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

Difference between using kinetic theory and UDF for mixture mass diffusivity

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 9, 2020, 00:08
Default Difference between using kinetic theory and UDF for mixture mass diffusivity
  #1
New Member
 
Yije
Join Date: May 2020
Posts: 5
Rep Power: 2
yijecho is on a distinguished road
Hi,

I have an udf code for the mass diffusivity of a mixture, which is based on the kinetic theory of Chapman. The horizontal flow goes through a channel, which has an attached porous zone on the top. There are four species in my model.

When I used the kinetic theory option for mass diffusivity, there is a species concentration difference between the porous zone and channel because of the viscous resistance of the porous zone. However, when I used the udf code, there is no difference between the two zones.

What would be the reason for this?

Thank you,
Yije

https://drive.google.com/file/d/1har...ew?usp=sharing
https://drive.google.com/file/d/1m7e...ew?usp=sharing
yijecho is offline   Reply With Quote

Reply

Tags
kinetic theory, mass diffusivity, mixture, udf

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
UDF Macro for Mass Diffusivity using Kinetic Theory souza.emer Fluent UDF and Scheme Programming 5 May 28, 2019 14:28
Multiphase mass transfer udf deada Fluent UDF and Scheme Programming 2 March 27, 2017 08:17
udf for cohesive forces in kinetic theory T.Hari FLUENT 1 October 6, 2014 14:41
Mass source, Momentum source theory. diffo FLUENT 4 August 21, 2009 10:26
Problem with Mass source, Momentum source theory diffo Fluent UDF and Scheme Programming 0 August 20, 2009 06:10


All times are GMT -4. The time now is 10:12.