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

chtMultiRegionFoam in of6 Simple Mode

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 29, 2019, 09:58
Default chtMultiRegionFoam in of6 Simple Mode
  #1
New Member
 
Arslan Adeel Ur Rehmann
Join Date: Jun 2018
Posts: 9
Rep Power: 7
arslanadeel is on a distinguished road
Hi



Quick Question



Can anyone one guide me how to run chtMultiRegionFoam in openFoam 6 in steadyState mode, with Simple algorithm.



PS: I have a high velocity so I want to get rid of CFL number.



Thanks
arslanadeel is offline   Reply With Quote

Old   July 30, 2019, 12:32
Default
  #2
Senior Member
 
Peter Baskovich
Join Date: Jul 2014
Posts: 127
Rep Power: 11
pete20r2 is on a distinguished road
What you've done is ask a quick question asking for a long response.
chtMultiRegionFoam uses PIMPLE, you don't get to choose which algorithm is used unless you compile yourself.
You can use steadyState or localEuler time schemes to obtain steady-state solutions with a transient solver.
I'd suggest using localEuler, setting maxCo to 0.5 and setting up residual control.
pete20r2 is offline   Reply With Quote

Old   August 1, 2019, 04:25
Default
  #3
Member
 
Owais Shabbir
Join Date: May 2019
Posts: 48
Rep Power: 6
Owais Shabbir is on a distinguished road
Hi,
I am also trying to run steady state. Are there any tutorials involving steady-state? I am using OFv6 and I can't find any steady-state tutorials.

I have few questions regarding chtMultiRegionFoam


Why all the tutorials are using p_rgh as defining the B.C. and then calculating the p?


Please
Thanks

Owais
Owais Shabbir is offline   Reply With Quote

Old   February 24, 2021, 15:56
Default
  #4
Senior Member
 
julien
Join Date: Dec 2018
Posts: 107
Rep Power: 7
julieng is on a distinguished road
Hello,

What is the reason to have choose the PIMPLE loop to reach steady state?
The old chtMultiRegioSimpleFoam outperforms in term of computation time chtMultiRegionFoam for steady cases.
With high density solid and Co number close to 1 it takes days to reach steady states....
Maybe someone knows how to set up properly the PIMPLE to have same efficiency than SIMPLE?

Julien
julieng is offline   Reply With Quote

Reply

Tags
cfl-number, chtmultiregionfoam, openfoam 6, steady state

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
Continuity divergence in simple gas flow Okka FLUENT 7 January 11, 2019 01:01
Custom boundary condition: unexpected behavior with chtMultiRegionFoam leroyv OpenFOAM Programming & Development 3 February 1, 2014 07:49
Different results in parallel/serial mode kpax OpenFOAM Running, Solving & CFD 1 October 22, 2012 06:22
Timestep and Pressure Correction Relationship in SIMPLE rks171 Main CFD Forum 23 May 4, 2012 01:04
SIMPLE algorithm Jonathan Castro Main CFD Forum 3 December 10, 1999 04:59


All times are GMT -4. The time now is 22:54.