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

primary/secondary phase in VoF condensation model

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 23, 2019, 22:55
Default primary/secondary phase in VoF condensation model
  #1
Member
 
Soumitra Vadnerkar
Join Date: Aug 2018
Posts: 70
Rep Power: 5
soumitra2102 is on a distinguished road
I am using VoF model with Evaporation-Condensation Lee's model to simulate a simple condensation of water vapor to liquid water in a tube having constant wall temperature far below saturation temperature of the fluid.


When I put vapor, which is inlet to the tube, as primary phase, it's temperature never drops below saturation temperature. The temperature drop across tube length follows a nice curve till saturation temperature and then follows a straight line for the saturation temperature.


When I put liquid as primary phase, I see a perfect temperature drop that does go below saturation temperature, but I see very very negligible liquid volume fraction (~10^-5).


The solving scheme is transient, implicit coupled volume fraction scheme.


Can you suggest me how can I avoid stalling of temperature drop at saturation temperature and thus have a considerable liquid volume fraction?
soumitra2102 is offline   Reply With Quote

Old   December 16, 2019, 10:17
Default Same problem
  #2
New Member
 
Prabhuram
Join Date: Nov 2018
Posts: 1
Rep Power: 0
Prabhuram is on a distinguished road
I am thinking of using air as primary phase and both the others as secondary phases. So that, there is no transisition in the primary phase and it just acts as a carrier for the other phases
Prabhuram is offline   Reply With Quote

Old   December 16, 2019, 10:41
Default
  #3
Member
 
Soumitra Vadnerkar
Join Date: Aug 2018
Posts: 70
Rep Power: 5
soumitra2102 is on a distinguished road
Do you mean a three phase flow?
Let me know if it works.
I may also give a try.

Thanks
soumitra2102 is offline   Reply With Quote

Reply

Tags
condensation, evaporation condensation, primary-secondary fluid, vof model

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
Volume fraction of dispersed phase to determine DPM, VOF, Mixture model Mohsin FLUENT 5 March 5, 2018 07:47
VOF plus Solidification/melting model kql FLUENT 3 April 29, 2014 16:50
Mixture model + VOF? blacksoil2012 Fluent Multiphase 2 February 8, 2014 23:59
plz rply urgent regrding vof model for my system garima chaudhary FLUENT 1 July 20, 2007 08:37
urgent query regarding vof model plz rply Garima Chaudhary FLUENT 0 July 13, 2007 02:20


All times are GMT -4. The time now is 05:59.