liquid-gas free surface and VOF

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

 February 16, 2009, 07:22 liquid-gas free surface and VOF #1 farne Guest   Posts: n/a Sponsored Links Hi all, I want to simulate a box filled water and air motion above it in 2d. left wall of the box is hot, right wall is cold. I wolud like to investigate streamlines, isotherms and heat transfer coefficient in different air temperatures and different aspect ration. But, I have no idea, how can i model in gambit. image of model is above. http://img9.imageshack.us/my.php?ima...surfaceku9.png right, left and bootom walls of box are ok. but, for other walls, i have been try alot of BC but, nothing nothing nothing. can you say, how can I draw the problem in gambit, how can I define phases and free surface. which model is nessesery in fluent. can I use "open channel flow" model. please help me. thanks in advance

 February 18, 2009, 20:13 Re: liquid-gas free surface and VOF #2 farne Guest   Posts: n/a please help!!!

 February 19, 2009, 02:49 Re: liquid-gas free surface and VOF #3 Ameya Durve Guest   Posts: n/a Even i am simulating box filled with water and motion of the air above and conditions required for entrapment of air in water. What i do is I simply draw a rectangular face in gambit and export a 2d mesh. BC's are simply "walls " and "fluid". I define phases in fluent. interface is created by patching appropriate volume fractions of water and air. (The patching has to be done in fluent). Hot and cold walls can be deifined by changing wall BC in fluent. To be frank I don't see the problem to be that critical. May be if you can be more specific as to where you are stuck, I can try to help you in a better way. Regards Ameya

 February 19, 2009, 17:19 Re: liquid-gas free surface and VOF #4 farne Guest   Posts: n/a thanks. i draw a rectangular face and define phases in gambit. in fluent, initalize and patch are done. after iteration, solution converged. this is good. but, I have to use boussinesq approximation for water and air. I think, boussinesq aproximation can use for only a phase in vof model. what can I do for this problem?? thanks

 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 lee CFX 2 June 4, 2008 21:01 wanghong FLUENT 1 November 29, 2004 04:26 Lou jing Main CFD Forum 1 July 11, 2003 14:43 name Main CFD Forum 1 September 21, 2001 09:54 Kaushik FLUENT 1 May 8, 2000 06:47