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

saturated tank modelling using VOF

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 5, 2020, 07:38
Lightbulb saturated tank modelling using VOF
  #1
Member
 
ram_call's Avatar
 
ram
Join Date: Apr 2013
Posts: 37
Rep Power: 13
ram_call is on a distinguished road
Hello,
I am simulating an initially saturated tank with refrigerant that the same flow enters 5K subcooled. I used pseudo-transient VOF model with dispersed interface, evaporation and condensation mass transfer. mass flow inlet and pressure outlet BC.

I have the following doubts/questions :

1) at first the outlet mass flow rate is higher than inlet, then it get close to inlet flow gradually. Also without any flow rate at initial runs, the outlet mass flow rate has values! why is that?

2) After some iterations, the temperature in the liquid domain lowered, but liquid volume fraction decreases. It seems liquid is evaporating and no gas is condensing. Why is that?

two mass transfer mechanism of the same type are active from liquid to gas and from gas to liquid (evaporation/condensation)
ram_call is offline   Reply With Quote

Old   September 6, 2020, 10:54
Default
  #2
Member
 
ram_call's Avatar
 
ram
Join Date: Apr 2013
Posts: 37
Rep Power: 13
ram_call is on a distinguished road
The photos of liquid volume fraction and temperature are attached.
Attached Images
File Type: jpg VF.jpg (112.7 KB, 4 views)
File Type: jpg T.jpg (150.1 KB, 3 views)
ram_call is offline   Reply With Quote

Reply

Tags
saturated, two-phase flow, vof simulation

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
Modelling falling solid sphere using interFoam VOF model eelcovv OpenFOAM Running, Solving & CFD 6 August 7, 2021 21:52
VOF modelling, water drainage from an elevated tank ashraf88 FLUENT 5 November 29, 2013 08:05
how to apply VOF in a tank??? HAYATE CFX 9 December 15, 2007 22:01
sliding mesh for stirred tank modelling Gopal Kasat FLUENT 0 June 24, 2005 05:38
Modelling flow around a ship's hull using vof Manoj Kumar FLUENT 0 February 26, 2005 16:22


All times are GMT -4. The time now is 00:42.