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

best liquid-vapour modelling

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 29, 2001, 09:52
Default best liquid-vapour modelling
  #1
Zane Joze
Guest
 
Posts: n/a
hi everybody

just want to know some suggestions about two-phase modelling (liquid-vapour), what methods are the simpliest and very exact?

thanks for any help

zane
  Reply With Quote

Old   March 30, 2001, 05:30
Default Re: best liquid-vapour modelling
  #2
Bubba
Guest
 
Posts: n/a
Answer is problem dependent. State your problem and then one can answer...
  Reply With Quote

Old   March 30, 2001, 12:03
Default Re: best liquid-vapour modelling
  #3
Dia Zeidan
Guest
 
Posts: n/a
Hello,

I'm working with two-phase flow (liquid-vapour). could you please explain what do you mean by simplest and very exact.

regards

Dia
  Reply With Quote

Old   April 5, 2001, 04:12
Default Re: best liquid-vapour modelling
  #4
Zane Joze
Guest
 
Posts: n/a
Well the situation is like this. I believe all the comercial program and codes are limited to some general problems in CFD. In my case special time dependent boundary conditions are used. I am used to do all the code by myself, but to this time I simulated only one phase (liquid phase). I have sola-vof and nasa-3d source codes, but to set my boundary conditions into the codes and adjust the code is far two complicated. I rather discretised equations and programming all by myself. So is there any good books or papers where equations for liquid-vapour phase are described in discretised form (all terms included). I found Fletcher's CFD book for liquid phase very easy to read, where all terms are precisesly described. I wrote From that form it is not hard to write a program to solve equations. Any suggestions? Thanks. Zane
  Reply With Quote

Old   April 10, 2001, 11:52
Default Re: best liquid-vapour modelling
  #5
Dia Zeidan
Guest
 
Posts: n/a
Why don't you solve for single pressure model.
  Reply With Quote

Old   April 12, 2001, 17:27
Default Re: best liquid-vapour modelling
  #6
Bubba
Guest
 
Posts: n/a
For multiphase modelling you can go several ways depending on the degree of complexity you want.

ie.

1) homogeneous model 2) 6 equation model 3) 1 fluid model

Interface tracking models use a one fluid formulation. Looking at this the NS equations are the same as in a one fluid, except you will want surface tension and the second part of the viscous term. The method to solve this equation is typically done using a projection method however I am seeing more and more people using Simple schemes.

---------------------------------------------------- Good books...

1)Ferziger and Peric: (Computational Methods for Fluid Dynamics)

2)Patankar: Numerical Heat Transfer and Fluid Flow.

---------------------------------------------------- Did you want mass transfer in the model as well? This is the fun part
  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
Please help with liquid fuel combustion modelling tom FLUENT 4 October 17, 2014 22:08
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
Modelling the liquid evacuation in the shoe-floor contact juanmariacg CFX 2 February 22, 2011 18:14
Modelling Vapour Pressure in CFX Bioinst CFX 5 November 11, 2010 17:03
multiphase liquid vapour Habbash FLUENT 0 June 13, 2009 20:06


All times are GMT -4. The time now is 01:11.