Which is the right boundary condition to use?

vtr027 · July 19, 2014, 10:45

Hello.

I'm a inexperienced user of OpenFOAM, and I'm trying to simulate a case based on ScalarTransportFoam, thus with velocity field specified.

The boundary condition of a variable is a equation for its gradient. In fact, it is, for z = 0:

dC/dz = K * (C - Co), where K and Co are problem's constants parameters.

Which is the right boundary condition to use? Also, is it possible to these constants (K and Co) to be read from the transportProperties flie?

Every help is welcome.
Thank you!

nimasam · August 2, 2014, 13:03

Dear Victor

you should modified your solver, start from here

vtr027 · August 4, 2014, 07:14

nimasam, thanks for your answer.

I have already modified the solver to add other fields. Do you know how to implement this boudary conditon?

nimasam · August 4, 2014, 12:10

use groovyBC and search for robian boundary condition

July 19, 2014, 10:45	Which is the right boundary condition to use?	#1
vtr027 New Member Victor Corcino Join Date: Jul 2014 Posts: 2 Rep Power: 0	Hello. I'm a inexperienced user of OpenFOAM, and I'm trying to simulate a case based on ScalarTransportFoam, thus with velocity field specified. The boundary condition of a variable is a equation for its gradient. In fact, it is, for z = 0: dC/dz = K * (C - Co), where K and Co are problem's constants parameters. Which is the right boundary condition to use? Also, is it possible to these constants (K and Co) to be read from the transportProperties flie? Every help is welcome. Thank you!

August 2, 2014, 13:03		#2
nimasam Senior Member Nima Samkhaniani Join Date: Sep 2009 Location: Tehran, Iran Posts: 1,266 Blog Entries: 1 Rep Power: 24	Dear Victor you should modified your solver, start from here __________________ My Personal Website (http://nimasamkhaniani.ir/) Telegram channel (https://t.me/cfd_foam)

August 4, 2014, 12:10		#4
nimasam Senior Member Nima Samkhaniani Join Date: Sep 2009 Location: Tehran, Iran Posts: 1,266 Blog Entries: 1 Rep Power: 24	use groovyBC and search for robian boundary condition __________________ My Personal Website (http://nimasamkhaniani.ir/) Telegram channel (https://t.me/cfd_foam)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
sliding mesh problem in CFX	Saima	CFX	46	September 11, 2021 07:38
Outflow boundary condition in cartesian grid SIMPLE velocity-pressure coupling	ghobold	Main CFD Forum	9	September 19, 2015 02:50
Radiation interface	hinca	CFX	15	January 26, 2014 17:11
An error has occurred in cfx5solve:	volo87	CFX	5	June 14, 2013 17:44
How exactly the "pressure outlet" bdry condition compute properties on the boundary?	yating9901	FLUENT	3	June 28, 2010 12:26

August 4, 2014, 07:14		#3
vtr027 New Member Victor Corcino Join Date: Jul 2014 Posts: 2 Rep Power: 0	nimasam, thanks for your answer. I have already modified the solver to add other fields. Do you know how to implement this boudary conditon?