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joeri.brackenhoff authoredjoeri.brackenhoff authored
acoustic4_3D.c 7.54 KiB
#include<stdlib.h>
#include<stdio.h>
#include<math.h>
#include<assert.h>
#include"fdelmodc3D.h"
#define MIN(x,y) ((x) < (y) ? (x) : (y))
long applySource(modPar mod, srcPar src, wavPar wav, bndPar bnd, long itime, long ixsrc, long izsrc, float *vx, float *vz, float *tzz, float *txx, float *txz, float *rox, float *roz, float *l2m, float **src_nwav, long verbose);
long storeSourceOnSurface(modPar mod, srcPar src, bndPar bnd, long ixsrc, long izsrc, float *vx, float *vz, float *tzz, float *txx, float *txz, long verbose);
long reStoreSourceOnSurface(modPar mod, srcPar src, bndPar bnd, long ixsrc, long izsrc, float *vx, float *vz, float *tzz, float *txx, float *txz, long verbose);
long boundariesP(modPar mod, bndPar bnd, float *vx, float *vz, float *tzz, float *txx, float *txz, float *rox, float *roz, float *l2m, float *lam, float *mul, long itime, long verbose);
long boundariesV(modPar mod, bndPar bnd, float *vx, float *vz, float *tzz, float *txx, float *txz, float *rox, float *roz, float *l2m, float *lam, float *mul, long itime, long verbose);
long acoustic4_3D(modPar mod, srcPar src, wavPar wav, bndPar bnd, long itime, long ixsrc, long iysrc, long izsrc, float **src_nwav, float *vx, float *vy, float *vz, float *p, float *rox, float *roy, float *roz, float *l2m, long verbose)
{
/*********************************************************************
COMPUTATIONAL OVERVIEW OF THE 4th ORDER STAGGERED GRID:
The captial symbols T (=P) Txz,Vx,Vz represent the actual grid
The indices ix,iz are related to the T grid, so the capital T
symbols represent the actual modelled grid.
one cel (iz,ix)
|
V extra column of vx,txz
|
------- V
| txz vz| txz vz txz vz txz vz txz vz txz vz txz
| |
| vx t | vx t vx t vx t vx t vx t vx
-------
txz vz txz vz txz vz txz vz txz vz txz vz txz
vx t vx T---Vx--T---Vx--T---Vx--T vx t vx
| | | | | | |
txz vz txz Vz--Txz-Vz--Txz-Vz Txz-Vz txz vz txz
| | | | | | |
vx t vx T---Vx--T---Vx--T---Vx--T vx t vx
| | | | | | |
txz vz txz Vz Txz-Vz Txz-Vz Txz-Vz txz vz txz
| | | | | | |
vx t vx T---Vx--T---Vx--T---Vx--T vx t vx
| | | | | | |
txz vz txz Vz Txz-Vz Txz-Vz Txz-Vz txz vz txz
| | | | | | |
vx t vx T---Vx--T---Vx--T---Vx--T vx t vx
txz vz txz vz txz vz txz vz txz vz txz vz txz
vx t vx t vx t vx t vx t vx t vx
txz vz txz vz txz vz txz vz txz vz txz vz txz <--|
|
extra row of txz/vz |
AUTHOR:
Jan Thorbecke (janth@xs4all.nl)
The Netherlands
***********************************************************************/
float c1, c2;
long ix, iy, iz;
long n1, n2;
long ioXx, ioXy, ioXz, ioYx, ioYy, ioYz, ioZx, ioZy, ioZz, ioPx, ioPy, ioPz;
c1 = 9.0/8.0;
c2 = -1.0/24.0;
n1 = mod.naz;
n2 = mod.nay;
/* calculate vx for all grid points except on the virtual boundary*/
#pragma omp for private (ix, iy, iz) nowait schedule(guided,1)
for (iy=mod.ioXy; iy<mod.ieXy; iy++) {
#pragma ivdep
for (ix=mod.ioXx; ix<mod.ieXx; ix++) {
for (iz=mod.ioXz; iz<mod.ieXz; iz++) {
vx[iy*n2*n1+ix*n1+iz] -= rox[iy*n2*n1+ix*n1+iz]*(
c1*(p[iy*n2*n1+ix*n1+iz] - p[iy*n2*n1+(ix-1)*n1+iz]) +
c2*(p[iy*n2*n1+(ix+1)*n1+iz] - p[iy*n2*n1+(ix-2)*n1+iz]));
}
}
}
/* calculate vy for all grid points except on the virtual boundary*/
#pragma omp for private (ix, iy, iz) nowait schedule(guided,1)
for (iy=mod.ioYy; iy<mod.ieYy; iy++) {
#pragma ivdep
for (ix=mod.ioYx; ix<mod.ieYx; ix++) {
for (iz=mod.ioYz; iz<mod.ieYz; iz++) {
vy[iy*n2*n1+ix*n1+iz] -= roy[iy*n2*n1+ix*n1+iz]*(
c1*(p[iy*n2*n1+ix*n1+iz] - p[(iy-1)*n2*n1+ix*n1+iz]) +
c2*(p[(iy+1)*n2*n1+ix*n1+iz] - p[(iy-2)*n2*n1+ix*n1+iz]));
}
}
}
/* calculate vz for all grid points except on the virtual boundary */
#pragma omp for private (ix, iy, iz) schedule(guided,1)
for (iy=mod.ioZy; iy<mod.ieZy; iy++) {
#pragma ivdep
for (ix=mod.ioZx; ix<mod.ieZx; ix++) {
for (iz=mod.ioZz; iz<mod.ieZz; iz++) {
vz[iy*n2*n1+ix*n1+iz] -= roz[iy*n2*n1+ix*n1+iz]*(
c1*(p[iy*n2*n1+ix*n1+iz] - p[iy*n2*n1+ix*n1+iz-1]) +
c2*(p[iy*n2*n1+ix*n1+iz+1] - p[iy*n2*n1+ix*n1+iz-2]));
}
}
}
/* boundary condition clears velocities on boundaries */
boundariesP3D(mod, bnd, vx, vy, vz, p, NULL, NULL, NULL, NULL, NULL, rox, roy, roz, l2m, NULL, NULL, itime, verbose);
/* Add force source */
if (src.type > 5) {
applySource3D(mod, src, wav, bnd, itime, ixsrc, iysrc, izsrc, vx, vy, vz, p, NULL, NULL, NULL, NULL, NULL, rox, roy, roz, l2m, src_nwav, verbose);
}
/* this is needed because the P fields are not using tapered boundaries (bnd....=4) */
if (bnd.top==2) mod.ioPz += bnd.npml;
if (bnd.bot==2) mod.iePz -= bnd.npml;
if (bnd.fro==2) mod.ioPy += bnd.npml;
if (bnd.bac==2) mod.iePy -= bnd.npml;
if (bnd.lef==2) mod.ioPx += bnd.npml;
if (bnd.rig==2) mod.iePx -= bnd.npml;
/* calculate p/tzz for all grid points except on the virtual boundary */
#pragma omp for private (ix, iy, iz) schedule(guided,1)
//#pragma omp for private (ix, iz) schedule(dynamic)
#pragma ivdep
for (ix=mod.ioPx; ix<mod.iePx; ix++) {
#pragma ivdep
for (iy=mod.ioPy; iy<mod.iePy; iy++) {
for (iz=mod.ioPz; iz<mod.iePz; iz++) {
p[iy*n1*n2+ix*n1+iz] -= l2m[iy*n1*n2+ix*n1+iz]*( c1*(vx[iy*n1*n2+(ix+1)*n1+iz] - vx[iy*n1*n2+ix*n1+iz]) +
c2*(vx[iy*n1*n2+(ix+2)*n1+iz] - vx[iy*n1*n2+(ix-1)*n1+iz]) +
c1*(vy[(iy+1)*n1*n2+ix*n1+iz] - vy[iy*n1*n2+ix*n1+iz]) +
c2*(vy[(iy+2)*n1*n2+ix*n1+iz] - vy[(iy-1)*n1*n2+ix*n1+iz]) +
c1*(vz[iy*n1*n2+ix*n1+iz+1] - vz[iy*n1*n2+ix*n1+iz]) +
c2*(vz[iy*n1*n2+ix*n1+iz+2] - vz[iy*n1*n2+ix*n1+iz-1]));
}
}
}
if (bnd.top==2) mod.ioPz -= bnd.npml;
if (bnd.bot==2) mod.iePz += bnd.npml;
if (bnd.fro==2) mod.ioPy -= bnd.npml;
if (bnd.bac==2) mod.iePy += bnd.npml;
if (bnd.lef==2) mod.ioPx -= bnd.npml;
if (bnd.rig==2) mod.iePx += bnd.npml;
/* Add stress source */
if (src.type < 6) {
applySource3D(mod, src, wav, bnd, itime, ixsrc, iysrc, izsrc, vx, vy, vz, p, NULL, NULL, NULL, NULL, NULL, rox, roy, roz, l2m, src_nwav, verbose);
}
/* Free surface: calculate free surface conditions for stresses */
/* check if there are sources placed on the free surface */
storeSourceOnSurface3D(mod, src, bnd, ixsrc, iysrc, izsrc, vx, vy, vz, p, NULL, NULL, NULL, NULL, NULL, verbose);
/* Free surface: calculate free surface conditions for stresses */
boundariesV3D(mod, bnd, vx, vy, vz, p, NULL, NULL, NULL, NULL, NULL, rox, roy, roz, l2m, NULL, NULL, itime, verbose);
/* restore source positions on the edge */
reStoreSourceOnSurface3D(mod, src, bnd, ixsrc, iysrc, izsrc, vx, vy, vz, p, NULL, NULL, NULL, NULL, NULL, verbose);
return 0;
}