CFD Online Logo CFD Online URL
Home > Forums > FLUENT

One transport equation, two user-defined scalar, can it be solved?

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

LinkBack Thread Tools Display Modes
Old   April 1, 2014, 22:18
Default One transport equation, two user-defined scalar, can it be solved?
Senior Member
Dongyue Li
Join Date: Jun 2012
Location: Torino, Italy
Posts: 700
Rep Power: 8
sharonyue is on a distinguished road
Hi guys

Im working on OPOSPM of PBM. This PBM solving method is very simple. As the article said:

Therefore, for the solution of PBM in CFD, only one additional transport equation for the total number concentration is needed. This equation is introduced into Fluent as a user-defined scalar. The simple source term is written as a user-defined function and added to the transport equation.
I uploaded this equation(see the attached). Right now I have one transport equation, but I have two unknown quantities: N_d, d_30 or m_0.

In the article it said:
m_0 is included as a user-defined scalar in FLUENT.
So I think it have two unknown quantities and one transport equation. I think it is unsolvable.

More details see this article, am I misunderstand it?

Any comments are welcomed.
Attached Images
File Type: jpg QQ??20140402101516.jpg (21.8 KB, 13 views)
File Type: jpg QQ??20140402101645.jpg (66.9 KB, 10 views)
File Type: jpg QQ??20140402101710.jpg (77.2 KB, 10 views)
sharonyue is offline   Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
how to make a scalar transport equation to be conserved? immortality OpenFOAM Programming & Development 3 May 5, 2013 08:11
Source Term on Scalar Transport Equation - crashing simulation OpenFOAM 19 February 8, 2011 08:38
User defined scalar transport problem (UDS) jpcfd FLUENT 0 June 8, 2010 04:50
solving passive scalar by user function in AVLFIRE huyp Main CFD Forum 0 September 4, 2008 10:21
Scalar transport equation dimension problem litonx OpenFOAM Running, Solving & CFD 3 March 2, 2007 07:49

All times are GMT -4. The time now is 04:35.