RNG (k-εmodifications)

October 11, 2007, 06:51

hi all,

I would like to ask about the modifications of RNG. In some papers the modification is on the c1 constant and in others on the c2 constant (in the turbulence dissipation rate).

What is the difference? When do we use each modification?

thank you

October 12, 2007, 06:11

There are different versions of RNG models with many modifications,depending on the type of the flow. Some also keep these constants constant and others use an equation for calculating them each time.

PS: Are you doing research in a greek university?

October 21, 2007, 07:24

Junye Wang, Geoffrey H., Priestman, John R., Tippetts, "Modelling the Strong Swirl Flow in a Complex Geometry Using Unstructured Meshes" Int. J. for Numerical Methods in Heat and Fluid Flow,2006, 16(8):910~926.

The paper can give you some insight how to modify model constants.

October 11, 2007, 06:51	RNG (k-εmodifications)	#1
m.petridou Guest Posts: n/a	hi all, I would like to ask about the modifications of RNG. In some papers the modification is on the c1 constant and in others on the c2 constant (in the turbulence dissipation rate). What is the difference? When do we use each modification? thank you

October 12, 2007, 06:11	Re: RNG (k-εmodifications)	#2
George Guest Posts: n/a	There are different versions of RNG models with many modifications,depending on the type of the flow. Some also keep these constants constant and others use an equation for calculating them each time. PS: Are you doing research in a greek university?

October 21, 2007, 07:24	Re: RNG (k-εmodifications)	#3
Wang Guest Posts: n/a	Junye Wang, Geoffrey H., Priestman, John R., Tippetts, "Modelling the Strong Swirl Flow in a Complex Geometry Using Unstructured Meshes" Int. J. for Numerical Methods in Heat and Fluid Flow,2006, 16(8):910~926. The paper can give you some insight how to modify model constants.

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
RNG k-epsilon model implementation	romant	OpenFOAM Running, Solving & CFD	2	June 20, 2018 08:33
why RNG k-e is better & what does RNG really mean?	Bonnie White	FLUENT	1	August 8, 2006 09:14
HELP!! Prandtl numbers in RNG k-e turbulence model	maoasis	FLUENT	0	April 24, 2006 10:51
rng les	zxaar	FLUENT	0	May 18, 2005 01:16
RNG with Schemit number	zwdi	FLUENT	0	August 2, 2004 11:54