# Flow around a heated cylinder

 Register Blogs Members List Search Today's Posts Mark Forums Read

August 25, 2010, 11:02
Flow around a heated cylinder
#1
New Member

Join Date: Jul 2010
Posts: 11
Rep Power: 8
Hi Foamers,

I have to run a case of a flow past a heated cylinder with rhoPisoFoam. The air temperature is 300K and the wall temperature is 340K.
The velocity is 1 m/s.
After some iterations (less than 10) I have an error:

Time = 0.09132

diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCG: Solving for Ux, Initial residual = 0.996377, Final residual = 9.70033e-06, No Iterations 269
DILUPBiCG: Solving for Uy, Initial residual = 0.997456, Final residual = 8.79396e-06, No Iterations 277
DILUPBiCG: Solving for h, Initial residual = 0.948008, Final residual = 8.83847e-06, No Iterations 847

--> FOAM FATAL ERROR:
Maximum number of iterations exceeded

From function specieThermo<thermo>::T(scalar f, scalar T0, scalar (specieThermo<thermo>::*F)(const scalar) const, scalar (specieThermo<thermo>::*dFdT)(const scalar) const) const
in file /home/opencfd/OpenFOAM/OpenFOAM-1.7.0/src/thermophysicalModels/specie/lnInclude/specieThermoI.H at line 67.

FOAM aborting

#0 Foam::error:rintStack(Foam::Ostream&) in "/opt/openfoam170/lib/linuxGccDPOpt/libOpenFOAM.so"
#1 Foam::error::abort() in "/opt/openfoam170/lib/linuxGccDPOpt/libOpenFOAM.so"
#2 Foam::hPsiThermo<Foam:ureMixture<Foam::constTran sport<Foam::specieThermo<Foam::hConstThermo<Foam:: perfectGas> > > > >::calculate() in "/opt/openfoam170/lib/linuxGccDPOpt/libbasicThermophysicalModels.so"
#3 Foam::hPsiThermo<Foam:ureMixture<Foam::constTran sport<Foam::specieThermo<Foam::hConstThermo<Foam:: perfectGas> > > > >::correct() in "/opt/openfoam170/lib/linuxGccDPOpt/libbasicThermophysicalModels.so"
#4
in "/opt/openfoam170/applications/bin/linuxGccDPOpt/rhoPisoFoam"
#5 __libc_start_main in "/lib/tls/i686/cmov/libc.so.6"
#6
in "/opt/openfoam170/applications/bin/linuxGccDPOpt/rhoPisoFoam"
Abandon

I think I have a problem with my BC. Can you help me? Please find enclosed my case.
Cynthia.
Attached Files
 0.tar.gz (1.7 KB, 28 views) constant.tar.gz (746 Bytes, 22 views) system.tar.gz (2.8 KB, 22 views)

 September 8, 2010, 09:54 #2 Member   Costas K Join Date: Nov 2009 Location: UK Posts: 51 Rep Power: 8 Maybe try changing adjustTimeStep no;, into adjustTimeStep yes; so as it adjusts the timestep according to the maximum Courant number you set.

 September 9, 2010, 04:52 #3 New Member   Join Date: Jul 2010 Posts: 11 Rep Power: 8 Thanks a lot thekay. I have decreased my courant number and it works well!

 September 28, 2010, 21:33 #4 Member   Join Date: Nov 2009 Posts: 37 Rep Power: 8 which turbulence model are you using and what are your BC's?

 Tags cylinder, heat, rhopisofoam

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post goodegg Main CFD Forum 12 January 22, 2013 12:47 Jwolf CFX 19 November 25, 2009 15:21 Wenxuan Main CFD Forum 3 March 20, 2007 17:19 Khyati Main CFD Forum 0 July 12, 2006 00:17 Anna Main CFD Forum 9 March 24, 2006 15:32

All times are GMT -4. The time now is 21:05.