|December 19, 2009, 08:36||
Constant pressure drop condition
Join Date: Aug 2009
Posts: 60Rep Power: 8
Hello, I will be working on a model where I will make a simple tapered pipe, run it on a SuperFlow flow bench to obtain flow and pressure data. Then do a CFD simulation of the problem in Fluent.
I have used the flow bench a lot in the past so I know what I am trying to achieve with it and how it works. So I have tried to set-up a hypothetical case now in Fluent to see how it will work.
The problem I have is the flow bench will maintain a constant pressure drop accross an orifice, say we have an atmospheric pressure of 101350pa and the pressure on the other side is 99850pa. So I set these up as boundary conditions in Fluent as "pressure inlet" and "pressure outlet" with a K Epsilon viscous model. The problem I have is the pressure at the outlet does not stay constant once the solution have converged. It has risen from 99850 to slightly over 100000, even though I set the condition to be constant.
Does anyone have any ideas or have done similar cases previously?
It is not for any Uni work but for me, to look at correlation of models.
Thanks a lot.
|Thread||Thread Starter||Forum||Replies||Last Post|
|mass flow in is not equal to mass flow out||saii||CFX||2||September 18, 2009 08:07|
|How to plot pressure drop with Periodic BC?||bigfans||FLUENT||6||August 7, 2009 07:48|
|pressure drop calculation multi-inlet-outlet syst.||timmyy||FLUENT||1||April 24, 2007 06:03|
|pressure drop in porous media||Dongying Qian||FLUENT||4||January 2, 2004 15:38|
|Pressure outlet condition can't fix the pressure?||mei||FLUENT||7||February 6, 2002 22:53|