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

help me in a boundary conditions

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 13, 2012, 13:00
Exclamation help me in a boundary conditions
  #1
New Member
 
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 14
dima13 is on a distinguished road
I want a condition for the velocity (U), so maximum
that are provided "Slipe" and reliable
how to write in fille, pressure, NUT, epssilon and K
dima13 is offline   Reply With Quote

Old   June 14, 2012, 17:34
Exclamation
  #2
New Member
 
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 14
dima13 is on a distinguished road
could you help me
dima13 is offline   Reply With Quote

Old   June 14, 2012, 23:57
Default
  #3
Senior Member
 
Adhiraj
Join Date: Sep 2010
Location: Karnataka, India
Posts: 187
Rep Power: 15
adhiraj is on a distinguished road
Can you describe the issue more clearly?
People here are willing to help; they need to understand what you need help with.
adhiraj is offline   Reply With Quote

Old   June 15, 2012, 19:27
Default
  #4
New Member
 
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 14
dima13 is on a distinguished road
that's my problem, the velocity is zero in circles, because it is declared type wall
my question is are there as a condition to limit, so that the velocity is maximum at the center of the pipe?
Attached Images
File Type: jpg U.0011.jpg (14.8 KB, 16 views)
dima13 is offline   Reply With Quote

Old   June 16, 2012, 19:12
Default
  #5
New Member
 
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 14
dima13 is on a distinguished road
could you help me
dima13 is offline   Reply With Quote

Old   June 16, 2012, 22:06
Default
  #6
Retired Super Moderator
 
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,975
Blog Entries: 45
Rep Power: 128
wyldckat is a name known to allwyldckat is a name known to allwyldckat is a name known to allwyldckat is a name known to allwyldckat is a name known to allwyldckat is a name known to all
Greetings dima13,

It's a bit difficult to understand what is your question really is...
Are you looking for a way to impose a parabolic inlet velocity?

Best regards,
Bruno
__________________
wyldckat is offline   Reply With Quote

Old   June 17, 2012, 02:20
Default
  #7
New Member
 
omar_beg
Join Date: Mar 2012
Posts: 17
Rep Power: 14
dima13 is on a distinguished road
nn, I want a condition to limit, on blockMeshDict, which gives a velocity maximum on the wall,
in the wall boundary conditions is of type Wall
I am looking for a type so that the velocity is maximum on the wall
dima13 is offline   Reply With Quote

Old   June 17, 2012, 07:41
Default
  #8
Retired Super Moderator
 
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,975
Blog Entries: 45
Rep Power: 128
wyldckat is a name known to allwyldckat is a name known to allwyldckat is a name known to allwyldckat is a name known to allwyldckat is a name known to allwyldckat is a name known to all
Hi dima13,

Have you tried fixedValue? That way you can prescribe the maximum value on the wall: http://www.openfoam.org/docs/user/boundaries.php

Best regards,
Bruno
__________________
wyldckat is offline   Reply With Quote

Reply


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
Impinging Jet Boundary Conditions Anindya Main CFD Forum 25 February 27, 2016 12:58
symmetry boundary conditions in cfx lost.identity CFX 41 May 22, 2013 07:21
OpenFOAM Variable Velocity Boundary Conditions NickolasPl OpenFOAM Programming & Development 2 May 19, 2011 05:37
[Netgen] boundary conditions and mesh exporting vaina74 OpenFOAM Meshing & Mesh Conversion 2 May 27, 2010 09:38
[Commercial meshers] Trimmed cell and embedded refinement mesh conversion issues michele OpenFOAM Meshing & Mesh Conversion 2 July 15, 2005 04:15


All times are GMT -4. The time now is 11:10.