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

Problem with boundary condition in airfoil case

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 23, 2014, 10:59
Default Problem with boundary condition in airfoil case
  #1
New Member
 
Jefferson Vieira
Join Date: Jul 2014
Location: Brazil/Scotland
Posts: 12
Rep Power: 4
Jefferson_dhv is on a distinguished road
Hi all,

I'm trying to do some simulations with airfoils in transonic conditions but I'm having an issue with some boundary conditions. When the bow shock reaches the top and bottom parts of my C mesh some instabilities appear and after some more iterations the solver crashes.
Initially the top and bottom BC's were set as the inlet, fixedValue for both velocity and pressure. Afterwards I tried to change to other BC's but I still had no luck. I've tried freestream, slip, zeroGradient and outletInlet BC's for velocity, maintaining fixedValue for pressure, except for freestream.

So I ask if any of you have an idea on how I could set these BC's to fix it.

Thanks in advance,
Jefferson Vieira
Jefferson_dhv is offline   Reply With Quote

Old   August 25, 2014, 15:13
Default
  #2
New Member
 
Jefferson Vieira
Join Date: Jul 2014
Location: Brazil/Scotland
Posts: 12
Rep Power: 4
Jefferson_dhv is on a distinguished road
I've changed the top and bottom BC's to waveTransmissive and now it's working fine.
Jefferson_dhv is offline   Reply With Quote

Reply

Tags
airfoil, boundary condition, transonic

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
UDS problem with wall boundary condition Alex F. FLUENT 15 September 21, 2015 09:28
rhoPimpleFoam Boundary Condition Problem dancfd OpenFOAM Pre-Processing 12 May 18, 2012 21:47
Transient outlet boundary condition problem jwillie2000 CFX 1 December 7, 2009 18:07
Velocity boundary condition problem related dmoroian OpenFOAM Running, Solving & CFD 3 October 16, 2006 08:46
a problem with Boundary condition M Rad Main CFD Forum 12 November 27, 1998 13:49


All times are GMT -4. The time now is 19:43.