How to implimemt non-fixed gradient boundary condition ?

rapierrz · April 5, 2015, 04:17

Hi friends,

I want to impliment below non-fixed boundary condition :

for a scalar field C , that is volume fraction : for example

in 0/C file :

downWall
{
gradient 5000/T;
}

T is temprature that change in every time step.

please Help me.

agustinvo · April 20, 2015, 10:21

Hello

you should use GroovyBC to do that. In the expression you have to introduce, you should put the formula you propose.

neelarun · April 8, 2020, 04:23

Hello rapierrz,

Have you managed to solve your problem using GroovyBC?
I have faced a similar problem and I would like to know how you solved it?

neelarun.

April 5, 2015, 04:17	How to implimemt non-fixed gradient boundary condition ?	#1
rapierrz Senior Member Hesam Join Date: Feb 2015 Posts: 139 Rep Power: 11	Hi friends, I want to impliment below non-fixed boundary condition : for a scalar field C , that is volume fraction : for example in 0/C file : downWall { gradient 5000/T; } T is temprature that change in every time step. please Help me.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Zero gradient boundary condition	sharif88	Fluent UDF and Scheme Programming	16	July 26, 2018 10:11
Accessing multiple boundary patches from a custom boundary condition file	ripudaman	OpenFOAM Programming & Development	0	October 22, 2014 18:34
Low Mixing time Problem	Mavier	CFX	5	April 29, 2013 00:00
External Radiation Boundary Condition for Grid Interface	CFD XUE	FLUENT	0	July 9, 2010 02:53
External Radiation Boundary Condition (Two sided wall), Grid Interface	CFD XUE	FLUENT	0	July 8, 2010 06:49

April 20, 2015, 10:21		#2
agustinvo Senior Member Agustín Villa Join Date: Apr 2013 Location: Alcorcón Posts: 313 Rep Power: 15	Hello you should use GroovyBC to do that. In the expression you have to introduce, you should put the formula you propose.

April 8, 2020, 04:23		#3
neelarun New Member Neelarun Mukherjee Join Date: Jun 2019 Posts: 2 Rep Power: 0	Hello rapierrz, Have you managed to solve your problem using GroovyBC? I have faced a similar problem and I would like to know how you solved it? neelarun.