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

The energy conservation in a case of phase change

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 25, 2002, 04:34
Default The energy conservation in a case of phase change
  #1
robin
Guest
 
Posts: n/a
Hi,friends:

I am simulating a two-phase flow case that there is a phase-change procedure.I know the energy transfer from the bulk to the interface by setting PHINT(H1 or H2) and CINT(H1 or H2).But I don't know how to keep the energy conservation in PHOENICS when phase change happen.Thank you for your help in advance

  Reply With Quote

Old   March 30, 2002, 03:05
Default Re: The energy conservation in a case of phase cha
  #2
George Bergantz
Guest
 
Posts: n/a
This is going to be complicated and so you had better be working in terms of enthalpy instead of temperature, although that means that you will need to convert to temperature for the diffusion terms. Incidently you will also need soem additional physics to account for the changing mass and hence momentum between the phases

There are a number of papers through the years in Numerical Heat Transfer and other journals on how to set this up- although it is not PHOENICS specific. Look for papers by Beckermann (at Univ. Iowa) and his students- Ni, Wang, and others for starters. For example this *may* help but may not:

Ni & Beckermann, 1991, A volume-averaged two-phase model for transport phenomena during solidification, Metall. Trans. B, 22B, p. 349-361.

We had this general model coded in PHOENICS a few years back but convergence is tricky with so much non-linear feedback. It turned out to be a VERY compute intensive problem. I am not in a position to revisit that issue- but Ni's paper may be of some use.
  Reply With Quote

Old   April 6, 2002, 01:09
Default Re: The energy conservation in a case of phase cha
  #3
robin
Guest
 
Posts: n/a
thank you!
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mass conservation law violation in stationary case vitmalin CFX 3 September 3, 2007 14:32
how to prove energy conservation in Fluent Tony FLUENT 0 May 15, 2006 13:42
energy conservation in vertical pipe Atit Koonsrisuk CFX 1 March 30, 2005 12:41
ENERGY CONSERVATION SCHEMES! Science Seeker Main CFD Forum 1 May 24, 2001 13:13
Energy Conservation Schemes! Science Seeker Main CFD Forum 0 May 21, 2001 04:31


All times are GMT -4. The time now is 08:57.