CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Writing PDE BC for mass fraction in UDF??

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

LinkBack Thread Tools Display Modes
Old   April 7, 2004, 03:53
Default Writing PDE BC for mass fraction in UDF??
Posts: n/a
Sponsored Links
To All Fluent Experts all over the world,

Thanks you for your assistance in solving my earlier problem. I am now facing another problem.

How to write the PDE BC with UDF for mass fraction ? There is a built macro for Div (v)/Div (y). But i cant find any macro for Div(m)/Div(y) where m = mass fraction.

By the way, i am going to include it on the wall boundary.

Is there any other way to do it?

Thank you.



  Reply With Quote
Sponsored Links

Old   April 7, 2004, 04:53
Default Re: Writing PDE BC for mass fraction in UDF??
Posts: n/a

There are not any macros for it. So we have to define the differential equation in UDF.

Mass fraction of a species is defined as "C_YI(c, t, 0)". This "0" is the species number in the panel of "Define-Materials-mixture templete-names-edit-selected species".


  Reply With Quote

Old   April 7, 2004, 05:54
Default Re: Writing PDE BC for mass fraction in UDF??
Posts: n/a
Please define your and what you are trying to simulate a bit more. Thomas
  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
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
On the damBreak4phaseFine cases paean OpenFOAM Running, Solving & CFD 0 November 14, 2008 22:14
CFX Solver Memory Error mike CFX 1 March 19, 2008 08:22
I need UDF help. S.Whitney FLUENT 0 October 15, 2007 11:29
UDF PDE BC involved mass fraction ?? KKLAU FLUENT 0 April 6, 2004 03:39

Sponsored Links

All times are GMT -4. The time now is 20:38.