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module gradiv2_m |
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IMPLICIT NONE |
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contains |
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SUBROUTINE gradiv2(klevel, xcov, ycov, ld, gdx, gdy, cdivu) |
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! From LMDZ4/libf/dyn3d/gradiv2.F, version 1.1.1.1 2004/05/19 12:53:07 |
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! P. Le Van |
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! Calcul de grad div du vecteur v. |
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|
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USE dimens_m, ONLY : llm |
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USE paramet_m, ONLY : ip1jm, ip1jmp1, jjp1 |
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USE comgeom, ONLY : cuvscvgam1, cvuscugam1, unsair_gam1, unsapolnga1, & |
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unsapolsga1 |
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USE filtreg_m, ONLY : filtreg |
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INTEGER, intent(in):: klevel |
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! composantes covariantes de v: |
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REAL, intent(in):: xcov(ip1jmp1,klevel), ycov(ip1jm,klevel) |
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integer, intent(in):: ld |
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REAL, intent(out):: gdx(ip1jmp1,klevel), gdy(ip1jm,klevel) |
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real, intent(in):: cdivu |
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|
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! Variables locales : |
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REAL div(ip1jmp1,llm) |
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REAL nugrads |
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INTEGER l,ij,iter |
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!-------------------------------------------------------------- |
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gdx = xcov |
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gdy = ycov |
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CALL divergf(klevel, gdx, gdy, div) |
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|
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IF(ld.GT.1) THEN |
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CALL laplacien (klevel, div, div) |
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! Iteration de l'operateur laplacien_gam |
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DO iter = 1, ld -2 |
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CALL laplacien_gam (klevel,cuvscvgam1,cvuscugam1,unsair_gam1, & |
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unsapolnga1, unsapolsga1, div, div) |
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ENDDO |
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ENDIF |
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|
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CALL filtreg(div, jjp1, klevel, 2, 1, .TRUE., 1) |
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CALL grad (klevel, div, gdx, gdy) |
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nugrads = (-1.)**ld * cdivu |
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|
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DO l = 1, klevel |
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DO ij = 1, ip1jmp1 |
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gdx(ij,l) = gdx(ij,l) * nugrads |
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ENDDO |
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DO ij = 1, ip1jm |
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gdy(ij,l) = gdy(ij,l) * nugrads |
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ENDDO |
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ENDDO |
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END SUBROUTINE gradiv2 |
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end module gradiv2_m |
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