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rayan24 June 18, 2013 17:39

difference between turbulence model
 
Hi everyone,

I'am a new user of CFD softeware (fluent) so I want to know what's the difference between the model of turbulence LES, DES, and RANS and what's the advantages and the disadvantage of each one of them, which of them is linking to mech, etc.

Thanks for your help and welcom for all explications

THanks

FMDenaro June 18, 2013 19:24

Quote:

Originally Posted by rayan24 (Post 434728)
Hi everyone,

I'am a new user of CFD softeware (fluent) so I want to know what's the difference between the model of turbulence LES, DES, and RANS and what's the advantages and the disadvantage of each one of them, which of them is linking to mech, etc.

Thanks for your help and welcom for all explications

THanks

Your question is too general for being expressed in few lines.
I think that the first issue is to understand that LES, RANS, ecc, are different "formulations", not models... That means that you solve for different types of variables.
I suggest to start with a reading of a good CFD book before to get into turbulence modelling...then, the Pope's book can be useful

rayan24 June 19, 2013 05:57

Thank you for your answer !

I want to know in what context can be used LES or RANS

At the same time I research a book :)
Thanks

Quote:

Originally Posted by FMDenaro (Post 434733)
Your question is too general for being expressed in few lines.
I think that the first issue is to understand that LES, RANS, ecc, are different "formulations", not models... That means that you solve for different types of variables.
I suggest to start with a reading of a good CFD book before to get into turbulence modelling...then, the Pope's book can be useful


amodrego June 19, 2013 14:58

Hello;

If you go, if you go to the tab help in fluent > PDF's> User's Guide and go to the chapter 13, you will see whtas the best turbulence model and what are the main characteristics of each model easily. I am in the same problem than you and i am using this information.

rayan24 June 19, 2013 15:27

Thank u a lot amodrego :p

Quote:

Originally Posted by amodrego (Post 434888)
Hello;

If you go, if you go to the tab help in fluent > PDF's> User's Guide and go to the chapter 13, you will see whtas the best turbulence model and what are the main characteristics of each model easily. I am in the same problem than you and i am using this information.



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