Writing PDE BC for mass fraction in UDF??

April 7, 2004, 03:53

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.

From

KKLAU

April 7, 2004, 04:53

Hi,

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".

Thanx

FJ

April 7, 2004, 05:54

Please define your and what you are trying to simulate a bit more. Thomas

April 7, 2004, 03:53	Writing PDE BC for mass fraction in UDF??	#1
KKLAU Guest Posts: n/a	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. From KKLAU

April 7, 2004, 04:53	Re: Writing PDE BC for mass fraction in UDF??	#2
FJ Guest Posts: n/a	Hi, 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". Thanx FJ

April 7, 2004, 05:54	Re: Writing PDE BC for mass fraction in UDF??	#3
thomas Guest Posts: n/a	Please define your and what you are trying to simulate a bit more. Thomas

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Water subcooled boiling	Attesz	CFX	7	January 5, 2013 03:32
On the damBreak4phaseFine cases	paean	OpenFOAM Running, Solving & CFD	0	November 14, 2008 21:14
CFX Solver Memory Error	mike	CFX	1	March 19, 2008 07:22
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