# Unsteady Flow Modeling in Flow3D

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

 July 31, 2009, 01:11 Unsteady Flow Modeling in Flow3D #1 New Member   Flow Join Date: Jul 2009 Posts: 3 Rep Power: 7 Folks, Can we do Unsteady Flow Modeling in Flow3D? If yes, how ? Any idea or comment? Thanks FM

 July 31, 2009, 02:48 #2 Senior Member   Join Date: Mar 2009 Posts: 129 Rep Power: 8 I believe you are referring to transient fluid flow modeling right? flow-3d is design to solve transient flow + VOF. btw, is your problem is free surface flow or confined flow?

 July 31, 2009, 03:21 #3 New Member   Flow Join Date: Jul 2009 Posts: 3 Rep Power: 7 Well, i am trying to model unsteady flow in a pressure tunnel. How can i enter the unsteady flow data as input to the model?

 August 2, 2009, 16:21 Free surface in open channel flow #4 New Member   Mohamed Ghoma Join Date: May 2009 Posts: 1 Rep Power: 0 Hello I want to model 2D open channel flow using wall jet in the inlet and I want to see the depression close to the jet so i am convulsed about the boundary condition so i start with velocity inlet using VOF and outflow in the top and the outlet but I do not get good result than I use pressure inlet using open channel with free surface and velocity inlet about (1m/s) and pressure outlet top and the outlet and I still I am not able to see good free surface and depression close to the jet as what I have got from the experimental data so please if anyone know how to solve this problem please send me email (mghoma@yahoo.com) .Thanks for all your help. Regards Ghoma

August 7, 2009, 00:14
Unstaedy flow modeling
#5
New Member

Flow
Join Date: Jul 2009
Posts: 3
Rep Power: 7
Quote:
 Originally Posted by ck5285 I believe you are referring to transient fluid flow modeling right? flow-3d is design to solve transient flow + VOF. btw, is your problem is free surface flow or confined flow?

Can you plz explain how one can do the tansient flow modeling in flow3d? Which model in Flow3d should be used?

Flow

 August 9, 2009, 21:39 #6 Senior Member   Join Date: Mar 2009 Posts: 129 Rep Power: 8 Hi by default all simulation in Flow-3D is transient/unsteady flow as Flow-3D doesn't really have a steady state solver. so if you are model confined flow without free surface then you just need to turn on -> No sharp interface -> One Fluid if you are dealing with free surface then turn on free surface under interface tracking. for BC, you can have pressure inlet, velocity inlet as function of time to simulate unsteady input. hope this help

August 13, 2009, 22:34
#7
Senior Member

michael barkhudarov
Join Date: Mar 2009
Posts: 331
Rep Power: 9
Quote:
 Originally Posted by flow3d_399 Well, i am trying to model unsteady flow in a pressure tunnel. How can i enter the unsteady flow data as input to the model?
Is it confined or has a free surface? What makes it transient?

 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 Tom Smith FLUENT 2 April 27, 2007 09:04 Yoon Main CFD Forum 0 November 26, 2006 13:00 Dominique FLUENT 5 April 16, 2004 17:58 Hans Main CFD Forum 14 October 8, 2001 03:03 DS & HB Main CFD Forum 0 January 8, 2000 16:00

All times are GMT -4. The time now is 00:42.