MultiIndexType Offset;
Offset[0] = -1;
Offset[1] = 0;
p.SetGridFunction(begin, end, 1.0, Offset);
}
// p_i,0 = p_i,1
begin[0] = 1;
end[0] = p.griddimension[0] - 2;
begin[1] = 0;
end[1] = 0;
MultiIndexType Offset;
Offset[0] = 0;
Offset[1] = 1;
p.SetGridFunction(begin, end, 1.0, Offset);
// p_i,jMax+1 = p_i,jMax
begin[0] = 1;
end[0] = p.griddimension[0] - 2;
begin[1] = p.griddimension[1] - 1;
end[1] = p.griddimension[1] - 1;
Offset[0] = 0;
Offset[1] = -1;
p.SetGridFunction(begin, end, 1.0, Offset);
}
void Computation::setBoundaryV(GridFunction& v) {
MultiIndexType begin, end;
// v_i,0 = 0
begin[0] = 1;
end[0] = v.griddimension[0] - 2;
begin[1] = 0;
end[1] = 0;
v.SetGridFunction(begin, end, 0.0);
// v_i,jMax =0
begin[0] = 1;
end[0] = v.griddimension[0] - 2;
begin[1] = v.griddimension[1] - 2;
end[1] = v.griddimension[1] - 2;
v.SetGridFunction(begin, end, 0.0);
if (SimIO.para.world_rank == 0) {
// v_0,j = -v_1,j
begin[0] = 0;
end[0] = 0;
begin[1] = 1;
end[1] = v.griddimension[1] - 2;
MultiIndexType Offset;
Offset[0] = 1;
Offset[1] = 0;
v.SetGridFunction(begin, end, -1.0, Offset);
}
if (SimIO.para.world_rank == 1) {
// v_iMax+1,j = -v_iMax,j
begin[0] = v.griddimension[0] - 1;
end[0] = v.griddimension[0] - 1;
begin[1] = 1;
end[1] = v.griddimension[1] - 2;
MultiIndexType Offset;
Offset[0] = -1;
Offset[1] = 0;
v.SetGridFunction(begin, end, -1.0, Offset);
}
}
void Computation::setBoundaryU(GridFunction& u) {
MultiIndexType begin, end;
if (SimIO.para.world_rank == 0) {
// u_0,j = 0
begin[0] = 0;
end[0] = 0;
begin[1] = 1;
end[1] = u.griddimension[1] - 2;
u.SetGridFunction(begin, end, 0.0);
}
if (SimIO.para.world_rank == 1) {
//u_iMax,j = 0
begin[0] = u.griddimension[0] - 2;
end[0] = u.griddimension[0] - 2;
begin[1] = 1;
end[1] = u.griddimension[1] - 2;
u.SetGridFunction(begin, end, 0.0);
}
// u_i,0
begin[0] = 1;
end[0] = u.griddimension[0] - 2;
begin[1] = 0;
end[1] = 0;
MultiIndexType Offset;
Offset[0] = 0;
Offset[1] = 1;
u.SetGridFunction(begin, end, -1.0, Offset);
// u_i,jMax+1
begin[0] = 1;
end[0] = u.griddimension[0] - 2;
begin[1] = u.griddimension[1] - 1;
end[1] = u.griddimension[1] - 1;
Offset[0] = 0;
Offset[1] = -1;
u.SetGridFunction(begin, end, -1.0, Offset);
//u.SetGridFunction(begin, end, -1.0, u, Offset, 2.0);
}
void Stencil::ApplyStencilOperator(const MultiIndexType& gridreadbegin,
const MultiIndexType& gridreadend,
const MultiIndexType& gridwritebegin,
const MultiIndexType& gridwriteend,
const GridFunctionType& sourcegridfunction,
GridFunction& imagegridfunction){
// Berechne die Ableitungen
// (0,0) ist bei allen allen drei Matrtzen (Stencil, sourcegrid, imagegrid) oben links
RealType tmp;
for (IndexType i=gridwritebegin[0]; i<=gridwriteend[0]; i++){
for (IndexType j=gridwritebegin[1]; j<=gridwriteend[1]; j++){
tmp = 0.0;
for(IndexType k=0; k<3; k++){
for(IndexType l=0; l<3; l++){
tmp = tmp + sourcegridfunction[i+k-1][j+l-1]*stencil[k][l];
}
}
imagegridfunction.SetGridFunction(i,j,tmp);
}
}
}
void Computation::setBoundaryTD(GridFunction& T, RealType (*TO)(RealType),
RealType (*TU)(RealType), RealType (*TL)(RealType),
RealType (*TR)(RealType)) {
MultiIndexType begin, end;
if (SimIO.para.world_rank == 0) {
// p_0,j = p_1,j
begin[0] = 0;
end[0] = 0;
begin[1] = 1;
end[1] = T.griddimension[1] - 2;
T.SetGridFunction(begin, end, TL, true, SimIO.para.deltaY);
T.ScaleGridFunction(begin, end, 2.0);
MultiIndexType Offset;
Offset[0] = 1;
Offset[1] = 0;
T.AddToGridFunction(begin, end, -1.0, T, Offset);
}
if (SimIO.para.world_rank == 1) {
// T_imax+1,j
begin[0] = T.griddimension[0] - 1;
end[0] = T.griddimension[0] - 1;
begin[1] = 1;
end[1] = T.griddimension[1] - 2;
MultiIndexType Offset;
Offset[0] = -1;
Offset[1] = 0;
T.SetGridFunction(begin, end, TR, true, SimIO.para.deltaY);
T.ScaleGridFunction(begin, end, 2.0);
T.AddToGridFunction(begin, end, -1.0, T, Offset);
}
/*
// T_i,0
begin[0] = 1;
end[0] = T.griddimension[0] - 2;
begin[1] = 0;
end[1] = 0;
MultiIndexType Offset;
Offset[0] = 0;
Offset[1] = 1;
T.SetGridFunction(begin, end, TU, false, SimIO.para.deltaX);
T.ScaleGridFunction(begin, end, 2.0);
T.AddToGridFunction(begin, end, -1.0, T, Offset);
// T_i,jmax+1
begin[0] = 1;
end[0] = T.griddimension[0] - 2;
begin[1] = T.griddimension[1] - 1;
end[1] = T.griddimension[1] - 1;
MultiIndexType Offset;
Offset[0] = 0;
Offset[1] = -1;
T.SetGridFunction(begin, end, TO, false, SimIO.para.deltaX);
T.ScaleGridFunction(begin, end, 2.0);
T.AddToGridFunction(begin, end, -1.0, T, Offset);*/
}
