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pdv_knl.cl
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pdv_knl.cl
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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 OCL device-side PdV kernels
* @author Andrew Mallinson, David Beckingsale, Wayne Gaudin
* @details Calculates the change in energy and density in a cell using the
* change on cell volume due to the velocity gradients in a cell. The time
* level of the velocity data depends on whether it is invoked as the
* predictor or corrector.
*/
#include "ocl_knls.h"
__kernel void pdv_correct_ocl_kernel(
const double dt,
__global const double * restrict xarea,
__global const double * restrict yarea,
__global const double * restrict volume,
__global const double * restrict density0,
__global double * restrict density1,
__global const double * restrict energy0,
__global double * restrict energy1,
__global const double * restrict pressure,
__global const double * restrict viscosity,
__global const double * restrict xvel0,
__global const double * restrict xvel1,
__global const double * restrict yvel0,
__global const double * restrict yvel1)
{
double recip_volume,energy_change,min_cell_volume,right_flux,left_flux,top_flux,bottom_flux,total_flux,volume_change;
int j = get_global_id(0);
int k = get_global_id(1);
if((j>=2) && (j<=XMAXPLUSONE) && (k>=2) && (k<=YMAXPLUSONE)) {
left_flux= (xarea[ARRAYXY(j ,k ,XMAXPLUSFIVE)])
*(xvel0[ARRAYXY(j ,k ,XMAXPLUSFIVE)]
+xvel0[ARRAYXY(j ,k+1,XMAXPLUSFIVE)]
+xvel0[ARRAYXY(j ,k ,XMAXPLUSFIVE)]
+xvel0[ARRAYXY(j ,k+1,XMAXPLUSFIVE)])
*0.25*dt*0.5;
right_flux= (xarea[ARRAYXY(j+1,k ,XMAXPLUSFIVE)])
*(xvel0[ARRAYXY(j+1,k ,XMAXPLUSFIVE)]
+xvel0[ARRAYXY(j+1,k+1,XMAXPLUSFIVE)]
+xvel0[ARRAYXY(j+1,k ,XMAXPLUSFIVE)]
+xvel0[ARRAYXY(j+1,k+1,XMAXPLUSFIVE)])
*0.25*dt*0.5;
bottom_flux=(yarea[ARRAYXY(j ,k ,XMAXPLUSFOUR)])
*(yvel0[ARRAYXY(j ,k ,XMAXPLUSFIVE)]
+yvel0[ARRAYXY(j+1,k ,XMAXPLUSFIVE)]
+yvel0[ARRAYXY(j ,k ,XMAXPLUSFIVE)]
+yvel0[ARRAYXY(j+1,k ,XMAXPLUSFIVE)])
*0.25*dt*0.5;
top_flux= (yarea[ARRAYXY(j ,k+1,XMAXPLUSFOUR)])
*(yvel0[ARRAYXY(j ,k+1,XMAXPLUSFIVE)]
+yvel0[ARRAYXY(j+1,k+1,XMAXPLUSFIVE)]
+yvel0[ARRAYXY(j ,k+1,XMAXPLUSFIVE)]
+yvel0[ARRAYXY(j+1,k+1,XMAXPLUSFIVE)])
*0.25*dt*0.5;
total_flux=right_flux-left_flux+top_flux-bottom_flux;
volume_change=volume[ARRAYXY(j,k,XMAXPLUSFOUR)]/(volume[ARRAYXY(j,k,XMAXPLUSFOUR)]+total_flux);
min_cell_volume=fmin(volume[ARRAYXY(j ,k ,XMAXPLUSFOUR)]+right_flux-left_flux+top_flux-bottom_flux
,fmin(volume[ARRAYXY(j,k,XMAXPLUSFOUR)]+right_flux-left_flux
,volume[ARRAYXY(j,k,XMAXPLUSFOUR)]+top_flux-bottom_flux));
recip_volume=1.0/volume[ARRAYXY(j ,k ,XMAXPLUSFOUR)];
energy_change=(pressure[ARRAYXY(j,k,XMAXPLUSFOUR)]/density0[ARRAYXY(j,k,XMAXPLUSFOUR)]
+viscosity[ARRAYXY(j,k,XMAXPLUSFOUR)]/density0[ARRAYXY(j,k,XMAXPLUSFOUR)])
*total_flux*recip_volume;
energy1[ARRAYXY(j,k,XMAXPLUSFOUR)]=energy0[ARRAYXY(j,k,XMAXPLUSFOUR)]-energy_change;
density1[ARRAYXY(j,k,XMAXPLUSFOUR)]=density0[ARRAYXY(j,k,XMAXPLUSFOUR)]*volume_change;
}
}
__kernel void pdv_predict_ocl_kernel(
const double dt,
__global const double * restrict xarea,
__global const double * restrict yarea,
__global const double * restrict volume,
__global const double * restrict density0,
__global double * restrict density1,
__global const double * restrict energy0,
__global double * restrict energy1,
__global const double * restrict pressure,
__global const double * restrict viscosity,
__global const double * restrict xvel0,
__global const double * restrict xvel1,
__global const double * restrict yvel0,
__global const double * restrict yvel1)
{
double recip_volume,energy_change,min_cell_volume,right_flux,left_flux,top_flux,bottom_flux,total_flux,volume_change;
int j = get_global_id(0);
int k = get_global_id(1);
if((j>=2) && (j<=XMAXPLUSONE) && (k>=2) && (k<=YMAXPLUSONE)) {
left_flux= (xarea[ARRAYXY(j ,k ,XMAXPLUSFIVE)])
*(xvel0[ARRAYXY(j ,k ,XMAXPLUSFIVE)]
+xvel0[ARRAYXY(j ,k+1,XMAXPLUSFIVE)]
+xvel1[ARRAYXY(j ,k ,XMAXPLUSFIVE)]
+xvel1[ARRAYXY(j ,k+1,XMAXPLUSFIVE)])
*0.25*dt;
right_flux= (xarea[ARRAYXY(j+1,k ,XMAXPLUSFIVE)])
*(xvel0[ARRAYXY(j+1,k ,XMAXPLUSFIVE)]
+xvel0[ARRAYXY(j+1,k+1,XMAXPLUSFIVE)]
+xvel1[ARRAYXY(j+1,k ,XMAXPLUSFIVE)]
+xvel1[ARRAYXY(j+1,k+1,XMAXPLUSFIVE)])
*0.25*dt;
bottom_flux=(yarea[ARRAYXY(j ,k ,XMAXPLUSFOUR)])
*(yvel0[ARRAYXY(j ,k ,XMAXPLUSFIVE)]
+yvel0[ARRAYXY(j+1,k ,XMAXPLUSFIVE)]
+yvel1[ARRAYXY(j ,k ,XMAXPLUSFIVE)]
+yvel1[ARRAYXY(j+1,k ,XMAXPLUSFIVE)])
*0.25*dt;
top_flux= (yarea[ARRAYXY(j ,k+1,XMAXPLUSFOUR)])
*(yvel0[ARRAYXY(j ,k+1,XMAXPLUSFIVE)]
+yvel0[ARRAYXY(j+1,k+1,XMAXPLUSFIVE)]
+yvel1[ARRAYXY(j ,k+1,XMAXPLUSFIVE)]
+yvel1[ARRAYXY(j+1,k+1,XMAXPLUSFIVE)])
*0.25*dt;
total_flux=right_flux-left_flux+top_flux-bottom_flux;
volume_change=volume[ARRAYXY(j,k,XMAXPLUSFOUR)]/(volume[ARRAYXY(j,k,XMAXPLUSFOUR)]+total_flux);
min_cell_volume=fmin(volume[ARRAYXY(j,k,XMAXPLUSFOUR)]+right_flux-left_flux+top_flux-bottom_flux
,fmin(volume[ARRAYXY(j,k,XMAXPLUSFOUR)]+right_flux-left_flux
,volume[ARRAYXY(j,k,XMAXPLUSFOUR)]+top_flux-bottom_flux)
);
recip_volume=1.0/volume[ARRAYXY(j,k,XMAXPLUSFOUR)];
energy_change=(pressure[ARRAYXY(j,k,XMAXPLUSFOUR)]/density0[ARRAYXY(j,k,XMAXPLUSFOUR)]
+viscosity[ARRAYXY(j,k,XMAXPLUSFOUR)]/density0[ARRAYXY(j,k,XMAXPLUSFOUR)])
*total_flux*recip_volume;
energy1[ARRAYXY(j,k,XMAXPLUSFOUR)]=energy0[ARRAYXY(j,k,XMAXPLUSFOUR)]-energy_change;
density1[ARRAYXY(j,k,XMAXPLUSFOUR)]=density0[ARRAYXY(j,k,XMAXPLUSFOUR)]*volume_change;
}
}