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 msuaeronautics May 18, 2013 15:20

Laplacian Schemes

Can someone tell me what term this line refers to in the fvSchemes dictionary?

Code:

`laplacian((1|A(U)),p)`
In other words, what is A(U) and what does this entire term look like/mean on paper? I understand the vertical bar | is a bitwise operator.

 msuaeronautics May 18, 2013 18:02

I suppose I may have *sort of* solved my own question. Can anyone confirm that this has to do with pressure-velocity coupling- where one would solve Poisson equations for the pressure correction? I consider myself a beginner when it comes to the depths of what's inside the code.

 ngj May 19, 2013 12:03

Hallo,

Yes, it is the Laplacian used for the solution to the pressure Poisson equation. The

Code:

`(1|A(U))`
term is the diffusivity of pressure, and it is the inverse of the diagonal elements in the discretised momentum equation, i.e. the diagonal of the left hand side of the matrix system.

Kind regards

Niels

 msuaeronautics May 19, 2013 21:59

Understood. Thank you.

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