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

Using Fluent VOF and Lee model to simulate mass transfer of two phase

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

LinkBack Thread Tools Search this Thread Display Modes
Old   May 1, 2019, 10:55
Default Using Fluent VOF and Lee model to simulate mass transfer of two phase
New Member
Join Date: Jul 2018
Posts: 7
Rep Power: 7
Albert Lee is on a distinguished road
Hi everyone!
I have used the VOF method to simulate the mass transfer from a liquid phase to vapor phase in a storage tank. The gravity level is zero.
[problem description] I have use udf files to load my mass transfer mechanism on Fluent, the mass transfer mechanism is Lee model as Fluent help files described. In my udf, I limited the mass transfer position to the interface. The capturing of interface with VOF method is good. The boundary condition is shown in the first figure. And the temperature distribution is show in the second figure.

physical model.pngtemperature distribution.png

Now I have some questions looking forward to your answers :
After I simulated for 8s, the temperature distribution is obviously unphysical. the temperature of the vapor phase (ullage) should be lower than that of liquid phase, and the temperature should distributed with
thermal stratification from the heat source to vapor phase, but the result is just the contrary! I really don't know how to solve it!
The properities of fluids was set as the Fluent database given.
By the way, the mass transfer occured normally according my define in the udf flie. The vapor phase was set as ideal gas.

Is there some methods to solve the problem I confronted above? Thank you!
Albert Lee is offline   Reply With Quote

Old   May 2, 2019, 08:01
Senior Member
Join Date: Jul 2016
Posts: 138
Rep Power: 9
vidyadhar is on a distinguished road
Hello Albert Lee, I am also facing this problem. I am not sure if it may be rectified by using DEFINE_MASS_TRANSFER instead of DEFINE_SOURCE ?

vidyadhar is offline   Reply With Quote


fluent, interface, mass transfer, udf, vof

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
effect of mass transfer on pressure equation in OpenFoam rapierrz OpenFOAM Running, Solving & CFD 0 October 10, 2015 12:54

All times are GMT -4. The time now is 02:22.