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67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
#include <stdio.h>
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#include <stddef.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <math.h>
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#include "geostat.h"
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#include "pressure.h"
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/* Build_pressure */
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/* build pressure in spectral domain */
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void build_pressure(int n[3],struct grid_mod grid,struct pressure_mod gradient,double *realization,double *ireal,double *pressure,double *ipressure)
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{
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int i,j,k,maille1;
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double ki,kj,kk;
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double coeff,temp,temp2;
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/* pressure calculation in the spectral domain*/
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for ( k = 1; k <= n[2]; k++) {
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for (j = 1; j <= n[1]; j++) {
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for (i = 1; i <= n[0]; i++) {
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maille1 = i+(j-1+(k-1)*n[1])*n[0];
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if (n[0]==1)
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{
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ki=0.;
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}
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else
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{
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ki =(double)(i-1)/(double)(grid.NX*grid.DX);
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}
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if (n[1]==1)
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{
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kj=0.;
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}
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else
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{
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kj =(double)j/(double)(grid.NY*grid.DY);
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}
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if (n[2]==1)
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{
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kk=0.;
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}
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else
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{
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kk =(double)k/(double)(grid.NZ*grid.DZ);
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}
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coeff = (gradient.x*ki+gradient.y*kj+gradient.z*kk)/(ki*ki+kj*kj+kk*kk);
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temp = realization[maille1];
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temp2= ireal[maille1];
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if (maille1==1)
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{
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pressure[maille1] =0.;
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ipressure[maille1]=0.;
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}
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else
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{
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pressure[maille1] =-1./(2*3.14)*coeff*temp2;
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ipressure[maille1]= 1./(2*3.14)*coeff*temp;
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}
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}
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}
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}
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return;
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}
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