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advec_mom_kernel_c.c
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advec_mom_kernel_c.c
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/*Crown Copyright 2012 AWE.
*
* This file is part of CloverLeaf.
*
* CloverLeaf is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* CloverLeaf is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* CloverLeaf. If not, see http://www.gnu.org/licenses/. */
/**
* @brief C momentum advection kernel
* @author Wayne Gaudin
* @details Performs a second order advective remap on the vertex momentum
* using van-Leer limiting and directional splitting.
* Note that although pre_vol is only set and not used in the update, please
* leave it in the method.
*/
#include <stdio.h>
#include <stdlib.h>
#include "ftocmacros.h"
#include <math.h>
void advec_mom_kernel_c_(int *xmin,int *xmax,int *ymin,int *ymax,
double *vel1,
double *mass_flux_x,
double *vol_flux_x,
double *mass_flux_y,
double *vol_flux_y,
double *volume,
double *density1,
double *node_flux,
double *node_mass_post,
double *node_mass_pre,
double *mom_flux,
double *pre_vol,
double *post_vol,
double *celldx,
double *celldy,
int *whch_vl,
int *swp_nmbr,
int *drctn)
{
int x_min=*xmin;
int x_max=*xmax;
int y_min=*ymin;
int y_max=*ymax;
int which_vel=*whch_vl;
int sweep_number=*swp_nmbr;
int direction=*drctn;
int j,k,mom_sweep;
int upwind,donor,downwind,dif;
double sigma,wind,width;
double vdiffuw,vdiffdw,auw,adw,limiter;
double advec_vel_s;
mom_sweep=direction+2*(sweep_number-1);
if(mom_sweep==1){
for (k=y_min-2;k<=y_max+2;k++) {
#pragma ivdep
for (j=x_min-2;j<=x_max+2;j++) {
post_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=volume[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]
+vol_flux_y[FTNREF2D(j ,k+1,x_max+4,x_min-2,y_min-2)]
-vol_flux_y[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)];
pre_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=post_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
+vol_flux_x[FTNREF2D(j+1,k ,x_max+5,x_min-2,y_min-2)]
-vol_flux_x[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)];
}
}
} else if(mom_sweep==2){
for (k=y_min-2;k<=y_max+2;k++) {
#pragma ivdep
for (j=x_min-2;j<=x_max+2;j++) {
post_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=volume[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]
+vol_flux_x[FTNREF2D(j+1,k ,x_max+5,x_min-2,y_min-2)]
-vol_flux_x[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)];
pre_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=post_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
+vol_flux_y[FTNREF2D(j ,k+1,x_max+4,x_min-2,y_min-2)]
-vol_flux_y[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)];
}
}
} else if(mom_sweep==3){
for (k=y_min-2;k<=y_max+2;k++) {
#pragma ivdep
for (j=x_min-2;j<=x_max+2;j++) {
post_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=volume[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)];
pre_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=post_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
+vol_flux_y[FTNREF2D(j ,k+1,x_max+4,x_min-2,y_min-2)]
-vol_flux_y[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)];
}
}
} else if(mom_sweep==4){
for (k=y_min-2;k<=y_max+2;k++) {
#pragma ivdep
for (j=x_min-2;j<=x_max+2;j++) {
post_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=volume[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)];
pre_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=post_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
+vol_flux_x[FTNREF2D(j+1,k ,x_max+5,x_min-2,y_min-2)]
-vol_flux_x[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)];
}
}
}
if(direction==1) {
for (k=y_min;k<=y_max+1;k++) {
#pragma ivdep
for (j=x_min-2;j<=x_max+2;j++) {
node_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=0.25
*(mass_flux_x[FTNREF2D(j ,k-1,x_max+5,x_min-2,y_min-2)]
+mass_flux_x[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
+mass_flux_x[FTNREF2D(j+1,k-1,x_max+5,x_min-2,y_min-2)]
+mass_flux_x[FTNREF2D(j+1,k ,x_max+5,x_min-2,y_min-2)]);
}
}
for (k=y_min;k<=y_max+1;k++) {
#pragma ivdep
for (j=x_min-1;j<=x_max+2;j++) {
node_mass_post[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=0.25
*(density1[FTNREF2D(j ,k-1,x_max+4,x_min-2,y_min-2)]
*post_vol[FTNREF2D(j ,k-1,x_max+5,x_min-2,y_min-2)]
+density1[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]
*post_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
+density1[FTNREF2D(j-1,k-1,x_max+4,x_min-2,y_min-2)]
*post_vol[FTNREF2D(j-1,k-1,x_max+5,x_min-2,y_min-2)]
+density1[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)]
*post_vol[FTNREF2D(j-1,k ,x_max+5,x_min-2,y_min-2)]);
}
}
for (k=y_min;k<=y_max+1;k++) {
#pragma ivdep
for (j=x_min-1;j<=x_max+2;j++) {
node_mass_pre[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=node_mass_post[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
-node_flux[FTNREF2D(j-1,k ,x_max+5,x_min-2,y_min-2)]+node_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)];
}
}
for (k=y_min;k<=y_max+1;k++) {
for (j=x_min-1;j<=x_max+1;j++) {
if(node_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]<0.0){
upwind=j+2;
donor=j+1;
downwind=j;
dif=donor;
}
else{
upwind=j-1;
donor=j;
downwind=j+1;
dif=upwind;
}
sigma=fabs(node_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)])/(node_mass_pre[FTNREF2D(donor,k ,x_max+5,x_min-2,y_min-2)]);
width=celldx[FTNREF1D(j,x_min-2)];
vdiffuw=vel1[FTNREF2D(donor,k ,x_max+5,x_min-2,y_min-2)]-vel1[FTNREF2D(upwind,k ,x_max+5,x_min-2,y_min-2)];
vdiffdw=vel1[FTNREF2D(downwind,k ,x_max+5,x_min-2,y_min-2)]-vel1[FTNREF2D(donor,k ,x_max+5,x_min-2,y_min-2)];
limiter=0.0;
if(vdiffuw*vdiffdw>0.0){
auw=fabs(vdiffuw);
adw=fabs(vdiffdw);
wind=1.0;
if(vdiffdw<=0.0) wind=-1.0;
limiter=wind*MIN(width*((2.0-sigma)*adw/width+(1.0+sigma)*auw/celldx[FTNREF1D(dif,x_min-2)])/6.0,MIN(auw,adw));
}
advec_vel_s=vel1[FTNREF2D(donor,k ,x_max+5,x_min-2,y_min-2)]+(1.0-sigma)*limiter;
mom_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=advec_vel_s
*node_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)];
}
}
for (k=y_min;k<=y_max+1;k++) {
#pragma ivdep
for (j=x_min;j<=x_max+1;j++) {
vel1[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=(vel1[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
*node_mass_pre[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
+mom_flux[FTNREF2D(j-1,k ,x_max+5,x_min-2,y_min-2)]
-mom_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)])
/node_mass_post[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)];
}
}
}
else if(direction==2){
for (k=y_min-2;k<=y_max+2;k++) {
#pragma ivdep
for (j=x_min;j<=x_max+1;j++) {
node_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=0.25
*(mass_flux_y[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)]
+mass_flux_y[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]
+mass_flux_y[FTNREF2D(j-1,k+1,x_max+4,x_min-2,y_min-2)]
+mass_flux_y[FTNREF2D(j ,k+1,x_max+4,x_min-2,y_min-2)]);
}
}
for (k=y_min-1;k<=y_max+2;k++) {
#pragma ivdep
for (j=x_min;j<=x_max+1;j++) {
node_mass_post[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=0.25
*(density1[FTNREF2D(j ,k-1,x_max+4,x_min-2,y_min-2)]
*post_vol[FTNREF2D(j ,k-1,x_max+5,x_min-2,y_min-2)]
+density1[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]
*post_vol[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
+density1[FTNREF2D(j-1,k-1,x_max+4,x_min-2,y_min-2)]
*post_vol[FTNREF2D(j-1,k-1,x_max+5,x_min-2,y_min-2)]
+density1[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)]
*post_vol[FTNREF2D(j-1,k ,x_max+5,x_min-2,y_min-2)]);
}
}
for (k=y_min-1;k<=y_max+2;k++) {
#pragma ivdep
for (j=x_min;j<=x_max+1;j++) {
node_mass_pre[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=node_mass_post[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
-node_flux[FTNREF2D(j ,k-1,x_max+5,x_min-2,y_min-2)]+node_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)];
}
}
for (k=y_min-1;k<=y_max+1;k++) {
for (j=x_min;j<=x_max+1;j++) {
if(node_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]<0.0){
upwind=k+2;
donor=k+1;
downwind=k;
dif=donor;
}
else{
upwind=k-1;
donor=k;
downwind=k+1;
dif=upwind;
}
sigma=fabs(node_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)])/(node_mass_pre[FTNREF2D(j ,donor,x_max+5,x_min-2,y_min-2)]);
width=celldy[FTNREF1D(k,y_min-2)];
vdiffuw=vel1[FTNREF2D(j ,donor,x_max+5,x_min-2,y_min-2)]-vel1[FTNREF2D(j ,upwind,x_max+5,x_min-2,y_min-2)];
vdiffdw=vel1[FTNREF2D(j ,downwind ,x_max+5,x_min-2,y_min-2)]-vel1[FTNREF2D(j ,donor,x_max+5,x_min-2,y_min-2)];
limiter=0.0;
if(vdiffuw*vdiffdw>0.0){
auw=fabs(vdiffuw);
adw=fabs(vdiffdw);
wind=1.0;
if(vdiffdw<=0.0) wind=-1.0;
limiter=wind*MIN(width*((2.0-sigma)*adw/width+(1.0+sigma)*auw/celldy[FTNREF1D(dif,y_min-2)])/6.0,MIN(auw,adw));
}
advec_vel_s=vel1[FTNREF2D(j ,donor,x_max+5,x_min-2,y_min-2)]+(1.0-sigma)*limiter;
mom_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=advec_vel_s
*node_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)];
}
}
for (k=y_min;k<=y_max+1;k++) {
#pragma ivdep
for (j=x_min;j<=x_max+1;j++) {
vel1[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=(vel1[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
*node_mass_pre[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
+mom_flux[FTNREF2D(j ,k-1,x_max+5,x_min-2,y_min-2)]
-mom_flux[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)])
/node_mass_post[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)];
}
}
}
}