CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

LES of confined flows - floating point error

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 22, 2007, 10:39
Default LES of confined flows - floating point error
  #1
ugandhar
Guest
 
Posts: n/a
Hi,

I am running LES of unsteady flow in a sudden expansion chamber with the parallel version on a dual core windows machine. I had run the simulation on a coarser grid earlier (8000 time steps). However, while running the asme on a finer mesh the program stops around 5500 time steps (almost 2/3rd) with the message

'floating point error - divide by zero'. This is strange as all the inputs were the same as the previous case.

could it be a limitation of the system??

Hoping to hear from u guys soon...
  Reply With Quote

Old   April 23, 2007, 10:36
Default Re: LES of confined flows - floating point error
  #2
SV
Guest
 
Posts: n/a
Instead of starting the simulation again from beginning..try interpolating the results of the coarse mesh to the fine mesh and then start the simulation. I had the same problem and this helped.
  Reply With Quote

Old   April 24, 2007, 09:59
Default Re: LES of confined flows - floating point error
  #3
ugandhar
Guest
 
Posts: n/a
thanks for the suggestion. could you tell me how to interpolate the results from the coarser mesh to the finer mesh.

thanks in advance
  Reply With Quote

Old   April 24, 2007, 10:16
Default Re: LES of confined flows - floating point error
  #4
SV
Guest
 
Posts: n/a
First write out the data fields in the fluid zone that you want to interpolate; file/interpolate This will open a Gui and show you the fluid zones you have and the data fields that can be written... Once you write the data...read the finer mesh and then read the data set you wrote by using the same file/interpolate...then read and interpolate command. If you have access to fluent user manual ..the procedure is clearly outlined in section 33.1.40
  Reply With Quote

Reply

Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Simulation of DMFC in fluent hqqicedream FLUENT 2 April 5, 2012 01:57
ParaView for OF-1.6-ext Chrisi1984 OpenFOAM Installation 0 December 31, 2010 07:42
Installation of Netgen in SuSE Linux 92 edvardsenpriv Open Source Meshers: Gmsh, Netgen, CGNS, ... 23 January 16, 2009 07:12
Problem with compile the setParabolicInlet ivanyao OpenFOAM Running, Solving & CFD 6 September 5, 2008 20:50
Gmsh and samplesurface touf Open Source Meshers: Gmsh, Netgen, CGNS, ... 2 December 10, 2007 03:27


All times are GMT -4. The time now is 07:32.