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

Velocity components residuals are missing when running with interDyMFoam

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

Like Tree1Likes
  • 1 Post By wyldckat

Reply
 
LinkBack Thread Tools Display Modes
Old   October 16, 2015, 12:37
Smile Velocity components residuals are missing when running with interDyMFoam
  #1
New Member
 
Vincenzo
Join Date: Oct 2012
Location: Palermo (IT)
Posts: 4
Rep Power: 5
vsammartano is on a distinguished road
Hi there,
I'm quite new to OpenFOAM and I am working on a CFD simulation of a Cross-Flow water Turbine. I have created the OpenFOAM case and the simulation seems to work fine. BUT, during the simulation, in the terminal I can't read the residual of the velocity components. I know that the solver computes those unknowns, I want see these residuals during the simulation.
How can I do that!?
Thanks in advance!
PS: I am using the interDyMFoam solver
vsammartano is offline   Reply With Quote

Old   October 17, 2015, 05:37
Default
  #2
Member
 
Join Date: Jun 2012
Posts: 66
Rep Power: 5
Bazinga is on a distinguished road
how do you start the solver? I just tried a tutorial and the residuals and simulation information were shown in the terminal after I just typed the solver name.
Bazinga is offline   Reply With Quote

Old   October 17, 2015, 14:18
Default
  #3
Super Moderator
 
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 9,215
Blog Entries: 35
Rep Power: 94
wyldckat is just really nicewyldckat is just really nicewyldckat is just really nicewyldckat is just really nicewyldckat is just really nice
Quick answer: Check the file "system/fvSolution", search for the block "PIMPLE" and check if this line exists:
Code:
momentumPredictor no;
If you have it defined like this, then this means that the velocity (momentum) equation isn't solved directly.
vsammartano likes this.
wyldckat is offline   Reply With Quote

Old   October 18, 2015, 05:55
Smile ...easy solution!! finally!
  #4
New Member
 
Vincenzo
Join Date: Oct 2012
Location: Palermo (IT)
Posts: 4
Rep Power: 5
vsammartano is on a distinguished road
Quote:
Originally Posted by wyldckat View Post
Quick answer: Check the file "system/fvSolution", search for the block "PIMPLE" and check if this line exists:
Code:
momentumPredictor no;
If you have it defined like this, then this means that the velocity (momentum) equation isn't solved directly.
Dear Bruno, I'm so grateful to you for helping me out! I was stucked! it was such an easy solution ... tomorrow I'll modify the fvSolution file as you told me! YEP!
thank you again!
vsammartano is offline   Reply With Quote

Old   October 18, 2015, 06:05
Smile
  #5
New Member
 
Vincenzo
Join Date: Oct 2012
Location: Palermo (IT)
Posts: 4
Rep Power: 5
vsammartano is on a distinguished road
Quote:
Originally Posted by Bazinga View Post
how do you start the solver? I just tried a tutorial and the residuals and simulation information were shown in the terminal after I just typed the solver name.
Dear Bazinga, thank you for your suggestion. Obviously I started the solver typing the name of the solver in the terminal. I think this is the only way to start a simulation in OpenFOAM.
In my case the problem was that in the fvSolution file, located in the system folder, the momentum equation was not solved directly...thus I caould not find the residuals of the velocity components.

Thank you again!
cheers!
vsammartano is offline   Reply With Quote

Old   October 19, 2015, 07:37
Default
  #6
New Member
 
Vincenzo
Join Date: Oct 2012
Location: Palermo (IT)
Posts: 4
Rep Power: 5
vsammartano is on a distinguished road
Dear Bruno, I modified the fvSolution file as you suggested....it works! Could you please suggest me some reference where I can read how does this solver work? Thank you again,
cheers!
vsammartano is offline   Reply With Quote

Old   October 24, 2015, 13:20
Default
  #7
Super Moderator
 
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 9,215
Blog Entries: 35
Rep Power: 94
wyldckat is just really nicewyldckat is just really nicewyldckat is just really nicewyldckat is just really nicewyldckat is just really nice
Quote:
Originally Posted by vsammartano View Post
Could you please suggest me some reference where I can read how does this solver work?
Quick answer: Unfortunately I'm not familiar with any reference documentation for interDyMFoam.
Nonetheless, there is some about interFoam: https://openfoamwiki.net/index.php/InterFoam
The "DyM" part means "Dynamic Mesh" and is a mechanism that is mostly common to all solvers that have this tag in their name. Google:
Code:
OpenFOAM dynamic meshing explained
wyldckat is offline   Reply With Quote

Reply

Tags
openfoam, residuals, u components

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
Calculate velocity components from shear stress Arnoldinho OpenFOAM Running, Solving & CFD 0 August 29, 2011 12:07
ATTENTION! Reliability problems in CFX 5.7 Joseph CFX 14 April 20, 2010 15:45
velocity components at blade tip Sridevi CFX 1 January 9, 2006 02:59
Variables Definition in CFX Solver 5.6 R P CFX 2 October 26, 2004 02:13
Terrible Mistake In Fluid Dynamics History Abhi Main CFD Forum 12 July 8, 2002 09:11


All times are GMT -4. The time now is 06:32.