CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

phase transforming with heat transfer

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 31, 2003, 21:46
Default phase transforming with heat transfer
  #1
Danual
Guest
 
Posts: n/a
i want to simulate the process of liquid water transforming into vaporate water flowing in a hot duct. But i don't know which model i should used. Because all the multiphase models don't considerate the evaporation progress. what should i do?

Any help will be appreciated! Thank you!
  Reply With Quote

Old   June 1, 2003, 08:36
Default Re: phase transforming with heat transfer
  #2
mateus
Guest
 
Posts: n/a
Hi!

I think the best possibility is VoF multiphase model with UDF for mass transfer (you have an example for UDF defining mass transfer due to incerased temperature).

regards

MATEUS
  Reply With Quote

Old   June 1, 2003, 12:43
Default Re: phase transforming with heat transfer
  #3
Danual
Guest
 
Posts: n/a
Thank you for your help. But the vof multiphase model just model the two phases which don't penetrate into eath other. The most difficult thing i face is how to considerate the heat transfer between the two phases and the transforming of liquid into gas. i appreciate any help. Thanks again!
  Reply With Quote

Old   June 2, 2003, 07:12
Default Re: phase transforming with heat transfer
  #4
mateus
Guest
 
Posts: n/a
Hi!

If the two phases do not penetrate each other means that there is a defined boundary between them (in your case boiling - liquid and wapour). The case where they are penetrating each other is for example mixture of water and alcohol (no boundary between liquids can be defined).

As I told you you can find an example of heat transfer and mass transfer in fluent UDF documentaion. Hm. I forgot to ask you - which fluent wersion are you using - with fluent 6.1 it's possible to do this, but I'm not shure for previous versions.

Anyway - check UDF documentation (FLUENT 6.1 - chapter - 4.4.2).

REGARDS, AND GOOD LUCK

MATEUS

  Reply With Quote

Old   June 2, 2003, 12:52
Default Re: phase transforming with heat transfer
  #5
mateus
Guest
 
Posts: n/a
Hi!

I have sent you the documentation - i hope the adress was correct - I've had some problems with it...

have fun

MATEUS
  Reply With Quote

Old   June 3, 2003, 12:38
Default Re: phase transforming with heat transfer
  #6
Danual
Guest
 
Posts: n/a
It's a great help! Thank you very much.
  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
MRF and Heat transfer calculation Susan YU FLUENT 0 June 2, 2010 08:46
Natural convection - Inlet boundary condition max91 CFX 1 July 29, 2008 20:28
CFX Heat Transfer RJamison CFX 0 July 24, 2008 12:11
VOF model for the two phase heat transfer Dibakar Rakshit FLUENT 2 April 7, 2008 03:43
help needed about phase change Yanhu Guo Main CFD Forum 4 January 24, 2001 00:16


All times are GMT -4. The time now is 11:04.