# cylinder streamfunction

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

 December 30, 2000, 09:20 cylinder streamfunction #1 Steven Guest   Posts: n/a Hi all.. I'm doing this channel flow with square cylinder in the center of channel, and the streamfunction of the bottom wall is zero, the top is 11. So logically speaking, my centered cylinder should have a stream function of 5.5, with fluctuating values at unsteady situation also about 5.5. But no matter how I try with my programme (I'm using finite difference method), I always get a value of some value higher,like 5.7 to 5.8, for my cylinder. Can anyone advise me on what might actually be wrong? I'm using the line integral of the Navier Stokes eqn for cylinder streamfunction determination. Thanks!

 December 30, 2000, 13:04 Re: cylinder streamfunction #2 John C. Chien Guest   Posts: n/a (1). When you do line integration, you will have errors from the velocity components and the integration algorithm used. (2). So, you will have to refine you mesh to get more accurate velocity distributions. (3). The other way to do is to solve the stream function equation for the 2-D problem, using the existing velocity field or vorticity field.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post goodegg Main CFD Forum 12 January 22, 2013 12:47 ozzythewise Main CFD Forum 8 June 13, 2012 06:24 blaise OpenFOAM Meshing & Mesh Conversion 0 May 10, 2010 03:56 Tim Daly FLUENT 1 November 10, 2008 00:02 Mirek Kabacinski FLUENT 0 July 23, 2003 18:40

All times are GMT -4. The time now is 01:11.