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 extrapol_pel3(ielfa,xrlfa,icyclic,ifatie,gradpfa, 20 & gradpel,c,ipnei,xxi,nfacea,nfaceb,ncfd) 21! 22! interpolate/extrapolate the pressure gradient from the 23! center of the elements to the center of the faces 24! 25 implicit none 26! 27 integer ielfa(4,*),icyclic,ifatie(*),ipnei(*),nfacea,nfaceb, 28 & iel1,iel2,i,l,indexf,ncfd 29! 30 real*8 xrlfa(3,*),gradpfa(3,*),gradpel(3,*),c(3,3),xxi(3,*), 31 & gradnor,xl1,xl2 32! 33! 34! 35 do i=nfacea,nfaceb 36 iel1=ielfa(1,i) 37 xl1=xrlfa(1,i) 38 iel2=ielfa(2,i) 39 if(iel2.gt.0) then 40! 41! face in between two elements 42! 43 xl2=xrlfa(2,i) 44 if((icyclic.eq.0).or.(ifatie(i).eq.0)) then 45 do l=1,ncfd 46 gradpfa(l,i)=xl1*gradpel(l,iel1)+ 47 & xl2*gradpel(l,iel2) 48 enddo 49 elseif(ifatie(i).gt.0) then 50 do l=1,ncfd 51 gradpfa(l,i)=xl1*gradpel(l,iel1)+xl2* 52 & (gradpel(1,iel2)*c(l,1)+ 53 & gradpel(2,iel2)*c(l,2)+ 54 & gradpel(3,iel2)*c(l,3)) 55 enddo 56 else 57 do l=1,ncfd 58 gradpfa(l,i)=xl1*gradpel(l,iel1)+xl2* 59 & (gradpel(1,iel2)*c(1,l)+ 60 & gradpel(2,iel2)*c(2,l)+ 61 & gradpel(3,iel2)*c(3,l)) 62 enddo 63 endif 64 elseif(ielfa(3,i).ne.0) then 65! 66! boundary face; more than one layer; extrapolation 67! 68 do l=1,ncfd 69 gradpfa(l,i)=xl1*gradpel(l,iel1)+ 70 & xrlfa(3,i)*gradpel(l,abs(ielfa(3,i))) 71 enddo 72 else 73! 74! boundary face; one layer 75! 76 indexf=ipnei(iel1)+ielfa(4,i) 77 gradnor=gradpel(1,iel1)*xxi(1,indexf)+ 78 & gradpel(2,iel1)*xxi(2,indexf)+ 79 & gradpel(3,iel1)*xxi(3,indexf) 80 do l=1,ncfd 81 gradpfa(l,i)=gradpel(l,iel1) 82 & -gradnor*xxi(l,indexf) 83 enddo 84 endif 85 enddo 86! 87 return 88 end 89