update_v_acoustic_PML.c 13.9 KB
Newer Older
Tilman Steinweg's avatar
Tilman Steinweg committed
1
/*-----------------------------------------------------------------------------------------
Florian Wittkamp's avatar
Florian Wittkamp committed
2
 * Copyright (C) 2016  For the list of authors, see file AUTHORS.
Tilman Steinweg's avatar
Tilman Steinweg committed
3
 *
Florian Wittkamp's avatar
Florian Wittkamp committed
4
 * This file is part of IFOS.
Tilman Steinweg's avatar
Tilman Steinweg committed
5
 * 
Florian Wittkamp's avatar
Florian Wittkamp committed
6
 * IFOS is free software: you can redistribute it and/or modify
Tilman Steinweg's avatar
Tilman Steinweg committed
7
8
9
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 2.0 of the License only.
 * 
Florian Wittkamp's avatar
Florian Wittkamp committed
10
 * IFOS is distributed in the hope that it will be useful,
Tilman Steinweg's avatar
Tilman Steinweg committed
11
12
13
14
15
 * 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
Florian Wittkamp's avatar
Florian Wittkamp committed
16
 * along with IFOS. See file COPYING and/or <http://www.gnu.org/licenses/gpl-2.0.html>.
Tilman Steinweg's avatar
Tilman Steinweg committed
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
-----------------------------------------------------------------------------------------*/
/*------------------------------------------------------------------------
 *   updating particle velocities at gridpoints [nx1...nx2][ny1...ny2]
 *   by a staggered grid finite difference scheme of FDORDER accuracy in space
 *   and second order accuracy in time
 *
 *  ----------------------------------------------------------------------*/

#include "fd.h"



void update_v_acoustic_PML(int nx1, int nx2, int ny1, int ny2, int nt,
	float **  vx, float **  vxp1, float **  vxm1, float ** vy, float **  vyp1, float **  vym1, float ** sp,
	float  **rip, float **rjp, float **  srcpos_loc, float ** signals, float ** signals1, int nsrc, float ** absorb_coeff,
	float *hc, int infoout,int sw, float * K_x_half, float * a_x_half, float * b_x_half,
        float * K_y_half, float * a_y_half, float * b_y_half,
        float ** psi_sxx_x, float ** psi_syy_y){

	int i, j,l,fdoh,m, h, h1;
	float amp, dtdh, azi_rad;
	float vxtmp, vytmp;
        float sp_x, sp_y;
	
	extern float DT, DH;
	double time1, time2;
43
	extern int MYID, SOURCE_TYPE, ADJOINT_TYPE, FDORDER;
44
        extern int FDORDER, PARAMETERIZATION;
Tilman Steinweg's avatar
Tilman Steinweg committed
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
        extern int FREE_SURF, BOUNDARY, FW;
        extern int NPROCX, NPROCY, POS[3];
	extern FILE *FP;
	extern int VELOCITY;

	
	fdoh = FDORDER/2;
	dtdh = DT*DT/DH;
        
     /* drad = PI/180.0; 
        angle = 135.0; */
         
	if (infoout && (MYID==0)){
		time1=MPI_Wtime();
		fprintf(FP,"\n **Message from update_v (printed by PE %d):\n",MYID);
		fprintf(FP," Updating particle velocities ...");
	}

	
			
	/* ------------------------------------------------------------
	 * Important!
	 * rip and rjp are reciprocal values of averaged densities
	 * ------------------------------------------------------------ */

	switch (FDORDER){
71
	
Tilman Steinweg's avatar
Tilman Steinweg committed
72
73
	case 2:
		for (j=ny1;j<=ny2;j++){
74
75
76
77
		for (i=nx1;i<=nx2;i++){
			sp_x = hc[1]*(sp[j][i+1]-sp[j][i]);
			sp_y = hc[1]*(sp[j+1][i]-sp[j][i]);
			
Tilman Steinweg's avatar
Tilman Steinweg committed
78

79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
			/* left boundary */                                         
			if((!BOUNDARY) && (POS[1]==0) && (i<=FW)){
				
				psi_sxx_x[j][i] = b_x_half[i] * psi_sxx_x[j][i] + a_x_half[i] * sp_x;                                                
				sp_x = sp_x / K_x_half[i] + psi_sxx_x[j][i];
				
			}

			/* right boundary */                                         
			if((!BOUNDARY) && (POS[1]==NPROCX-1) && (i>=nx2-FW+1)){

				h1 = (i-nx2+2*FW);
				h=i; 
				
				/*psi_sxx_x[j][i] = b_x_half[i] * psi_sxx_x[j][i] + a_x_half[i] * sxx_x;                                                
				sxx_x = sxx_x / K_x_half[i] + psi_sxx_x[j][i];*/
				
				psi_sxx_x[j][h1] = b_x_half[h1] * psi_sxx_x[j][h1] + a_x_half[h1] * sp_x;                                                
				sp_x = sp_x / K_x_half[h1] + psi_sxx_x[j][h1];
			}
	
			/* top boundary */                                         
			if((POS[2]==0) && (!(FREE_SURF)) && (j<=FW)){
				
				psi_syy_y[j][i] = b_y_half[j] * psi_syy_y[j][i] + a_y_half[j] * sp_y;                                                
				sp_y = sp_y / K_y_half[j] + psi_syy_y[j][i];
			}
	
			/* bottom boundary */                                         
			if((POS[2]==NPROCY-1) && (j>=ny2-FW+1)){
			
				h1 = (j-ny2+2*FW);
				h = j;
							
				/*psi_syy_y[j][i] = b_y_half[j] * psi_syy_y[j][i] + a_y_half[j] * syy_y;                                                
				syy_y = syy_y / K_y_half[j] + psi_syy_y[j][i];*/
				
				psi_syy_y[h1][i] = b_y_half[h1] * psi_syy_y[h1][i] + a_y_half[h1] * sp_y;                                                
				sp_y = sp_y / K_y_half[h1] + psi_syy_y[h1][i];
			}                       
			
			if(sw==0){
				if (VELOCITY==0){
122
123
124
                    vxp1[j][i] = rip[j][i]*(sp_x)/DH;
                    vyp1[j][i] = rjp[j][i]*(sp_y)/DH;
                }
125
				else{
126
127
128
                    vxp1[j][i] = rip[j][i]*(sp_x)/DH;
                    vyp1[j][i] = rjp[j][i]*(sp_y)/DH;                    
                }
129
130
131
132
			}
			
			if(sw==1){
				if (VELOCITY==0){
133
134
135
                    vxp1[j][i] += vx[j][i]*DT;
                    vyp1[j][i] += vy[j][i]*DT;
                }
136
				else{
137
138
139
                    vxp1[j][i] = vx[j][i];
                    vyp1[j][i] = vy[j][i];
                }
140
141
142
143
144
145
146
147
148
			}
			
			vx[j][i] += DT*rip[j][i]*(sp_x)/DH;
			vy[j][i] += DT*rjp[j][i]*(sp_y)/DH;
      
		}
		}
	break;
	
Tilman Steinweg's avatar
Tilman Steinweg committed
149
		
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
	case 4:
		for (j=ny1;j<=ny2;j++){
		for (i=nx1;i<=nx2;i++){
			sp_x =  hc[1]*(sp[j][i+1]-sp[j][i])
					+ hc[2]*(sp[j][i+2]-sp[j][i-1]);

			sp_y = hc[1]*(sp[j+1][i]-sp[j][i])
					+ hc[2]*(sp[j+2][i]-sp[j-1][i]);
			
			/* left boundary */                                         
			if((!BOUNDARY) && (POS[1]==0) && (i<=FW)){
				
				psi_sxx_x[j][i] = b_x_half[i] * psi_sxx_x[j][i] + a_x_half[i] * sp_x;                                                
				sp_x = sp_x / K_x_half[i] + psi_sxx_x[j][i];

			}

			/* right boundary */                                         
			if((!BOUNDARY) && (POS[1]==NPROCX-1) && (i>=nx2-FW+1)){

				h1 = (i-nx2+2*FW);
				h=i; 
					
				/*psi_sxx_x[j][i] = b_x_half[i] * psi_sxx_x[j][i] + a_x_half[i] * sxx_x;                                                
				sxx_x = sxx_x / K_x_half[i] + psi_sxx_x[j][i];*/
				
				psi_sxx_x[j][h1] = b_x_half[h1] * psi_sxx_x[j][h1] + a_x_half[h1] * sp_x;                                                
				sp_x = sp_x / K_x_half[h1] + psi_sxx_x[j][h1];

			}

	
			/* top boundary */                                         
			if((POS[2]==0) && (!(FREE_SURF)) && (j<=FW)){

				psi_syy_y[j][i] = b_y_half[j] * psi_syy_y[j][i] + a_y_half[j] * sp_y;                                                
				sp_y = sp_y / K_y_half[j] + psi_syy_y[j][i]; 
				
			}
Tilman Steinweg's avatar
Tilman Steinweg committed
189
		
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229

			/* bottom boundary */                                         
			if((POS[2]==NPROCY-1) && (j>=ny2-FW+1)){
				
				h1 = (j-ny2+2*FW);
				h = j;
							
				/*psi_syy_y[j][i] = b_y_half[j] * psi_syy_y[j][i] + a_y_half[j] * syy_y;                                                
				syy_y = syy_y / K_y_half[j] + psi_syy_y[j][i];*/
				
				psi_syy_y[h1][i] = b_y_half[h1] * psi_syy_y[h1][i] + a_y_half[h1] * sp_y;                                                
				sp_y = sp_y / K_y_half[h1] + psi_syy_y[h1][i];
				
			}                   
			
			if(sw==0){
				if (VELOCITY==0){
					vxp1[j][i] = rip[j][i]*(sp_x)/DH;
					vyp1[j][i] = rjp[j][i]*(sp_y)/DH;}
				else{
					vxp1[j][i] = rip[j][i]*(sp_x)/DH;
					vyp1[j][i] = rjp[j][i]*(sp_y)/DH;}
			}
			
			if(sw==1){
				if (VELOCITY==0){
					vxp1[j][i] += vx[j][i]*DT;
					vyp1[j][i] += vy[j][i]*DT;}
				else{
					vxp1[j][i] = vx[j][i];
					vyp1[j][i] = vy[j][i];}
			}
			
			vx[j][i] += DT*rip[j][i]*(sp_x)/DH;
			vy[j][i] += DT*rjp[j][i]*(sp_y)/DH;

		}
		}
	
	break;
Tilman Steinweg's avatar
Tilman Steinweg committed
230
		
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
	case 6:
		for (j=ny1;j<=ny2;j++){
		for (i=nx1;i<=nx2;i++){
			sp_x =  hc[1]*(sp[j][i+1]-sp[j][i])
					+ hc[2]*(sp[j][i+2]-sp[j][i-1])
					+ hc[3]*(sp[j][i+3]-sp[j][i-2]);
			
			sp_y = hc[1]*(sp[j+1][i]-sp[j][i])
					+ hc[2]*(sp[j+2][i]-sp[j-1][i])
					+ hc[3]*(sp[j+3][i]-sp[j-2][i]);
			

			/* left boundary */                                         
			if((!BOUNDARY) && (POS[1]==0) && (i<=FW)){
					
				psi_sxx_x[j][i] = b_x_half[i] * psi_sxx_x[j][i] + a_x_half[i] * sp_x;                                                
				sp_x = sp_x / K_x_half[i] + psi_sxx_x[j][i];
			}

			/* right boundary */                                         
			if((!BOUNDARY) && (POS[1]==NPROCX-1) && (i>=nx2-FW+1)){

				h1 = (i-nx2+2*FW);
				h=i; 
					
				/*psi_sxx_x[j][i] = b_x_half[i] * psi_sxx_x[j][i] + a_x_half[i] * sxx_x;                                                
				sxx_x = sxx_x / K_x_half[i] + psi_sxx_x[j][i];*/
				
				psi_sxx_x[j][h1] = b_x_half[h1] * psi_sxx_x[j][h1] + a_x_half[h1] * sp_x;                                                
				sp_x = sp_x / K_x_half[h1] + psi_sxx_x[j][h1];
			}

		
			/* top boundary */                                         
			if((POS[2]==0) && (!(FREE_SURF)) && (j<=FW)){
						
				psi_syy_y[j][i] = b_y_half[j] * psi_syy_y[j][i] + a_y_half[j] * sp_y;                                                
				sp_y = sp_y / K_y_half[j] + psi_syy_y[j][i];
			}
			

			/* bottom boundary */                                         
			if((POS[2]==NPROCY-1) && (j>=ny2-FW+1)){
				
				h1 = (j-ny2+2*FW);
				h = j;
							
				/*psi_syy_y[j][i] = b_y_half[j] * psi_syy_y[j][i] + a_y_half[j] * syy_y;                                                
				syy_y = syy_y / K_y_half[j] + psi_syy_y[j][i];*/
				
				psi_syy_y[h1][i] = b_y_half[h1] * psi_syy_y[h1][i] + a_y_half[h1] * sp_y;                                                
				sp_y = sp_y / K_y_half[h1] + psi_syy_y[h1][i];
			}                       
			
			if(sw==0){
				if (VELOCITY==0){
					vxp1[j][i] = rip[j][i]*(sp_x)/DH;
					vyp1[j][i] = rjp[j][i]*(sp_y)/DH;}
				else{
					vxp1[j][i] = rip[j][i]*(sp_x)/DH;
					vyp1[j][i] = rjp[j][i]*(sp_y)/DH;}
			}
			
			if(sw==1){
				if (VELOCITY==0){
					vxp1[j][i] += vx[j][i]*DT;
					vyp1[j][i] += vy[j][i]*DT;}
				else{
					vxp1[j][i] = vx[j][i];
					vyp1[j][i] = vy[j][i];}
			}
			
			vx[j][i] += DT*rip[j][i]*(sp_x)/DH;
			vy[j][i] += DT*rjp[j][i]*(sp_y)/DH; 		         

		}
		}

	
	break;
		
	case 8:

		for (j=ny1;j<=ny2;j++){
		for (i=nx1;i<=nx2;i++){

			sp_x =  hc[1]*(sp[j][i+1]-sp[j][i])
					+ hc[2]*(sp[j][i+2]-sp[j][i-1])
					+ hc[3]*(sp[j][i+3]-sp[j][i-2])
					+ hc[4]*(sp[j][i+4]-sp[j][i-3]);

			sp_y = hc[1]*(sp[j+1][i]-sp[j][i])
					+ hc[2]*(sp[j+2][i]-sp[j-1][i])
					+ hc[3]*(sp[j+3][i]-sp[j-2][i])
					+ hc[4]*(sp[j+4][i]-sp[j-3][i]);
			

			/* left boundary */                                         
			if((!BOUNDARY) && (POS[1]==0) && (i<=FW)){
					
				psi_sxx_x[j][i] = b_x_half[i] * psi_sxx_x[j][i] + a_x_half[i] * sp_x;                                                
				sp_x = sp_x / K_x_half[i] + psi_sxx_x[j][i];
			}

			/* right boundary */                                         
			if((!BOUNDARY) && (POS[1]==NPROCX-1) && (i>=nx2-FW+1)){

				h1 = (i-nx2+2*FW);
				h=i; 
					
				/*psi_sxx_x[j][i] = b_x_half[i] * psi_sxx_x[j][i] + a_x_half[i] * sxx_x;                                                
				sxx_x = sxx_x / K_x_half[i] + psi_sxx_x[j][i];*/
				
				psi_sxx_x[j][h1] = b_x_half[h1] * psi_sxx_x[j][h1] + a_x_half[h1] * sp_x;                                                
				sp_x = sp_x / K_x_half[h1] + psi_sxx_x[j][h1];
			}
Tilman Steinweg's avatar
Tilman Steinweg committed
347

348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
		
			/* top boundary */                                         
			if((POS[2]==0) && (!(FREE_SURF)) && (j<=FW)){
						
				psi_syy_y[j][i] = b_y_half[j] * psi_syy_y[j][i] + a_y_half[j] * sp_y;                                                
				sp_y = sp_y / K_y_half[j] + psi_syy_y[j][i];
			}
			

			/* bottom boundary */                                         
			if((POS[2]==NPROCY-1) && (j>=ny2-FW+1)){
				
				h1 = (j-ny2+2*FW);
				h = j;
							
				/*psi_syy_y[j][i] = b_y_half[j] * psi_syy_y[j][i] + a_y_half[j] * syy_y;                                                
				syy_y = syy_y / K_y_half[j] + psi_syy_y[j][i];*/
				
				psi_syy_y[h1][i] = b_y_half[h1] * psi_syy_y[h1][i] + a_y_half[h1] * sp_y;                                                
				sp_y = sp_y / K_y_half[h1] + psi_syy_y[h1][i];
				
			}                       
			
			if(sw==0){
				if (VELOCITY==0){
					vxp1[j][i] = rip[j][i]*(sp_x)/DH;
					vyp1[j][i] = rjp[j][i]*(sp_y)/DH;}
				else{
					vxp1[j][i] = rip[j][i]*(sp_x)/DH;
					vyp1[j][i] = rjp[j][i]*(sp_y)/DH;}
			}
			
			if(sw==1){
				if (VELOCITY==0){
					vxp1[j][i] += vx[j][i]*DT;
					vyp1[j][i] += vy[j][i]*DT;}
				else{
					vxp1[j][i] = vx[j][i];
					vyp1[j][i] = vy[j][i];}
			}
			
			vx[j][i] += DT*rip[j][i]*(sp_x)/DH;
			vy[j][i] += DT*rjp[j][i]*(sp_y)/DH;
		}
		}
	
	break;
Tilman Steinweg's avatar
Tilman Steinweg committed
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
		
	default:
		for (j=ny1;j<=ny2;j++){
			for (i=nx1;i<=nx2;i++){
				vxtmp = 0;
				vytmp = 0;
				for (m=1; m<=fdoh; m++) {
					vxtmp +=   hc[m]*( sp[j][i+m]   - sp[j][i-m+1] );
							
					vytmp +=   hc[m]*( sp[j+m][i]   - sp[j-m+1][i] );
				}
					
				vx[j][i] += vxtmp*dtdh*rip[j][i];
				vy[j][i] += vytmp*dtdh*rjp[j][i];
			}
		}
		break;

	} /* end of switch(FDORDER) */


 		/* Forward Modelling (sw==0) */
	        if(sw==0){
	        for (l=1;l<=nsrc;l++) {
		    i=(int)srcpos_loc[1][l];
		    j=(int)srcpos_loc[2][l];
		    azi_rad=srcpos_loc[7][l]*PI/180;
422
		    SOURCE_TYPE=(int)srcpos_loc[8][l];
Tilman Steinweg's avatar
Tilman Steinweg committed
423
		
424
425
426
		    if(SOURCE_TYPE==2){vx[j][i] += (DT*rip[j][i]*signals1[l][nt])/(DH*DH);}  /* single force in x */
		    if(SOURCE_TYPE==3){vy[j][i] += (DT*rjp[j][i]*signals1[l][nt])/(DH*DH);}  /* single force in y */
		    if(SOURCE_TYPE==4){vx[j][i] += (DT*rip[j][i]*sin(azi_rad) * signals[l][nt])/(DH*DH);    /* rotated force in x */
Tilman Steinweg's avatar
Tilman Steinweg committed
427
428
429
430
431
432
433
		                    vy[j][i] += (DT*rjp[j][i]*cos(azi_rad) * signals[l][nt])/(DH*DH);}  /* rotated force in y */          
		              
		}}
		
		/* Backpropagation (sw==1) */
		if(sw==1){
		for (l=1;l<=nsrc;l++) {
434
435
			i=(int)srcpos_loc[1][l];
			j=(int)srcpos_loc[2][l];
Tilman Steinweg's avatar
Tilman Steinweg committed
436
		    
437
			if(ADJOINT_TYPE==1){
438
439
440
441
				vx[j][i] += signals[l][nt];   /* single force in x */
				vy[j][i] += signals1[l][nt];  /* + single force in y */
			}
			
442
			if(ADJOINT_TYPE==2)
443
				vy[j][i] += signals1[l][nt];  /* single force in y */
444
			if(ADJOINT_TYPE==3)
445
446
				vx[j][i] += signals[l][nt];   /* single force in x */
			
Tilman Steinweg's avatar
Tilman Steinweg committed
447
448
449
450
451
452
453
454
		}}                         
	

	if (infoout && (MYID==0)){
		time2=MPI_Wtime();
		fprintf(FP," finished (real time: %4.2f s).\n",time2-time1);
	}
}