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kh.aa November 9, 2019 08:16
DNS LES RANS Spectral Methods
 
Hi guys,



DNS LES RANS Spectral Methods


I am a little bit confused about these terms and in particular "Spectral Methods" term. Is DNS/LES considered a "Spectral Method"?




Thanks

sbaffini November 9, 2019 10:19
DNS, LES and RANS refer to three among other possible ways to manage the the turbulence aspect in a CFD simulation.

Spectral methods are a numerical method to solve PDEs. As it typically is of very high order, it is well suited for LES and DNS. But can be applied to anything (within the limitations of the method).

Going into more detail would be pointless, as each of the 4 terms refers to an entire world of knowledge.

FMDenaro November 9, 2019 11:02
Quote:
Originally Posted by kh.aa (Post 749321)
Hi guys,



DNS LES RANS Spectral Methods


I am a little bit confused about these terms and in particular "Spectral Methods" term. Is DNS/LES considered a "Spectral Method"?




Thanks





Paolo wrote the answer for you. I suggest to have a look to the textbook of Peric & Ferziger

kh.aa November 9, 2019 13:28
Quote:
Originally Posted by sbaffini (Post 749329)
DNS, LES and RANS refer to three among other possible ways to manage the the turbulence aspect in a CFD simulation.

Spectral methods are a numerical method to solve PDEs. As it typically is of very high order, it is well suited for LES and DNS. But can be applied to anything (within the limitations of the method).

Going into more detail would be pointless, as each of the 4 terms refers to an entire world of knowledge.



Thanks. This is exactly what I needed and no need for more details. I got it.


Thank you


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