| 1 |
ce107 |
1.1 |
CStartOfInterface |
| 2 |
|
|
SUBROUTINE INI_CG2D |
| 3 |
|
|
C /==========================================================\ |
| 4 |
|
|
C | SUBROUTINE INI_CG2D | |
| 5 |
|
|
C | o Initialise 2d conjugate gradient solver operators. | |
| 6 |
|
|
C |==========================================================| |
| 7 |
|
|
C | These arrays are purely a function of the basin geom. | |
| 8 |
|
|
C | We set then here once and them use then repeatedly. | |
| 9 |
|
|
C | In this example we hard code a periodic channel with a | |
| 10 |
|
|
C | grid spacing on 1. | |
| 11 |
|
|
C \==========================================================/ |
| 12 |
|
|
IMPLICIT NONE |
| 13 |
|
|
|
| 14 |
|
|
C === Global variables === |
| 15 |
|
|
#include "SIZE.h" |
| 16 |
|
|
#include "EEPARAMS.h" |
| 17 |
|
|
#include "PARAMS.h" |
| 18 |
|
|
#include "CG2D.h" |
| 19 |
|
|
|
| 20 |
|
|
C === Routine arguments === |
| 21 |
|
|
C myThid - Thread no. that called this routine. |
| 22 |
|
|
INTEGER myThid |
| 23 |
|
|
CEndOfInterface |
| 24 |
|
|
|
| 25 |
|
|
C === Local variables === |
| 26 |
|
|
C xG, yG - Global coordinate location. |
| 27 |
|
|
C zG |
| 28 |
|
|
C iG, jG - Global coordinate index |
| 29 |
|
|
C bi,bj - Loop counters |
| 30 |
|
|
C faceArea - Temporary used to hold cell face areas. |
| 31 |
|
|
C I,J,K |
| 32 |
|
|
INTEGER I, J, K |
| 33 |
|
|
INTEGER iG, jG |
| 34 |
|
|
|
| 35 |
|
|
C-- Initialise laplace operator |
| 36 |
|
|
C aW2d: integral Ax/dX |
| 37 |
|
|
C aS2d: integral Ay/dY |
| 38 |
|
|
DO J=1-OLy,sNy+OLy |
| 39 |
|
|
DO I=1-OLx,sNx+OLx |
| 40 |
|
|
iG = myXGlobalLo+I-1 |
| 41 |
|
|
jG = myYGlobalLo+J-1 |
| 42 |
|
|
aW2d(I,J) = 1. _d 0 |
| 43 |
|
|
aS2d(I,J) = 1. _d 0 |
| 44 |
|
|
IF ( jG .EQ. 1 .OR. jG .EQ. nY+1 ) THEN |
| 45 |
|
|
aS2d(I,J) = 0. |
| 46 |
|
|
ENDIF |
| 47 |
|
|
ENDDO |
| 48 |
|
|
ENDDO |
| 49 |
|
|
C CALL PLOT_FIELD_XYR8( aW2d, 'AW2D INI_CG2D') |
| 50 |
|
|
C CALL PLOT_FIELD_XYR8( aS2d, 'AS2D INI_CG2D') |
| 51 |
|
|
|
| 52 |
|
|
C-- Initialise preconditioner |
| 53 |
|
|
DO J=1,sNy |
| 54 |
|
|
DO I=1,sNx |
| 55 |
|
|
pC(I,J) = 1. _d 0 |
| 56 |
|
|
IF ( |
| 57 |
|
|
& aW2d(I,J) + aW2d(I+1,J) |
| 58 |
|
|
& +aS2d(I,J) + aS2D(I,J+1) |
| 59 |
|
|
& .EQ. 0. |
| 60 |
|
|
& ) pC(I,J) = 0. _d 0 |
| 61 |
|
|
pW(I,J) = 0. |
| 62 |
|
|
pS(I,J) = 0. |
| 63 |
|
|
ENDDO |
| 64 |
|
|
ENDDO |
| 65 |
|
|
C-- Update overlap regions |
| 66 |
|
|
CALL EXCH_XY_R8(pC) |
| 67 |
|
|
CALL EXCH_XY_R8(pW) |
| 68 |
|
|
CALL EXCH_XY_R8(pS) |
| 69 |
|
|
|
| 70 |
|
|
C-- Set default values for initial guess |
| 71 |
|
|
DO J=1,sNy |
| 72 |
|
|
DO I=1,sNx |
| 73 |
|
|
cg2d_x(I,J) = 0. _d 0 |
| 74 |
|
|
ENDDO |
| 75 |
|
|
ENDDO |
| 76 |
|
|
C-- Update overlap regions |
| 77 |
|
|
CALL EXCH_XY_R8(cg2d_x) |
| 78 |
|
|
|
| 79 |
|
|
RETURN |
| 80 |
|
|
END |
Parent Directory
| 
Revision Log
| 
Revision Graph