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DNS LES RANS Spectral Methods

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Old   November 9, 2019, 09:16
Default DNS LES RANS Spectral Methods
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Khaled Ahmad
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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
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Old   November 9, 2019, 11:19
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Paolo Lampitella
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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.
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Old   November 9, 2019, 12:02
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Filippo Maria Denaro
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Quote:
Originally Posted by kh.aa View Post
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
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Old   November 9, 2019, 14:28
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Quote:
Originally Posted by sbaffini View Post
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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