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

How to simulate a case with two substances of which both can be condensed?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 4, 2013, 04:28
Default How to simulate a case with two substances of which both can be condensed?
  #1
New Member
 
Lee
Join Date: Oct 2012
Posts: 26
Rep Power: 6
kiwishall is on a distinguished road
As the title said, I would like to simulate a case with two substances. But I should take the condensation into consideration. I've read the multiphase flow in the tutorials. But it consistent of only one material with HBM model. So for two materials, how should I do? In one word, how to simulate the condensation of mixtures?
kiwishall is offline   Reply With Quote

Old   November 4, 2013, 05:33
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 13,808
Rep Power: 107
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
This cannot be modelled simply and no model exists in CFX to do it to my knowledge. Condensation of a single species is complex enough, let alone two species. For instance, how does the nucleation of one species affect the other? Does it amplify or retard nulceation of the second species? The answer to that very basic question is going to have a complex answer.

I suspect you are going to have to make some major simplifications to make this simulation possible - maybe assuming one substance does not affect the other, or maybe that they can be treated as a single mixture (ie the condense together).

What are you modelling anyway?
ghorrocks is offline   Reply With Quote

Old   November 4, 2013, 05:53
Default
  #3
New Member
 
Lee
Join Date: Oct 2012
Posts: 26
Rep Power: 6
kiwishall is on a distinguished road
I‘ve tried to regard the mixture as a pure substance so that they can be condensated together. But there is some difficulty in writing the material of liquid in CFX(user defined). For gas I can described it with rgp file but I don't how to deal with the liquid of the mixture.
kiwishall is offline   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
MRFSimpleFoam wind turbine case continuity error ysh1227 OpenFOAM Running, Solving & CFD 1 August 16, 2016 09:25
wallHeatFlux utility for an incompressible case Mr.Jingles OpenFOAM Post-Processing 59 May 3, 2016 14:12
MRFSimpleFoam wind turbine case diverges ysh1227 OpenFOAM Running, Solving & CFD 2 May 7, 2015 10:13
OpenFoam/FLUENT difference in cilinder case RuiVO OpenFOAM Running, Solving & CFD 2 December 12, 2011 15:26
Instable natural convection case Peter88 OpenFOAM 5 August 18, 2011 01:23


All times are GMT -4. The time now is 16:20.