CFD Online URL
[Sponsors]
Home > Forums > FLUENT

Cavitation in venturi

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 12, 2006, 06:08
Default Cavitation in venturi
  #1
pranav
Guest
 
Posts: n/a
Hi

I am working on venturi cavitation by using fluent. Does anybody know how to get the temperature at collapse phase of Cavitation?

Thanks
  Reply With Quote

Old   May 13, 2006, 13:51
Default Re: Cavitation in venturi
  #2
CFDtoy
Guest
 
Posts: n/a
Hi Pranav: In reality, the temperature increase incase of venturi cav is that not high. Thts why people decouple energy eqn, If you want to solve for temp.

Include, Energy Eqn and make vapor phase compressible. You will get what you want

CFDtoy !
  Reply With Quote

Old   May 13, 2006, 16:59
Default Re: Cavitation in venturi
  #3
pranav
Guest
 
Posts: n/a
Hi CFDtoy,

Thank you for your response.

I am interested on vapour phase temperature & pressure not for mixtures. In reality, the temperature & pressure rise is more in vapour phase while collapsing stage of cavitation bubbles.

Please share with me, If you have any other ideas.

Pranav

  Reply With Quote

Old   May 14, 2006, 12:45
Default Re: Cavitation in venturi
  #4
Donald
Guest
 
Posts: n/a
It is not possible to do this in fluent without a correct equation of state. You need gas E.O.S. more adanced than ideal gas.

D.
  Reply With Quote

Old   May 15, 2006, 02:19
Default Re: Cavitation in venturi
  #5
mateus
Guest
 
Posts: n/a
Hi!

I think that what you try to do is wery interesting but also very hard. There was a paper of cfd simulation including thermal effects at the CAV2003 conference (just write cav2003 in google - you´ll find a link to the papers there). But there they used a different approach of modelling - the barotropic cavitation model. You´ll probably also not get far with vof and bubble dynamics (reyleigh plesset equation) because you´d need a very dense mesh for that - cell size 1/10 of the bubble size...that´s approximatelly 10^-5m (or even less in the beginning and end stage of bubble evolution).

I hope I helped a bit...

If you have any questions about cavitation modeling i am heppy to help, just write me an email - i did a lot of work in this area (but none considering thermal effects.

By mateus
  Reply With Quote

Reply

Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
compressibility and cavitation!! xhliu1 NUMECA 2 June 27, 2005 18:16
compressibility and cavitation!! xhliu1 CD-adapco 11 March 16, 2005 08:19
Cavitation Simulation by CFD Liu, L. CFX 2 November 29, 2000 14:50
Cavitation Simulation by CFD Liu, L. CD-adapco 2 November 1, 2000 22:51
Cavitation Simulation by CFD Liu, L. Main CFD Forum 7 November 1, 2000 22:26


All times are GMT -4. The time now is 10:35.