CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

Radiation in large scale fire

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

Like Tree1Likes
  • 1 Post By Roman1

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 13, 2020, 03:12
Default Radiation in large scale fire
  #1
Member
 
Roman
Join Date: Sep 2013
Posts: 81
Rep Power: 12
Roman1 is on a distinguished road
Hello! I am modelling radiation of large scale fire. The burner is a cylinder of 150 m height.
The parameter to be found is 'G'. Radiation model -fvDOM, firefOAM.The running stops or does not start at all when the domain size exceeds some values. These are 120x70x150 meters, nPhi, nTheta=5, decomposed for running at 8 cores. It just writes 'process killed'. One must decrease number
of angles or cells. I would like to know what kind of restriction works here. For the truth, domain needed size is two times much. Thanks/
Roman1 is offline   Reply With Quote

Old   August 14, 2020, 11:44
Default
  #2
Senior Member
 
cdegroot's Avatar
 
Chris DeGroot
Join Date: Nov 2011
Location: Canada
Posts: 414
Rep Power: 17
cdegroot is on a distinguished road
You are most likely running out of memory, since the FVDOM model requires one field for each of the angular directions. You either have to reduce the angular discretization or obtain more memory.
__________________
Chris DeGroot, PhD, PEng
CEO, Maple Key Labs
www.maplekeylabs.com
cdegroot is offline   Reply With Quote

Old   August 15, 2020, 03:08
Default
  #3
Member
 
Roman
Join Date: Sep 2013
Posts: 81
Rep Power: 12
Roman1 is on a distinguished road
Thanks. You are absolutely right. I have looked at system monitor. All 8Gb is busy. Without even a small residual.
cdegroot likes this.
Roman1 is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Decomposition Methods: which ones are best for large scale simulations? misakagan OpenFOAM Running, Solving & CFD 9 December 14, 2023 02:36
UDF value to large for defined data type Anna73 Fluent UDF and Scheme Programming 9 September 30, 2018 22:18
Large Scale CFD Simulations maybee Main CFD Forum 3 May 30, 2014 17:46
What method use to modelate a side-entry impeller in a large scale mixing tank? fcabrales Main CFD Forum 0 January 29, 2010 14:24
About Large Scale Domains Swarup FLUENT 10 October 4, 2006 23:09


All times are GMT -4. The time now is 18:53.