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!
! CalculiX - A 3-dimensional finite element program
! Copyright (C) 1998-2015 Guido Dhondt
!
! This program is free software; you can redistribute it and/or
! modify it under the terms of the GNU General Public License as
! published by the Free Software Foundation(version 2);
!
!
! This program is distributed in the hope that it will be useful,
! but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! GNU General Public License for more details.
!
! You should have received a copy of the GNU General Public License
! along with this program; if not, write to the Free Software
! Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
!
subroutine cfds(inpc,textpart,nmethod,
& iperturb,isolver,
& istep,istat,n,tinc,tper,tmin,tmax,idrct,ithermal,iline,ipol,
& inl,ipoinp,inp,ipoinpc,alpha,ctrl,iexpl,tincf,ttime)
!
! reading the input deck: *CFD
!
! isolver=0: SPOOLES
! 2: iterative solver with diagonal scaling
! 3: iterative solver with Cholesky preconditioning
! 4: sgi solver
! 5: TAUCS
! 7: pardiso
!
! iexpl==0: structure:implicit, fluid:incompressible
! iexpl==1: structure:implicit, fluid:compressible
!
implicit none
!
logical timereset
!
character*1 inpc(*)
character*20 solver
character*132 textpart(16)
!
integer nmethod,iperturb,isolver,istep,istat,n,key,i,idrct,
& ithermal,iline,ipol,inl,ipoinp(2,*),inp(3,*),ipoinpc(0:*),
& iexpl
!
real*8 tinc,tper,tmin,tmax,alpha,ctrl(*),tincf,ttime
!
idrct=0
alpha=-0.05d0
tmin=0.d0
tmax=0.d0
tincf=-1.d0
nmethod=4
timereset=.false.
!
if(iperturb.eq.0) then
iperturb=2
elseif((iperturb.eq.1).and.(istep.gt.1)) then
write(*,*) '*ERROR reading *CFD: perturbation analysis is'
write(*,*) ' not provided in a *HEAT TRANSFER step.'
call exit(201)
endif
!
if(istep.lt.1) then
write(*,*) '*ERROR reading *CFD: *HEAT TRANSFER can only '
write(*,*) ' be used within a STEP'
call exit(201)
endif
!
! default solver
!
solver=' '
if(isolver.eq.0) then
solver(1:7)='SPOOLES'
elseif(isolver.eq.2) then
solver(1:16)='ITERATIVESCALING'
elseif(isolver.eq.3) then
solver(1:17)='ITERATIVECHOLESKY'
elseif(isolver.eq.4) then
solver(1:3)='SGI'
elseif(isolver.eq.5) then
solver(1:5)='TAUCS'
elseif(isolver.eq.7) then
solver(1:7)='PARDISO'
endif
!
do i=2,n
if(textpart(i)(1:7).eq.'SOLVER=') then
read(textpart(i)(8:27),'(a20)') solver
elseif(textpart(i)(1:12).eq.'COMPRESSIBLE') then
iexpl=1
elseif(textpart(i)(1:11).eq.'STEADYSTATE') then
nmethod=1
elseif(textpart(i)(1:9).eq.'TIMERESET') then
timereset=.true.
elseif(textpart(i)(1:17).eq.'TOTALTIMEATSTART=') then
read(textpart(i)(18:37),'(f20.0)',iostat=istat) ttime
else
write(*,*)
& '*WARNING reading *CFD: parameter not recognized:'
write(*,*) ' ',
& textpart(i)(1:index(textpart(i),' ')-1)
call inputwarning(inpc,ipoinpc,iline,
&"*CFD%")
endif
enddo
if(nmethod.eq.1) ctrl(27)=1.d30
!
if((ithermal.eq.0).and.(iexpl.eq.1)) then
write(*,*) '*ERROR reading *CFD: please define initial '
write(*,*) ' conditions for the temperature'
call exit(201)
elseif(ithermal.gt.0) then
ithermal=3
endif
!
if(solver(1:7).eq.'SPOOLES') then
isolver=0
elseif(solver(1:16).eq.'ITERATIVESCALING') then
isolver=2
elseif(solver(1:17).eq.'ITERATIVECHOLESKY') then
isolver=3
elseif(solver(1:3).eq.'SGI') then
isolver=4
elseif(solver(1:5).eq.'TAUCS') then
isolver=5
elseif(solver(1:7).eq.'PARDISO') then
isolver=7
else
write(*,*) '*WARNING reading *CFD: unknown solver;'
write(*,*) ' the default solver is used'
endif
!
call getnewline(inpc,textpart,istat,n,key,iline,ipol,inl,
& ipoinp,inp,ipoinpc)
if((istat.lt.0).or.(key.eq.1)) then
if(nmethod.eq.4) then
!
! transient cfd
!
write(*,*) '*WARNING reading *CFD: a nonlinear geometric
& analysis is requested'
write(*,*) ' but no time increment nor step is speci
&fied'
write(*,*) ' the defaults (1,1) are used'
tinc=1.d0
tper=1.d0
tmin=1.d-5
tmax=1.d+30
tincf=-1.d0
elseif(nmethod.eq.1) then
!
! steady state cfd: initial increment time and step
! time are set to large values since only the first
! increment is calculated
!
tinc=1.d+30
tper=1.d+30
tmin=1.d-5
tmax=1.d+30
tincf=-1.d0
endif
if(timereset)ttime=ttime-tper
return
endif
!
read(textpart(1)(1:20),'(f20.0)',iostat=istat) tinc
if(istat.gt.0) call inputerror(inpc,ipoinpc,iline,
&"*CFD%")
read(textpart(2)(1:20),'(f20.0)',iostat=istat) tper
if(istat.gt.0) call inputerror(inpc,ipoinpc,iline,
&"*CFD%")
read(textpart(3)(1:20),'(f20.0)',iostat=istat) tmin
if(istat.gt.0) call inputerror(inpc,ipoinpc,iline,
&"*CFD%")
read(textpart(4)(1:20),'(f20.0)',iostat=istat) tmax
if(istat.gt.0) call inputerror(inpc,ipoinpc,iline,
&"*CFD%")
read(textpart(5)(1:20),'(f20.0)',iostat=istat) tincf
if(istat.gt.0) call inputerror(inpc,ipoinpc,iline,
&"*CFD%")
!
if(tinc.le.0.d0) then
write(*,*) '*ERROR reading *CFD: initial increment size is
&negative'
endif
if(tper.le.0.d0) then
write(*,*) '*ERROR reading *CFD: step size is negative'
endif
if(tinc.gt.tper) then
write(*,*) '*ERROR reading *CFD: initial increment size exc
&eeds step size'
endif
!
if(idrct.ne.1) then
if(dabs(tmin).lt.1.d-6*tper) then
tmin=min(tinc,1.d-6*tper)
endif
if(dabs(tmax).lt.1.d-10) then
tmax=1.d+30
endif
endif
!
if(timereset)ttime=ttime-tper
!
call getnewline(inpc,textpart,istat,n,key,iline,ipol,inl,
& ipoinp,inp,ipoinpc)
!
return
end
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