home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!charon.amdahl.com!amdahl!rtech!sgiblab!spool.mu.edu!agate!usenet.ins.cwru.edu!magnus.acs.ohio-state.edu!bgsuvax!uoft02.utoledo.edu!lzhao
- From: lzhao@uoft02.utoledo.edu
- Newsgroups: sci.math.num-analysis
- Subject: Solving Navier-Stokes Eqn using Penalty Function Method
- Message-ID: <1993Jan27.203547.1323@uoft02.utoledo.edu>
- Date: 27 Jan 93 20:35:47 EST
- Organization: University of Toledo, Computer Services
- Lines: 25
-
- Hi,
- I am solving Navier-Stokes Eqn. using FEM (Penalty-function method) right
- now. I have read lots of papers, but nobody mentioned how they handeled
- the force vector. The force vector is
-
- F1=line or suface integration of(tx)
- F2=line or suface integration of(ty)
- where
- tx= 2.0*mu*(du/dx)*nx+mu*((du/dy)+(dv/dx))*ny-p*nx
- ty= mu*((du/dy)+(dv/dx))*nx+2.0*mu*(du/dx)*nx-p*nx
- and
- p=-(penalty number)*(du/dx+dv/dy)
-
- I am now using iteration method to handel this, ie first I assume a velocity
- profile, secondly calculate the force vector and then sove for the velocity.
- After this , I use the vel. got for the next iteration. But it seems that
- the result does not converge.
-
- Is there anyone can give me some help?
-
- Regards.
-
- lixin
-
- email: lzhao@uoft02.utoledo.edu
-