1! 2! CalculiX - A 3-dimensional finite element program 3! Copyright (C) 1998-2021 Guido Dhondt 4! 5! This program is free software; you can redistribute it and/or 6! modify it under the terms of the GNU General Public License as 7! published by the Free Software Foundation(version 2); 8! 9! 10! This program is distributed in the hope that it will be useful, 11! but WITHOUT ANY WARRANTY; without even the implied warranty of 12! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13! GNU General Public License for more details. 14! 15! You should have received a copy of the GNU General Public License 16! along with this program; if not, write to the Free Software 17! Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18! 19 subroutine hrr_ud(vfa,shcon,ielmat,ntmat_, 20 & mi,ielfa,ipnei,vel,nef,flux,nfacea,nfaceb,xxi,xle, 21 & gradpel,gradtel,neij) 22! 23! calculation of the density at the face centers 24! (compressible fluids) 25! 26! facial temperature and pressure is only used for external 27! faces 28! 29 implicit none 30! 31 integer i,j,imat,ntmat_,mi(*),ipnei(*),nef,iel1,iel2, 32 & ielmat(mi(3),*),ielfa(4,*),indexf,nfacea,nfaceb,neij(*) 33! 34 real*8 t1l,vfa(0:7,*),shcon(0:3,ntmat_,*),vel(nef,0:7),flux(*), 35 & r,dd,xxv(3),xxi(3,*),qp(3),p,t,xle(*),gradpel(3,*), 36 & gradtel(3,*) 37! 38! 39! 40 do i=nfacea,nfaceb 41! 42 iel2=ielfa(2,i) 43! 44! take the material of the first adjacent element 45! 46 imat=ielmat(1,ielfa(1,i)) 47 r=shcon(3,1,imat) 48! 49! no neighbor 50! 51 if(iel2.le.0) then 52 t1l=vfa(0,i) 53! 54! take the material of the first adjacent element 55! 56 imat=ielmat(1,ielfa(1,i)) 57 r=shcon(3,1,imat) 58! 59! specific gas constant 60! 61 vfa(5,i)=vfa(4,i)/(r*vfa(0,i)) 62 cycle 63 endif 64! 65! neighbor 66! 67 iel1=ielfa(1,i) 68 j=ielfa(4,i) 69 indexf=ipnei(iel1)+j 70! 71 if(flux(indexf).ge.0.d0) then 72! 73! outflow 74! 75c vfa(5,i)=vel(iel1,5) 76 vfa(5,i)=vel(iel1,4)/(r*vfa(0,i)) 77 elseif(iel2.gt.0) then 78! 79! inflow && neighbor 80! 81c vfa(5,i)=vel(iel2,5) 82 vfa(5,i)=vel(iel2,4)/(r*vfa(0,i)) 83 endif 84! 85 enddo 86! 87 return 88 end 89