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  • src/1d/equations/euler/rpm/flgout1eum.f

    c
    c     ==========================================================
          subroutine flgout1eum(q,mx,lb,ub,qo,mxo,lbo,ubo,
         &     lbr,ubr,shaper,meqn,nc,t)
    c     ==========================================================
    c
    c     # Computes primitives for two-component Euler equations 
    c     # for output and flagging.
    c
    c     # Copyright (C) 2002 Ralf Deiterding
    c     # Brandenburgische Universitaet Cottbus
    c
    c     # Copyright (C) 2003-2007 California Institute of Technology
    c     # Ralf Deiterding, ralf@cacr.caltech.edu
    c
          implicit double precision(a-h,o-z)
          common /PhysData/  Wk, g, pinf, RU, PA
          dimension Wk(2), g(2), pinf(2)
    c
          integer meqn, mx, mxo
          dimension q(meqn,mx), qo(mxo)
          dimension Xk(2), cap(2)
    c
          integer  lb(1), ub(1), lbo(1), ubo(1), lbr(1), ubr(1), shaper(1), 
         &     mresult, stride, imin(1), imax(1), i, getindx, d
    c
          stride = (ub(1) - lb(1))/(mx-1)
    
          imin(1) = max(lb(1), lbr(1))
          imax(1) = min(ub(1), ubr(1))
          
          if (mod(imin(1)-lb(1),stride) .ne. 0) then
             imin(1) = imin(1) + stride - mod(imin(1)-lb(1),stride) 
          endif
          imin(1) = getindx(imin(1), lb(1), stride)  
             
          if (mod(imax(1)-lb(1),stride) .ne. 0) then
             imax(1) = imax(1) - mod(imax(1)-lb(1),stride) 
          endif
          imax(1) = getindx(imax(1), lb(1), stride)  
    c
          cap(1) = 1.d0 / (g(1)-1.d0)
          cap(2) = 1.d0 / (g(2)-1.d0)
    c
          do 10 i = imin(1), imax(1)
             if (nc.gt.3) then
                gamma1 = 1.d0 / q(4,i)
                gamma = gamma1 + 1.d0
                p = gamma1*(q(3,i)-0.5d0*(q(2,i)**2)/q(1,i)-q(5,i))
                pin = q(5,i)*gamma1/gamma
                Xk(1) = (q(4,i)-cap(2)) / (cap(1)-cap(2))
                Xk(2) = 1.d0-Xk(1)
                W = Xk(1)*Wk(1) + Xk(2)*Wk(2)
             endif
    c
    c        # Density
             if (nc.eq.1) qo(i) = q(1,i)
    c        # Velocity
             if (nc.eq.2) qo(i) = q(2,i)/q(1,i)
    c        # Total energy density
             if (nc.eq.3) qo(i) = q(3,i)
    c        # Temperature 
             if (nc.eq.4) qo(i) = p/(q(1,i)*RU/W)
    c        # Pressure
             if (nc.eq.5) qo(i) = p
    c        # Gamma 
             if (nc.eq.6) qo(i) = gamma
    c        # Y1
             if (nc.eq.7) qo(i) = Xk(1)*Wk(1)/W
    c        # Y2
             if (nc.eq.8) qo(i) = Xk(2)*Wk(2)/W
    c        # pinf
             if (nc.eq.9) qo(i) = pin
    c        # Speed of sound
             if (nc.eq.10) qo(i) = dsqrt(gamma*(p+pin)/q(1,i))
     10   continue         
    
          return
          end
    

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