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claw1ez.f.html |
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Source file: claw1ez.f
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Directory: /home/rjl/git/rjleveque/clawpack-4.x/clawpack/1d/lib
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Converted: Sun May 15 2011 at 19:15:42
using clawcode2html
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This documentation file will
not reflect any later changes in the source file.
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c
c
c
c ===============================================================
subroutine claw1ez(maxmx,meqn,mwaves,mbc,maux,mwork,mthlim,
& q,work,aux)
c ===============================================================
c
c An easy-to-use clawpack driver routine for simple applications
c Documentation is available at
c http://www.amath.washington.edu/~claw/doc.html
c
c Author: Randall J. LeVeque
c Version of August, 2002 -- CLAWPACK Version 4.1
c
implicit double precision (a-h,o-z)
external bc1,rp1,src1,b4step1
dimension q(1-mbc:maxmx+mbc, meqn)
dimension aux(1-mbc:maxmx+mbc, maux)
dimension work(mwork)
dimension mthlim(mwaves)
c
dimension method(7),dtv(5),cflv(4),nv(2),mthbc(2)
dimension tout(100)
logical outt0
character*12 fname
c
open(10,file='fort.info',status='unknown',form='formatted')
c
c # Read the input in standard form from claw.data:
c # For a description of input parameters see the documentation at
c http://www.amath.washington.edu/~claw
c ## New in 4.4: Input file name changed from claw1ez.data
c ## Open file and skip over leading lines with # comments:
fname = 'claw.data'
call opendatafile(55,fname)
c
c Number of space dimensions: ## New in 4.4
read(55,*) ndim
c
c ## The remainder is unchanged from 4.3:
c Number of grid cells:
read(55,*) mx
c i/o variables
read(55,*) nout
read(55,*) outstyle
if (outstyle.eq.1) then
read(55,*) tfinal
nstepout = 1
elseif (outstyle.eq.2) then
read(55,*) (tout(i), i=1,nout)
nstepout = 1
elseif (outstyle.eq.3) then
read(55,*) nstepout, nstop
nout = nstop
endif
c timestepping variables
read(55,*) dtv(1)
read(55,*) dtv(2)
read(55,*) cflv(1)
read(55,*) cflv(2)
read(55,*) nv(1)
c
c # input parameters for clawpack routines
read(55,*) method(1)
read(55,*) method(2)
read(55,*) method(3)
read(55,*) method(4)
read(55,*) method(5)
read(55,*) method(6)
read(55,*) method(7)
read(55,*) meqn1
read(55,*) mwaves1
read(55,*) (mthlim(mw), mw=1,mwaves1)
c # physical domain:
read(55,*) t0
read(55,*) xlower
read(55,*) xupper
c
c # boundary conditions:
read(55,*) mbc1
read(55,*) mthbc(1)
read(55,*) mthbc(2)
if (method(7) .ne. maux) then
write(6,*) '*** ERROR *** maux set wrong in input or driver'
stop
endif
if (meqn1 .ne. meqn) then
write(6,*) '*** ERROR *** meqn set wrong in input or driver'
stop
endif
if (mwaves1 .ne. mwaves) then
write(6,*) '*** ERROR *** mwaves set wrong in input or driver'
stop
endif
if (mbc1 .ne. mbc) then
write(6,*) '*** ERROR *** mbc set wrong in input or driver'
stop
endif
c
if ((mthbc(1).eq.2 .and. mthbc(2).ne.2) .or.
& (mthbc(2).eq.2 .and. mthbc(1).ne.2)) then
write(6,*) '*** ERROR *** periodic boundary conditions'
write(6,*) ' require mthbc(1) and mthbc(2) BOTH be set to 2'
stop
endif
c
c # check that enough storage has been allocated:
c
mwork1 = (maxmx + 2*mbc) * (2 + 4*meqn + mwaves + meqn*mwaves)
c
if (mx.gt.maxmx .or. mwork.lt.mwork1) then
c # insufficient storage
maxmx1 = max0(mx,maxmx)
mwork1 = (maxmx1 + 2*mbc) * (2 + 4*meqn + mwaves + meqn*mwaves)
write(6,*) ' '
write(6,*) '*** ERROR *** Insufficient storage allocated'
write(6,*) 'Recompile after increasing values in driver.f:'
write(6,611) maxmx1
write(6,613) mwork1
611 format(/,'parameter (maxmx = ',i5,')')
613 format('parameter (mwork = ',i7,')',/)
stop
endif
c
c
write(6,*) 'running...'
write(6,*) ' '
c
c # grid spacing
dx = (xupper - xlower) / float(mx)
c
c # time increments between outputing solution:
if (outstyle .eq. 1) then
dtout = (tfinal - t0)/float(nout)
endif
c
c
c # call user's routine setprob to set any specific parameters
c # or other initialization required.
c
call setprob
c
c # set aux array:
c
if (maux .gt. 0) then
call setaux(maxmx,mbc,mx,xlower,dx,maux,aux)
endif
c
c # set initial conditions:
c
call qinit(maxmx,meqn,mbc,mx,xlower,dx,q,maux,aux)
c
outt0 = .true.
if (outt0) then
c # output initial data
call out1(maxmx,meqn,mbc,mx,xlower,dx,q,t0,0,aux,maux)
write(6,601) 0, t0
endif
c
c ----------
c Main loop:
c ----------
c
tend = t0
do 100 n=1,nout
tstart = tend
if (outstyle .eq. 1) tend = tstart + dtout
if (outstyle .eq. 2) tend = tout(n)
if (outstyle .eq. 3) tend = tstart - 1.d0 !# single-step mode
c
call claw1(maxmx,meqn,mwaves,mbc,mx,
& q,aux,xlower,dx,tstart,tend,dtv,cflv,nv,method,mthlim,
& mthbc,work,mwork,info,bc1,rp1,src1,b4step1)
c
c # check to see if an error occured:
if (info .ne. 0) then
write(6,*) '*** ERROR in claw1 *** info =',info
if (info.eq.1) then
write(6,*) '*** either mx > maxmx or mbc < 2'
endif
if (info.eq.2) then
write(6,*) '*** dt does not divide (tend - tstart)'
write(6,*) '*** and dt is fixed since method(1)=0'
endif
if (info.eq.3) then
write(6,*) '*** method(1)=1 and cflv(2) > cflv(1)'
endif
if (info.eq.4) then
write(6,*) '*** mwork is too small'
endif
if (info.eq.11) then
write(6,*) '*** Too many times steps, n > nv(1)'
endif
if (info.eq.12) then
write(6,*)
& '*** The Courant number is greater than cflv(1)'
write(6,*) '*** and dt is fixed since method(1)=0'
endif
go to 999
endif
c
dtv(1) = dtv(5) !# use final dt as starting value on next call
c
c # output solution at this time
c ------------------------------
c
c # if outstyle=1 or 2, then nstepout=1 and we output every time
c # we reach this point, since claw1 was called for the entire time
c # increment between outputs.
c
c # if outstyle=3 then we only output if we have taken nstepout
c # time steps since the last output.
c # iframe is the frame number used to form file names in out1
iframe = n/nstepout
if (iframe*nstepout .eq. n) then
call out1(maxmx,meqn,mbc,mx,xlower,dx,q,tend,iframe,
& aux,maux)
write(6,601) iframe,tend
write(10,1010) tend,info,dtv(3),dtv(4),dtv(5),
& cflv(3),cflv(4),nv(2)
endif
c
c # formats for writing out information about this call to claw:
c
601 format('CLAW1EZ: Frame ',i4,
& ' output files done at time t =',
& d12.4,/)
c
1010 format('tend =',d15.4,/,
& 'info =',i5,/,'smallest dt =',d15.4,/,'largest dt =',
& d15.4,/,'last dt =',d15.4,/,'largest cfl =',
& d15.4,/,'last cfl =',d15.4,/,'steps taken =',i4,/)
c
100 continue
c
999 continue
c
return
end