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

High Pressure Residuals

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 28, 2014, 05:41
Default High Pressure Residuals
  #1
Senior Member
 
ArathoN
Join Date: Jul 2011
Posts: 137
Rep Power: 8
ArathoN is on a distinguished road
I'm simulating a fully developed flow using pimplefoam (I've read that now includes the channelfoam solver) and cyclic BCs on inlet/outlet; but i'm facing a strange problem. I have a pressure's residual too high (about 1) and it doeasn't decrease.

Here what i've done:
-consider a finer mesh
-change fvsolution and schemes
-change Courant number (lowered to 0.5) and time step
-change initial values

The problem hasn't been solved and I don't know why. I've made the same setting long time ago and it worked unfortunately i lost that case files.
Attached Files
File Type: txt fvSchemes.txt (1.9 KB, 5 views)
File Type: txt fvSolution.txt (4.0 KB, 5 views)
File Type: txt controlDict.txt (1.2 KB, 4 views)
File Type: txt blockMeshDict.txt (2.1 KB, 2 views)
File Type: txt epsilon.txt (1.5 KB, 2 views)
ArathoN is offline   Reply With Quote

Old   April 28, 2014, 05:45
Default
  #2
Senior Member
 
ArathoN
Join Date: Jul 2011
Posts: 137
Rep Power: 8
ArathoN is on a distinguished road
Here teh remaining files. Btw I've used the kEpsilon method with a coarse mesh.
Attached Files
File Type: txt k.txt (1.5 KB, 2 views)
File Type: txt nut.txt (1.4 KB, 2 views)
File Type: txt nuTilda.txt (1.2 KB, 2 views)
File Type: txt p.txt (1.2 KB, 6 views)
File Type: txt U.txt (1.3 KB, 3 views)
ArathoN is offline   Reply With Quote

Old   May 4, 2014, 09:23
Default
  #3
Senior Member
 
ArathoN
Join Date: Jul 2011
Posts: 137
Rep Power: 8
ArathoN is on a distinguished road
No one can help me? I tried almost verything but i still got strange results and The pressure's residual is still too high. Please someone give me a hint.
ArathoN 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
static vs. total pressure auf dem feld FLUENT 17 February 26, 2016 14:04
sonicFoam - pressure driven pipe: flow continuity violation and waveTransmissive BC Endel OpenFOAM Running, Solving & CFD 3 September 11, 2014 16:29
Neumann pressure BC and velocity field Antech Main CFD Forum 0 April 25, 2006 02:15
Hydrostatic pressure in 2-phase flow modeling (CFX4.2) HB &DS CFX 0 January 9, 2000 14:19
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 15:24.