dt42law.F

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!||====================================================================
!||    dt42law   ../starter/source/materials/time_step/dt42law.F
!||--- called by ------------------------------------------------------
!||    dtmain    ../starter/source/materials/time_step/dtmain.F
!||--- calls      -----------------------------------------------------
!||    dtel      ../starter/source/materials/time_step/dtel.F
!||    dtsph     ../starter/source/materials/time_step/dtsph.F
!||====================================================================
      SUBROUTINE dt42law(PM,GEO,PID, MAT, DELTAX, AIRE, VOL, DTX, NEL)
C
C     CALCUL DES DT ELEM. DES LOIS 42 et 69
C
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   G l o b a l   P a r a m e t e r s
C-----------------------------------------------
#include      "mvsiz_p.inc"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "com04_c.inc"
#include      "param_c.inc"
#include      "vect01_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER :: NEL 
      INTEGER , DIMENSION(NEL) ::  PID,MAT
      my_real , DIMENSION(NEL) ::  deltax, aire, vol, dtx 
      my_real  :: pm(npropm,nummat),geo(npropg,numgeo) 
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I, MX
C     REAL
      my_real
     .   rho0(mvsiz), gs, nu, c1, ssp(mvsiz), vis(mvsiz)
C=======================================================================
      mx = mat(1)
      gs = pm(22,mx)
      nu = pm(21,mx)
      c1 = third*gs*(one + nu)/(one - two*nu)
      DO i=lft,llt
        rho0(i) = pm( 1,mx)
        vis(i)  = zero
      END DO
C-----------------------------
C     CALCUL DE VITESSE DU SON
C-----------------------------
      DO i=lft,llt
        ssp(i)=sqrt((four_over_3*gs+c1)/rho0(i))
      END DO
C----------------------------------
C     CALCUL DES DT ELEMENTAIRES
C----------------------------------
      IF(jsph==0)THEN
         CALL dtel(ssp,pm,geo,pid,mat, rho0, vis, deltax, aire, vol, dtx)
      ELSE
         CALL dtsph(ssp,pm,geo,pid,mat, rho0, vis, deltax, vol, dtx)
      ENDIF
C-----------
      RETURN
      END