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

Interfoam Microchannel flow parasitic velocities

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 12, 2011, 05:13
Default Interfoam Microchannel flow parasitic velocities
  #1
New Member
 
Join Date: Jun 2011
Posts: 5
Rep Power: 5
cfd_user2011 is on a distinguished road
Hello everyone,
I am trying to simulate capillary flow in a micro-channel using Interfoam. However, I am getting parasitic velocities. I guess this is also the reason why the timestep is of the order of 10e-6. Intitally the parasitic velocities appears only at the interface, but then they appear in the entire air phase. I am using Openfoam 1.7. I am using the same schemes as those in the capillary rise tutorial. Any idea how to get rid of the parasitic velocities?
cfd_user2011 is offline   Reply With Quote

Old   June 12, 2011, 06:47
Default
  #2
Senior Member
 
Pei-Ying Hsieh
Join Date: Mar 2009
Posts: 268
Rep Power: 8
phsieh2005 is on a distinguished road
Hi,

The method proposed in the thread sometimes help, but, not for every case.

parasitic currents

Pei
phsieh2005 is offline   Reply With Quote

Old   June 12, 2011, 15:43
Default parasitic velocities
  #3
New Member
 
Join Date: Jun 2011
Posts: 5
Rep Power: 5
cfd_user2011 is on a distinguished road
I have implemented the formulation proposed in the "parasitic velocity" thread. However it does help in my case. One potential problem is that the unwanted velocities initially appear only at the interface. However, after sometime they seem to appear in the entire phase2. Is this behavior expected? Can we restrict the parasitic velocities to only the interface?
cfd_user2011 is offline   Reply With Quote

Reply

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
interFoam - stratified flow - problem with shear stress at interface AnjaMiehe OpenFOAM Running, Solving & CFD 8 June 14, 2010 06:49
Mass flow and U-Mom flow in CFX Zhihua Xie CFX 0 September 3, 2007 09:49
transform navier-stokes eq. to euler-eq. pxyz Main CFD Forum 37 July 7, 2006 08:42
Question on 3D potential flow Adrin Gharakhani Main CFD Forum 13 June 21, 1999 05:18
computation about flow around a yawed cone Tylor Xie Main CFD Forum 0 June 9, 1999 07:33


All times are GMT -4. The time now is 18:50.