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accelerate_kernel_c.c
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accelerate_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 acceleration kernel
* @author Wayne Gaudin
* @details The pressure and viscosity gradients are used to update the
* velocity field.
*/
#include <stdio.h>
#include <stdlib.h>
#include "ftocmacros.h"
#include <math.h>
void accelerate_kernel_c_(int *xmin,int *xmax,int *ymin,int *ymax,
double *dbyt,
double *xarea,
double *yarea,
double *volume,
double *density0,
double *pressure,
double *viscosity,
double *xvel0,
double *yvel0,
double *xvel1,
double *yvel1,
double *stepbymass)
{
int x_min=*xmin;
int x_max=*xmax;
int y_min=*ymin;
int y_max=*ymax;
double dt=*dbyt;
int j,k,err;
double nodal_mass;
#pragma omp parallel
{
#pragma omp for private(nodal_mass,j)
for (k=y_min;k<=y_max+1;k++) {
#pragma ivdep
for (j=x_min;j<=x_max+1;j++) {
nodal_mass=(density0[FTNREF2D(j-1,k-1,x_max+4,x_min-2,y_min-2)]*volume[FTNREF2D(j-1,k-1,x_max+4,x_min-2,y_min-2)]
+density0[FTNREF2D(j ,k-1,x_max+4,x_min-2,y_min-2)]*volume[FTNREF2D(j ,k-1,x_max+4,x_min-2,y_min-2)]
+density0[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]*volume[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]
+density0[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)]*volume[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)])
*0.25;
stepbymass[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=0.5*dt/nodal_mass;
}
}
#pragma omp for private(j)
for (k=y_min;k<=y_max+1;k++) {
#pragma ivdep
for (j=x_min;j<=x_max+1;j++) {
xvel1[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=xvel0[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
-stepbymass[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
*(xarea[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
*(pressure[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]-pressure[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)])
+xarea[FTNREF2D(j ,k-1,x_max+5,x_min-2,y_min-2)]
*(pressure[FTNREF2D(j ,k-1,x_max+4,x_min-2,y_min-2)]-pressure[FTNREF2D(j-1,k-1,x_max+4,x_min-2,y_min-2)]));
}
}
#pragma omp for private(j)
for (k=y_min;k<=y_max+1;k++) {
#pragma ivdep
for (j=x_min;j<=x_max+1;j++) {
yvel1[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=yvel0[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
-stepbymass[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
*(yarea[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]
*(pressure[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]-pressure[FTNREF2D(j ,k-1,x_max+4,x_min-2,y_min-2)])
+yarea[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)]
*(pressure[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)]-pressure[FTNREF2D(j-1,k-1,x_max+4,x_min-2,y_min-2)]));
}
}
#pragma omp for private(j)
for (k=y_min;k<=y_max+1;k++) {
#pragma ivdep
for (j=x_min;j<=x_max+1;j++) {
xvel1[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=xvel1[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
-stepbymass[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
*(xarea[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
*(viscosity[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]-viscosity[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)])
+xarea[FTNREF2D(j ,k-1,x_max+5,x_min-2,y_min-2)]
*(viscosity[FTNREF2D(j ,k-1,x_max+4,x_min-2,y_min-2)]-viscosity[FTNREF2D(j-1,k-1,x_max+4,x_min-2,y_min-2)]));
}
}
#pragma omp for private(j)
for (k=y_min;k<=y_max+1;k++) {
#pragma ivdep
for (j=x_min;j<=x_max+1;j++) {
yvel1[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]=yvel1[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
-stepbymass[FTNREF2D(j ,k ,x_max+5,x_min-2,y_min-2)]
*(yarea[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]
*(viscosity[FTNREF2D(j ,k ,x_max+4,x_min-2,y_min-2)]-viscosity[FTNREF2D(j ,k-1,x_max+4,x_min-2,y_min-2)])
+yarea[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)]
*(viscosity[FTNREF2D(j-1,k ,x_max+4,x_min-2,y_min-2)]-viscosity[FTNREF2D(j-1,k-1,x_max+4,x_min-2,y_min-2)]));
}
}
}
}