CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

boundary conditions for 2D flow around a circle

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

LinkBack Thread Tools Search this Thread Display Modes
Old   April 21, 2010, 02:26
Default boundary conditions for 2D flow around a circle
New Member
Join Date: Dec 2009
Posts: 17
Rep Power: 16
abcdef123 is on a distinguished road
Can anyone tell me (or point me to a reference) about the boundary conditions for 2D flow around a circle. I think I use a velocity inlet on the left, outlet on the right, and free stream on the top and bottom? My problem I think is how to specify the free stream boundary conditions for velocity and pressure (using the SIMPLER method).

For the circle I use wall boundary conditions, zero gradient pressure and wall functions for velocity.
For the inlet I am setting the velocity and allowing the pressure to be solved.
For the outlet I am setting the pressure to zero and apply a zero gradient to the velocity. Is this correct?

My reason for this is in trying to solve stability issues, where my code becomes unstable after a Re number of about 500. Any help is appreciated, thank you in advance.
abcdef123 is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Free-Surface Ship Flow - Boundary Conditions James Date CFX 1 February 19, 2013 05:42
Proper Pressure Boundary Conditions for Buoyant Flow mchurchf OpenFOAM 0 March 25, 2010 12:16
Heat Transfer boundary conditions for engine coolant flow simulation rajuks Main CFD Forum 0 February 15, 2010 09:04
Internal flow simulation boundary conditions Kishore FLUENT 1 July 10, 2007 11:42
Please help with flow around car modelling! Tudor Miron CFX 17 March 19, 2004 19:23

All times are GMT -4. The time now is 06:24.