|
[Sponsors] |
Smagorinsky term in SGS kinetic energy equation |
![]() |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
![]() |
![]() |
#1 |
New Member
Ivan
Join Date: Aug 2012
Posts: 22
Rep Power: 14 ![]() |
Dear all,
I want to model the equation for the SGS turbulent kinetic energy (TKE) in LES context. Without entering the details, I have two terms I am dealing with. The first is the triple correlation (a) 1/2*( ![]() ![]() which I model as c*rho*delta*sqrt(k)*dk/dt, where k is the SGS TKE and c is a certain constant, and i put together with the diffusion term. All ok until here. There is, however, the term (b) ![]() where ![]() (c) ![]() My code follows a finite volume approach. I do not know then how to calculate this term (b). For example, is there a easy way to insert this term into the diffusion term? How this term is usually modelled (ex. implicitely or explicitely)?. Is there some paper to look at? Hope someone can help! |
|
![]() |
![]() |
![]() |
![]() |
#2 |
Senior Member
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,925
Rep Power: 73 ![]() ![]() ![]() |
Quote:
Maybe I have not well understood your question, but for what I see the term b) is in divergence form, thus I don't see particular problems to insert it in a finite volume constest... ![]() is the additional flux ... |
|
![]() |
![]() |
![]() |
![]() |
#3 | |
New Member
Ivan
Join Date: Aug 2012
Posts: 22
Rep Power: 14 ![]() |
Quote:
The procedure to calculate the flux requires first the calculation of ![]() Of course, if not, the solution will be to compute the flux! =) |
||
![]() |
![]() |
![]() |
![]() |
#4 |
Senior Member
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,925
Rep Power: 73 ![]() ![]() ![]() |
Quote:
I never worked personally on LES modelling supplied by the kinetic energy equation, I suggest to have a look at the book of Sagaut, you can find the TKE equation and have an idea of the modelling approximations |
|
![]() |
![]() |
![]() |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
error message | cuteapathy | CFX | 14 | March 20, 2012 07:45 |
viscous term in energy equation | seb62 | OpenFOAM Running, Solving & CFD | 0 | March 19, 2009 04:41 |
what's the macro of SGS turbulent kinetic energy? | lcw | FLUENT | 1 | June 13, 2006 04:08 |
bouyancy term in epsilon equation | Michael | Main CFD Forum | 1 | June 25, 1999 11:20 |
Why FVM for high-Re flows? | Zhong Lei | Main CFD Forum | 23 | May 14, 1999 14:22 |