|May 15, 2010, 03:01||
trouble in applied BC
Join Date: May 2010
Posts: 1Rep Power: 0
I’m going to model viscous flow passes through porous duct in CFX or Fluent software. This process is time dependent and there are two immiscible fluids (Air and resin).
At first, there is air in duct. A vacuum pump in deferent produces vacuum at the duct’s outlet and exhausts air and air is replaced by resin.
What types of boundary condition are suitable for this simulation in CFX or Fluent software? Can I apply pressure inlet as intake boundary condition, while pressure outlet is applied as outlet vent?
I tried to model a viscous flow by “pressure inlet” and “pressure outlet” in CFX but there was a trouble and CFX announced “floating point exception” and solve was terminated with error so soon. CFX manual offers that applicants should use “velocity inlet”! But I don’t know anything about velocity of fluids in domain.
What can I do?
I would be very grateful for any advice.
|May 15, 2010, 07:05||
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 13,296Rep Power: 103
You should be able to use a pressure inlet for this application.
The floating point exception just means the solver has diverged big-time. You just need to improve numerical stability - try smaller time steps, double precision solver, improving mesh quality etc. Also be careful with the porous region, that can cause convergence difficulties.
|Thread||Thread Starter||Forum||Replies||Last Post|
|trouble with `pressureDirectedInletVelocity'||yohey||OpenFOAM Running, Solving & CFD||2||October 4, 2013 11:15|
|[GAMBIT] Trouble meshing complex VOF geometry||RPJones||ANSYS Meshing & Geometry||2||February 14, 2011 19:54|
|How to check the value of applied loads at keypoints ?||pathfinder_jj||ANSYS||1||January 5, 2010 11:26|
|Applied Math vs Mechanical Engineering vs??||David||Main CFD Forum||26||March 21, 2006 12:51|
|CFD applied to Cryogenics||Shailendra Tiwari||Main CFD Forum||0||September 29, 2003 04:54|