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

multiphase DyM solvers - velocities

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 7, 2014, 10:20
Default multiphase DyM solvers - velocities
  #1
Member
 
Victor-S. Eberhart
Join Date: Oct 2011
Posts: 32
Rep Power: 5
vigges is on a distinguished road
Hello all,

I'm dealing with interDyMFoam and compressibleInterDyMFoam for quite some time now. At a recent meeting, the question came up which velocity is calculated - relative or absolute.

In this specific case, a closed test tube filled with 50% liquid and 50% air will be "shaken" along the longitudinal axis according to a prescribed oscillation (non-sinusoidal).

Looking at lines 110 and 111 in compressibleInterDyMFoam.C, I find
Code:
                // Make the fluxes relative to the mesh motion
                fvc::makeRelative(phi, U);
So, I think the velocity vectors are being "transformed" into the moving reference system, here, the moving domain. Or at least I believe that in the end my output values represent the relative velocity U_rel = U_abs - U_domain, but I'm not entirely sure. In this case, U_domain represents the velocity with which my mesh is moving.

Maybe, someone is able to shed light on that matter. Thank you
vigges is offline   Reply With Quote

Reply

Tags
multiphase flow, relative velocity

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
Sample velocities for a multiphase problem emirust OpenFOAM Post-Processing 5 July 20, 2015 21:15
yPlusRAS & yPlusLES doesn't work for multiphase Solvers (e.g. twoLiquidMixingFoam) cfdonline2mohsen OpenFOAM Post-Processing 3 July 20, 2014 13:30
multiphase solvers alpha sweep not implemented romant OpenFOAM 9 January 5, 2012 11:28
Multiphase solvers Theory titio OpenFOAM Running, Solving & CFD 1 November 20, 2009 18:23
multiphase UDF, variables for phase velocities Kerem FLUENT 4 March 27, 2006 08:20


All times are GMT -4. The time now is 21:24.