CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM Running, Solving & CFD

pimpleFoam Vs pimpleDyMFoam -- Different Results

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

LinkBack Thread Tools Display Modes
Old   November 16, 2016, 12:14
Exclamation pimpleFoam Vs pimpleDyMFoam -- Different Results
New Member
Join Date: May 2013
Location: Munich Germany
Posts: 29
Rep Power: 6
kingmaker is on a distinguished road
I am trying to simulate a cylinder in flow problem (2D).

Case 1 :

Flow around a cylinder 
Turbulence Model : LES (all default values)
Wall Function : nutUSpaldingWallFunction (for nuSgs)
solver : pimpleFoam
Case 2 :

All physics same as Case 1. 
No Displacement on the mesh
solver : pimpleDyMFoam
OpenFOAM version 2.2.1
I know the Turbulence models LES should not have any effect in 2D case, I setup a generic 3D case.

Now when I plot the forces(Lift and Drag) on the cylinder they are completely different.
Here I am posting the plots. I am totally confused. I am doing this because I want to use the pimpleDyMFoam for FSI simulations (because of mesh motion possibility). So I want to make sure that pimpleDyMFoam, with mesh motion set to 0 on relevant patches, gives same result as pimpleFoam . But apparently this is not the case.

Any hints to as what is happening is really helpful.
Attached Images
File Type: png Fx_plot.png (43.5 KB, 26 views)
File Type: png Fy_plot.png (40.1 KB, 28 views)
kingmaker is offline   Reply With Quote

Old   April 22, 2017, 02:05
New Member
Join Date: Jun 2013
Posts: 9
Rep Power: 6
imamwfgf is on a distinguished road
Hi Aditya,

Did you ever solve this problem? In my case, my pimpleFoam results converges smoothly while pimpleDyMFoam with no mesh motion diverged after 10-20 iterations.
imamwfgf is offline   Reply With Quote


cfd - post, pimpledymfoam dynamic, pimplefoam

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
lid driven cavity varying results yasmil OpenFOAM Running, Solving & CFD 2 October 6, 2016 21:42
CFD results not close to experimental results cider STAR-CCM+ 0 July 8, 2013 07:53
Creating a tool to interpolate results Luis Batista OpenFOAM Running, Solving & CFD 2 April 11, 2013 08:15
OpenFOAM - Validation of Results Ahmed OpenFOAM Running, Solving & CFD 9 June 22, 2011 18:59
CFX cylinder or sphere benchmark results Mel CFX 1 August 8, 2005 18:47

All times are GMT -4. The time now is 17:53.