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! $Header: /home/cvsroot/LMDZ4/libf/dyn3d/psextbar.F,v 1.1.1.1 2004/05/19 12:53:06 lmdzadmin Exp $ |
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SUBROUTINE psextbar ( ps, psexbarxy ) |
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use dimens_m |
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use paramet_m |
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use comgeom |
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IMPLICIT NONE |
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c======================================================================= |
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c |
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c Auteur: P. Le Van |
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c ------- |
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c |
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c Objet: |
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c ------ |
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c |
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c ********************************************************************** |
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c calcul des moyennes en x et en y de (pression au sol*aire variable) .. |
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c ********************************************************************** |
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c |
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c ps est un argum. d'entree pour le s-pg .. |
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c psexbarxy est un argum. de sortie pour le s-pg .. |
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c |
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c Methode: |
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c -------- |
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c |
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c A chaque point scalaire P (i,j) est affecte 4 coefficients d'aires |
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c alpha1(i,j) calcule au point ( i+1/4,j-1/4 ) |
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c alpha2(i,j) calcule au point ( i+1/4,j+1/4 ) |
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c alpha3(i,j) calcule au point ( i-1/4,j+1/4 ) |
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c alpha4(i,j) calcule au point ( i-1/4,j-1/4 ) |
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c |
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c Avec alpha1(i,j) = aire(i+1/4,j-1/4)/ aire(i,j) |
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c |
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c N.B . Pour plus de details, voir s-pg ... iniconst ... |
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c |
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c |
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c |
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c alpha4 . . alpha1 . alpha4 |
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c (i,j) (i,j) (i+1,j) |
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c |
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c P . U . . P |
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c (i,j) (i,j) (i+1,j) |
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c |
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c alpha3 . . alpha2 .alpha3 |
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c (i,j) (i,j) (i+1,j) |
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c |
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c V . Z . . V |
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c (i,j) |
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c |
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c alpha4 . . alpha1 .alpha4 |
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c (i,j+1) (i,j+1) (i+1,j+1) |
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c |
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c P . U . . P |
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c (i,j+1) (i+1,j+1) |
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c |
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c |
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c |
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c |
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c On a : |
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c |
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c pbarx(i,j) = Pext(i ,j) * ( alpha1(i ,j) + alpha2(i,j)) + |
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c Pext(i+1,j) * ( alpha3(i+1,j) + alpha4(i+1,j) ) |
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c localise au point ... U (i,j) ... |
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c |
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c pbary(i,j) = Pext(i,j ) * ( alpha2(i,j ) + alpha3(i,j ) + |
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c Pext(i,j+1) * ( alpha1(i,j+1) + alpha4(i,j+1) |
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c localise au point ... V (i,j) ... |
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c |
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c pbarxy(i,j)= Pext(i,j) *alpha2(i,j) + Pext(i+1,j) *alpha3(i+1,j) + |
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c Pext(i,j+1)*alpha1(i,j+1)+ Pext(i+1,j+1)*alpha4(i+1,j+1) |
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c localise au point ... Z (i,j) ... |
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c |
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c |
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c |
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c======================================================================= |
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REAL, intent(in):: ps( ip1jmp1 ) |
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real psexbarxy ( ip1jm ), pext( ip1jmp1 ) |
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INTEGER l, ij |
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c |
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DO ij = 1, ip1jmp1 |
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pext(ij) = ps(ij) * aire(ij) |
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ENDDO |
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DO 5 ij = 1, ip1jm - 1 |
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psexbarxy( ij ) = pext(ij)*alpha2(ij) + pext(ij+1)*alpha3(ij+1) + |
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* pext(ij+iip1)*alpha1(ij+iip1) + pext(ij+iip2)*alpha4(ij+iip2) |
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5 CONTINUE |
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c .... correction pour psexbarxy( iip1,j ) ........ |
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CDIR$ IVDEP |
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DO 7 ij = iip1, ip1jm, iip1 |
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psexbarxy( ij ) = psexbarxy( ij - iim ) |
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7 CONTINUE |
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RETURN |
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END |
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