CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Water Evaporation and condensation modeling

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

Like Tree3Likes
  • 2 Post By Linjie
  • 1 Post By greg

LinkBack Thread Tools Search this Thread Display Modes
Old   May 22, 2007, 17:09
Default Water Evaporation and condensation modeling
Posts: n/a
Hello everyone!

I am doing a project that will require an emulation of water evaporation and condesation in a enclosed glass box structure (measures 4x20 meters) with a thin layer of water (0.3-0.6 meters deep)laying at the bottom of the container. Physicaly, the water will start to evaporate when the sun hits the water and raises the tempature, while the evaporated water vapour (gas) rises to the ceiling and subseqently condensate into liquid water when reaches dew point. The question is if the measurements of the glass box and the volumn of the thin layer of water and the air temperature outside the box is given, how can i model the evporation and condensation process and phenomenon? (either in CFX or Fluent) Since I am a total beginner, please be simple and step by step if possible, or if there is any example or tutorials exist somewhere, please let me know!!

thanks a million!

  Reply With Quote

Old   May 24, 2007, 09:23
Default Re: Water Evaporation and condensation modeling
Posts: n/a
first. If you want to use a 3D model you need to do a 3D model of your domain but if you doesn`t want to do 3D calculations 2 D model is OK. Statement above is very important if you want to model solar radiation (and use solar ray tracing model) - it is imposible in 2D. In 2D you have to assume bottom surface of tank (glass box) as an heating source with ttmperature or heat flux BC or apper wall as an heat source and use some radiation model (I wouldn`t do that becausee you want to have a condenastation at the top of tank). Than you have to create 2 phases and use appropriate UDF for this 2 phenomona. Please read tutorial about VOF model and FILM BOILING and BOIL tutorial. You can find it on and some manual aboute UDF.

good luck
Ahmed Alkaisi likes this.
  Reply With Quote

Old   May 24, 2007, 14:53
Default Re: Water Evaporation and condensation modeling
Posts: n/a
Thanks very much for the advice, I will look into it!! Cheers!

  Reply With Quote

Old   February 6, 2012, 13:08
Default Need help
Vaibhav Rai Khare
Join Date: Jul 2011
Location: Jaipur
Posts: 37
Rep Power: 14
vaibhavraikhare is on a distinguished road
Hello Linjie
i am working on same as your project was.plz guide me on it..i m using fluent 6.3. mixture model, PBM model for mass transfer of liq, DTRM for solar radiation with solar ray it correct bcoz m nt getting results.
plz help..
vaibhavraikhare is offline   Reply With Quote


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
Can Fluent perform evaporation and condensation simulation? Wei Shao FLUENT 25 December 1, 2017 04:12
water boiling, evaporation, condensation Hao FLUENT 14 April 21, 2017 13:08
Evaporation and condensation in a tube Wei Shao Main CFD Forum 4 September 16, 2009 10:19
Water Evaporation and condensation modeling Linjie CFX 6 May 24, 2007 14:55
A tutorial for condensation or evaporation Asghari FLUENT 0 September 29, 2006 22:25

All times are GMT -4. The time now is 13:47.