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

Will the unphysical pressure in several cells of micro-channel influence the result?

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 8, 2015, 10:57
Default Will the unphysical pressure in several cells of micro-channel influence the result?
  #1
New Member
 
Join Date: Jul 2014
Posts: 12
Rep Power: 12
red.yxg is on a distinguished road
Dear all:

Now I am using interFoam to simulate the 2D pressure driven two-phase flow(with pressure drop about 2000Pa). In general, the pressure distribution is okay, as you can see in the first image. The showed domain is about 2mm*1mm.
But if I zoom in the area of black box, some cells near the wall have unphysical pressure and also unphysical velocity.

So I want to ask, Is this related to the mesh(because I use symmetryPlane boundary condition for the 3rd direction normal to the screen)? Checkmesh does not complain anything.
How can we improve this? Or it is just some tiny numerical error and will not affect much on the whole simulation?

Thank you in advance.
Attached Images
File Type: png pressure at glance.png (7.7 KB, 6 views)
File Type: jpg pressure at zoom in.jpg (20.6 KB, 10 views)
red.yxg is offline   Reply With Quote

Reply

Tags
interfoam, micro channel, unphysical pressure


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
[snappyHexMesh] No layers in a small gap bobburnquist OpenFOAM Meshing & Mesh Conversion 6 August 26, 2015 10:38
Doubts about turbulence in a micro channel shardiali Main CFD Forum 17 December 5, 2012 05:34
[ICEM] error analysis despaired student ANSYS Meshing & Geometry 7 June 27, 2012 12:57
killed "snappyHexMesh" parkh32 OpenFOAM Pre-Processing 2 April 8, 2012 18:12
Hydrostatic pressure in 2-phase flow modeling (long) DS & HB Main CFD Forum 0 January 8, 2000 16:00


All times are GMT -4. The time now is 11:28.