[Nek5000-users] Setting self-defined variable properties in USERVP

[nek5000-users at lists.mcs.anl.gov]

Hello,neks
In my simulation, fluid density 'Rho', dynamic viscosity 'Visco', thermal diffusivity 'Conduct' are all the function of the temperature, so I define them in USERVP as below:

    subroutine uservp (ix,iy,iz,ieg)
      include 'SIZE'
      include 'TOTAL'
      include 'NEKUSE'
     
      common /nob_coef/Kn(1:3),Bn(1:3),Cn(1:3),Dn(1:3),
     $                    En(1:3),Fn(1:3)
      common /constant/Rhom,Cpm,Tm,Alpham,Kappam,Km,
     $                    Viscom,delta_T,rho0
      real*8 Kn,Bn,Cn,Dn,En,Fn,
     $       Rhom,Cpm,Tm,Alpham,Kappam,Km,
     $         Viscom,delta_T,rho0     
      integer i,j,k,e,n,iel

     
      Rhom = 0.9922*1e3
      Cpm = 4.1690*1e3
      Alpham = 3.8810*1e-4
      Km = 0.6297
      Kappam = 0.1528*1e-6
      Viscom = 0.669*1e-6
      Tm = 40
     
      Kn=[ -175.9*1e-4,295.8*1e-6,-460*1e-8]
      Bn=[23.52*1e-4,-14.9*1e-6,0.]
      Cn= [-3.736*1e3,-3.98*1e3,0.]
      Dn= [0.084*1e3,4.6*1e3,0.]
      En = [195*1e-4,-159.8*1e-4,207*1e-4]
      Fn=[21.99,-17.8,0.]

      iel=gllel(ieg)
      if (IFIELD.eq. 1)then
      udiff  = Rhom
      utrans = 0.
      rho0 = 0.
      do i=1,3
      utrans = utrans + Kn(i)*((temp-0.5)*delta_T)**i
      rho0 = rho0 + Cn(i)*((temp-0.5)*delta_T)**i
      enddo
     
      utrans=utrans*Viscom+Viscom
      rho0=rho0*Rhom+Rhom
      utrans=utrans*rho0
      endif
      if (IFIELD.eq. 2)then
      udiff  = Rhom*Cpm
      utrans = 0.
      do i=1,3
      utrans = utrans + Fn(i)*((temp-0.5)*delta_T)**i
      enddo 
      utrans=utrans*Km+Km
      endif
     
      return
      end

  then I set p30=1 in .rea file. But the program cannot run, it seems that some errors occured when reading .rea file. I know from the user guide that variable properties are supported but I am little confused about if the properties which are the functions of other flow field variables(like u, v, w or temperature) also can be set correctly in USERVP. Did anyone meet problems like this before? Any help is appreciated.


regards,
Xu

--
Xu Bolun,
University of Science and Technology of China,
Hefei,Anhui,China
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/nek5000-users/attachments/20161101/995efe9c/attachment.html>