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Commit f73c97a2 authored by incardon's avatar incardon
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Fixing examples Vortex in order to be usefull

parent c75b59d2
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Showing with 21 additions and 18 deletions
example/Numerics/Vortex_in_cell/main_vic_petsc.cpp
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......@@ -122,7 +122,7 @@ float ringr1 = 1.0;
float sigma = 1.0/3.523;
// Reynold number (If you want to use 7500.0 you have to use a grid 1600x400x400)
//float tgtre = 7500.0;
float tgtre = 10.0;
float tgtre = 1000.0;
// Noise factor for the ring vorticity on z
float ringnz = 0.01;
......@@ -250,15 +250,13 @@ void init_ring(grid_type & gr, const Box<3,float> & domain)
float tx = (key.get(x)-2)*gr.spacing(x) + domain.getLow(x);
float ty = (key.get(y)-2)*gr.spacing(y) + domain.getLow(y);
float tz = (key.get(z)-2)*gr.spacing(z) + domain.getLow(z);
float theta1 = atan2((ty-2.5f),(tz-2.5f));
float theta1 = atan2((ty-domain.getHigh(1)/2.0f),(tz-domain.getHigh(2)/2.0f));
float noise = 0.0f;
// for (int kk=1 ; kk < nk; kk++)
// noise = noise + sin(kk*(theta1+2.0f*M_PI*ak[kk])) + cos(kk*(theta1+2.0f*M_PI*bk[kk]));
float rad1r = sqrt((ty-2.5f)*(ty-2.5f) + (tz-2.5f)*(tz-2.5f)) - ringr1*(1.0f + ringnz * noise);
float rad1r = sqrt((ty-domain.getHigh(1)/2.0f)*(ty-domain.getHigh(1)/2.0f) + (tz-domain.getHigh(2)/2.0f)*(tz-domain.getHigh(2)/2.0f)) - ringr1*(1.0f + ringnz * noise);
float rad1t = tx - 1.0f;
float rad1sq = rad1r*rad1r + rad1t*rad1t;
float radstr = -exp(-rad1sq*rinv2)*rinv2*gamma/M_PI;
......@@ -268,7 +266,7 @@ void init_ring(grid_type & gr, const Box<3,float> & domain)
// kill the axis term
float rad1r_ = sqrt((ty-2.5f)*(ty-2.5f) + (tz-2.5f)*(tz-2.5f)) + ringr1*(1.0f + ringnz * noise);
float rad1r_ = sqrt((ty-domain.getHigh(1)/2.0f)*(ty-domain.getHigh(1)/2.0f) + (tz-domain.getHigh(2)/2.0f)*(tz-domain.getHigh(2)/2.0f)) + ringr1*(1.0f + ringnz * noise);
float rad1sqTILDA = rad1sq*rinv2;
radstr = exp(-rad1sq*rinv2)*rinv2*gamma/M_PI;
gr.template get<vorticity>(key_d)[x] = 0.0f;
......@@ -496,11 +494,13 @@ void helmotz_hodge_projection(grid_type & gr, const Box<3,float> & domain, petsc
solver.setSolver(KSPBCGS);
// Set the absolute tolerance to determine that the method is converged
solver.setAbsTol(0.001);
solver.setAbsTol(0.0001);
// Set the maximum number of iterations
solver.setMaxIter(500);
#ifdef USE_MULTIGRID
solver.setPreconditioner(PCHYPRE_BOOMERAMG);
solver.setPreconditionerAMG_nl(6);
solver.setPreconditionerAMG_maxit(1);
......@@ -509,6 +509,9 @@ void helmotz_hodge_projection(grid_type & gr, const Box<3,float> & domain, petsc
solver.setPreconditionerAMG_coarsenNodalType(0);
solver.setPreconditionerAMG_coarsen("HMIS");
#endif
tm_solve.start();
// Give to the solver A and b, return x, the solution
......@@ -855,9 +858,9 @@ template<typename grid> void calc_rhs(grid & g_vort, grid & g_vel, grid & g_dwp)
// calculate several pre-factors for the stencil finite
// difference
float fac1 = 2.0f*nu/(g_vort.spacing(0));
float fac2 = 2.0f*nu/(g_vort.spacing(1));
float fac3 = 2.0f*nu/(g_vort.spacing(2));
float fac1 = 2.0f*nu/(g_vort.spacing(0)*g_vort.spacing(0));
float fac2 = 2.0f*nu/(g_vort.spacing(1)*g_vort.spacing(1));
float fac3 = 2.0f*nu/(g_vort.spacing(2)*g_vort.spacing(2));
float fac4 = 0.5f/(g_vort.spacing(0));
float fac5 = 0.5f/(g_vort.spacing(1));
......@@ -871,10 +874,10 @@ template<typename grid> void calc_rhs(grid & g_vort, grid & g_vel, grid & g_dwp)
{
auto key = it.get();
g_dwp.template get<rhs>(key)[x] = /*fac1*(g_vort.template get<vorticity>(key.move(x,1))[x]+g_vort.template get<vorticity>(key.move(x,-1))[x])+
g_dwp.template get<rhs>(key)[x] = fac1*(g_vort.template get<vorticity>(key.move(x,1))[x]+g_vort.template get<vorticity>(key.move(x,-1))[x])+
fac2*(g_vort.template get<vorticity>(key.move(y,1))[x]+g_vort.template get<vorticity>(key.move(y,-1))[x])+
fac3*(g_vort.template get<vorticity>(key.move(z,1))[x]+g_vort.template get<vorticity>(key.move(z,-1))[x])-
2.0f*(fac1+fac2+fac3)*g_vort.template get<vorticity>(key)[x]+*/
2.0f*(fac1+fac2+fac3)*g_vort.template get<vorticity>(key)[x]+
fac4*g_vort.template get<vorticity>(key)[x]*
(g_vel.template get<velocity>(key.move(x,1))[x] - g_vel.template get<velocity>(key.move(x,-1))[x])+
fac5*g_vort.template get<vorticity>(key)[y]*
......@@ -882,10 +885,10 @@ template<typename grid> void calc_rhs(grid & g_vort, grid & g_vel, grid & g_dwp)
fac6*g_vort.template get<vorticity>(key)[z]*
(g_vel.template get<velocity>(key.move(z,1))[x] - g_vel.template get<velocity>(key.move(z,-1))[x]);
g_dwp.template get<rhs>(key)[y] = /*fac1*(g_vort.template get<vorticity>(key.move(x,1))[y]+g_vort.template get<vorticity>(key.move(x,-1))[y])+
g_dwp.template get<rhs>(key)[y] = fac1*(g_vort.template get<vorticity>(key.move(x,1))[y]+g_vort.template get<vorticity>(key.move(x,-1))[y])+
fac2*(g_vort.template get<vorticity>(key.move(y,1))[y]+g_vort.template get<vorticity>(key.move(y,-1))[y])+
fac3*(g_vort.template get<vorticity>(key.move(z,1))[y]+g_vort.template get<vorticity>(key.move(z,-1))[y])-
2.0f*(fac1+fac2+fac3)*g_vort.template get<vorticity>(key)[y]+*/
2.0f*(fac1+fac2+fac3)*g_vort.template get<vorticity>(key)[y]+
fac4*g_vort.template get<vorticity>(key)[x]*
(g_vel.template get<velocity>(key.move(x,1))[y] - g_vel.template get<velocity>(key.move(x,-1))[y])+
fac5*g_vort.template get<vorticity>(key)[y]*
......@@ -894,10 +897,10 @@ template<typename grid> void calc_rhs(grid & g_vort, grid & g_vel, grid & g_dwp)
(g_vel.template get<velocity>(key.move(z,1))[y] - g_vel.template get<velocity>(key.move(z,-1))[y]);
g_dwp.template get<rhs>(key)[z] = /*fac1*(g_vort.template get<vorticity>(key.move(x,1))[z]+g_vort.template get<vorticity>(key.move(x,-1))[z])+
g_dwp.template get<rhs>(key)[z] = fac1*(g_vort.template get<vorticity>(key.move(x,1))[z]+g_vort.template get<vorticity>(key.move(x,-1))[z])+
fac2*(g_vort.template get<vorticity>(key.move(y,1))[z]+g_vort.template get<vorticity>(key.move(y,-1))[z])+
fac3*(g_vort.template get<vorticity>(key.move(z,1))[z]+g_vort.template get<vorticity>(key.move(z,-1))[z])-
2.0f*(fac1+fac2+fac3)*g_vort.template get<vorticity>(key)[z]+*/
2.0f*(fac1+fac2+fac3)*g_vort.template get<vorticity>(key)[z]+
fac4*g_vort.template get<vorticity>(key)[x]*
(g_vel.template get<velocity>(key.move(x,1))[z] - g_vel.template get<velocity>(key.move(x,-1))[z])+
fac5*g_vort.template get<vorticity>(key)[y]*
......@@ -1169,7 +1172,7 @@ int main(int argc, char* argv[])
// Domain, a rectangle
// For the grid 1600x400x400 use
// Box<3,float> domain({0.0,0.0,0.0},{22.0,5.57,5.57});
Box<3,float> domain({0.0,0.0,0.0},{11.0,5.57,5.57});
Box<3,float> domain({0.0,0.0,0.0},{3.57,3.57,3.57});
// Ghost (Not important in this case but required)
Ghost<3,long int> g(2);
......@@ -1177,7 +1180,7 @@ int main(int argc, char* argv[])
// Grid points on x=128 y=64 z=64
// if we use Re = 7500
// long int sz[] = {1600,400,400};
long int sz[] = {128,64,64};
long int sz[] = {96,96,96};
size_t szu[] = {(size_t)sz[0],(size_t)sz[1],(size_t)sz[2]};
periodicity<3> bc = {{PERIODIC,PERIODIC,PERIODIC}};
......
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