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

Boiling plus condensation in a closed domain

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 28, 2015, 23:26
Question Boiling plus condensation in a closed domain
  #1
New Member
 
Edmond Lam
Join Date: Jun 2015
Location: Geneva, CH
Posts: 13
Rep Power: 7
edmondlam is on a distinguished road
Hi, I am doing a simulation with FLUENT 14.0 for both boiling and condensation processes in a closed domain.

My system is a cylindrical tank which is heated at its bottom. Water is put inside the tank. There are fins on the outer wall of the cylinder. As the system heats up, water in the tank boils. The water vapor travels to the top of the interior of the tank, and dissipates heat by condensation to the tank wall and then through fins to the surroundings.

My problem is that in FLUENT 14.0, if I enable the RPI boiling model, there is only one mass-transfer mechanism, "boiling", from liquid to vapor available. I cannot add an "evaporation-condensation" mass-transfer mechanism from vapor to liquid in the phase interaction panel. Thus then FLEUNT only models the boiling process but not the condensation process.

Is there a way to implement both RPI boiling and condensation in one simulation without using a UDF

or is there any other better way of doing this

it is kind of frustrating

Thanks in advance!

My geometry only includes the tank + fins (no modelling of flow of surrounding air). I chose "convection" as the boundary conditions for the exterior of the cylinder, and "temperature" as the boundary condition for the part of the cylinder that is heated. It is a conjugate heat transfer problem, I have meshed both the water and the solid (tank wall + fins).
edmondlam is offline   Reply With Quote

Reply

Tags
boiling, condensation, conjugate, multiphase, rpi

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
Natural convection in a closed domain STILL NEEDING help! Yr0gErG FLUENT 4 December 2, 2019 00:04
Floating point exception: Zero divide liladhar CFX 11 December 16, 2013 04:07
CFX domain comparison Kiat110616 CFX 4 April 3, 2011 22:43
Check for property conservation in a closed domain Yr0gErG FLUENT 6 March 28, 2011 05:15
Natural convection in a closed domain help! Yr0gErG FLUENT 3 March 23, 2011 05:27


All times are GMT -4. The time now is 05:30.