# vorticity boundary condition

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

 May 14, 2010, 11:32 vorticity boundary condition #1 New Member   Mike Hu Join Date: May 2010 Posts: 1 Rep Power: 0 I'm solving a 2D forced convection problem by using finite difference method. It involves solving the vorticity-stream function equations. I met some problem when I'm trying to solve the vorticity equation, which can be stated as follows: How to deal with the vorticity boundary condition? after some searching in google, I realized that vorticity boundary condition is actually changing as time goes forward! In other word, vorticity boundary condition has to upgraded at each time step. But since the vorticity boundary condition is not constant, what values should we adopt? Say we're calculating the n+1 step, should we use the vorticity boundary condition at n+1 step or at n step? One other thing, because vorticity boundary condition is actually calculated from stream function distribution, what choice we make about vorticity boundary condition involves the distribution of stream function, at least at the boundary and at the layer that is closest to the boundary(suppose we use Thom method to calculate vorticity boundary condition). In this sense, it seems that we have to use the previous time step stream function values, because solving the vorticity-stream function equation series requires vorticity to be first solved, then the stream function. Does that mean we use the n time step stream function to get the vorticity boundary condition for n+1 time step vorticity calculation? Thank you for reading my post, any suggestion or advice will be greatly appreciated

 Tags boundary conditions, vorticity

 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 Thomas P. Abraham Main CFD Forum 20 July 7, 2013 05:05 murali CFX 5 August 3, 2012 08:56 jwillie2000 CFX 1 December 7, 2009 18:07 Pankaj CFX 9 November 23, 2009 05:05 Anjum Naveed FLUENT 7 August 14, 2006 12:25

All times are GMT -4. The time now is 00:34.