General CFD FAQ
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This FAQ is empty. This is just a suggestion on how to structure it. Please feel free to add questions and answers here! | This FAQ is empty. This is just a suggestion on how to structure it. Please feel free to add questions and answers here! | ||
| - | + | == Physics == | |
| + | === What is the difference between the Reynolds decomposition and LES filtering? === | ||
| + | The Reynolds decomposition separates the velocity field into an average component and a fluctuating component. '''The time average of the fluctuating component is identically zero'''. In LES, a filtering operation is performed to decompose the velocity field into a ''filtered'' velocity field and a ''filtered residual'' field. The fundamental difference is that the filtered velocity field is a '''random variable''' and the time average of the residual field is generally '''nonzero''' | ||
== Numerics == | == Numerics == | ||
=== What is the difference between FEM, FVM and FDM? === | === What is the difference between FEM, FVM and FDM? === | ||
Revision as of 08:10, 5 December 2005
This FAQ is empty. This is just a suggestion on how to structure it. Please feel free to add questions and answers here!
Contents |
Physics
What is the difference between the Reynolds decomposition and LES filtering?
The Reynolds decomposition separates the velocity field into an average component and a fluctuating component. The time average of the fluctuating component is identically zero. In LES, a filtering operation is performed to decompose the velocity field into a filtered velocity field and a filtered residual field. The fundamental difference is that the filtered velocity field is a random variable and the time average of the residual field is generally nonzero
Numerics
What is the difference between FEM, FVM and FDM?
Describe differences between the finite volume method, the finite element method and the finite difference method...
