# resistance b.c.'s in FEM

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

 September 23, 1999, 17:47 resistance b.c.'s in FEM #1 dolf van der heide Guest   Posts: n/a Consider the following: geometry is a bifurcation (Y) inlet: velocity prescribed. 2 outlets: where different resistances are applied R1 smaller than R2. The resistance b.c. is a simple P = Q * R condition where R is a representation for what happens downstream. I can't get this converged. I get inflow on the outflow. The resistance b.c. is just the simplest of lumped parameter models that I can think of, and it has a nice electrical analogy. Can anyone shed some light as to why this is not converging, or give me an idea what to apply instead?

 September 23, 1999, 18:10 Re: resistance b.c.'s in FEM #2 John C. Chien Guest   Posts: n/a (1). Install two positive displacement pumps at each outlet. Then you can control the exact flow rate. And the outlet is always the outlet. This is a test setup. (2). With the flow rate specified, you can specify the outlet velocity as boundary conditions. The solution should converge. It is like having a faucet at the end of each outlet, you control the flow rate there.

 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 ravitejakatragadda FLUENT 1 September 24, 2014 07:06 nkliuyueming Main CFD Forum 6 August 3, 2012 05:26 tobino FLUENT 0 June 27, 2011 20:31 Häwimeddel FLUENT 2 April 20, 2009 10:08 kenn Main CFD Forum 2 July 18, 2004 18:28

All times are GMT -4. The time now is 19:21.