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C $Header: /u/gcmpack/models/MITgcmUV/verification/exp4/set_obcs.F,v 1.2 1998/12/09 16:11:54 adcroft Exp $ |
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#include "CPP_OPTIONS.h" |
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|
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CStartOfInterface |
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SUBROUTINE SET_OBCS( myCurrentTime, myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE SET_OBCS | |
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C | o Set boundary conditions at open boundaries | |
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C |==========================================================| |
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C | | |
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C \==========================================================/ |
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IMPLICIT NONE |
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|
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C === Global variables === |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "DYNVARS.h" |
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#include "OBCS.h" |
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|
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C == Routine arguments == |
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C myThid - Number of this instance of INI_DEPTHS |
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_RL myCurrentTime |
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INTEGER myThid |
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CEndOfInterface |
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|
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C == Local variables == |
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C xG, yG - Global coordinate location. |
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C zG |
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C zUpper - Work arrays for upper and lower |
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C zLower cell-face heights. |
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C phi - Temporary scalar |
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C iG, jG - Global coordinate index |
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C bi,bj - Loop counters |
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C zUpper - Temporary arrays holding z coordinates of |
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C zLower upper and lower faces. |
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C I,i,K |
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INTEGER iG, jG |
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INTEGER bi, bj |
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INTEGER I, J, K |
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_RL obTimeScale,Uinflow |
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c |
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obTimeScale = 2000.0 |
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Uinflow = 0.25 |
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|
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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DO K=1,Nr |
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DO J=1-Oly,sNy+Oly |
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OBEu(J,K,bi,bj)=Uinflow |
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c & *sin(2.*PI*myCurrentTime/obTimeScale) |
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c & *max(myCurrentTime/obTimeScale,1.) |
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OBEv(J,K,bi,bj)=0. |
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OBEt(J,K,bi,bj)=tRef(K) |
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OBWu(J,K,bi,bj)=Uinflow |
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c & *sin(2.*PI*myCurrentTime/obTimeScale) |
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c & *max(myCurrentTime/obTimeScale,1.) |
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OBWv(J,K,bi,bj)=0. |
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OBWt(J,K,bi,bj)=tRef(K) |
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ENDDO |
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DO I=1-Olx,sNx+Olx |
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OBNu(I,K,bi,bj)=Uinflow |
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OBNv(I,K,bi,bj)=0. |
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OBNt(I,K,bi,bj)=tRef(K) |
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OBSu(I,K,bi,bj)=Uinflow |
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OBSv(I,K,bi,bj)=0. |
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OBSt(I,K,bi,bj)=tRef(K) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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#ifdef SIMPLE_OBCS |
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C This is an example of some rudimentary OBCs. |
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C These work but aren't very sophisticated... |
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C (The above specified OBCs produce nicer results!) |
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C [Remove the CPP #ifdef and #endif to use this code] |
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|
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C Simple upwind-type radiation OBCs |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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|
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DO K=1,Nr |
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DO J=1-Oly,sNy+Oly |
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C Eastern boundary |
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IF (uVel( OB_Ie(J,bi,bj) ,J,K,bi,bj).LE.0.) THEN |
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C Incoming flow or forced in-flow |
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OBEu(J,K,bi,bj)=Uinflow |
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OBEt(J,K,bi,bj)=tRef(K) |
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ELSE |
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C Outgoing flow |
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OBEu(J,K,bi,bj)=uVel( OB_Ie(J,bi,bj)-1 ,J,K,bi,bj) |
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OBEt(J,K,bi,bj)=theta( OB_Ie(J,bi,bj)-1 ,J,K,bi,bj) |
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ENDIF |
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OBEv(J,K,bi,bj)=0. |
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C Western boundary |
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IF (uVel( OB_Iw(J,bi,bj)+1 ,J,K,bi,bj).GE.0.) THEN |
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C Incoming flow or forced in-flow |
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OBWu(J,K,bi,bj)=Uinflow |
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OBWt(J,K,bi,bj)=tRef(K) |
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ELSE |
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C Outgoing flow |
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OBEu(J,K,bi,bj)=uVel( OB_Iw(J,bi,bj)+1 ,J,K,bi,bj) |
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OBEt(J,K,bi,bj)=theta( OB_Iw(J,bi,bj)+1 ,J,K,bi,bj) |
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ENDIF |
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OBWv(J,K,bi,bj)=0. |
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ENDDO |
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ENDDO |
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|
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DO K=1,Nr |
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DO I=1-Olx,sNx+Olx |
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C Northern boundary |
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IF (vVel(I, OB_Jn(I,bi,bj) ,K,bi,bj).LE.0.) THEN |
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C Incoming flow or forced in-flow |
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OBNv(I,K,bi,bj)=0. |
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OBNt(I,K,bi,bj)=tRef(K) |
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ELSE |
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C Outgoing |
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OBNv(I,K,bi,bj)=vVel(I, OB_Jn(I,bi,bj)-1 ,K,bi,bj) |
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OBNt(I,K,bi,bj)=theta(I, OB_Jn(I,bi,bj)-1 ,K,bi,bj) |
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ENDIF |
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OBNu(I,K,bi,bj)=Uinflow |
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C Southern boundary |
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IF (vVel(I, OB_Js(I,bi,bj)+1 ,K,bi,bj).GE.0.) THEN |
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C Incoming flow or forced in-flow |
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OBSv(I,K,bi,bj)=0. |
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OBSt(I,K,bi,bj)=tRef(K) |
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ELSE |
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C Outgoing |
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OBSv(I,K,bi,bj)=vVel(I, OB_Js(I,bi,bj)+1 ,K,bi,bj) |
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OBSt(I,K,bi,bj)=theta(I, OB_Js(I,bi,bj)+1 ,K,bi,bj) |
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ENDIF |
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OBSu(I,K,bi,bj)=Uinflow |
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ENDDO |
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ENDDO |
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|
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ENDDO |
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ENDDO |
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#endif |
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|
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C |
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RETURN |
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END |