writeEk.H
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23 
24 Application
25  writeEk
26 
27 Description
28  This function evaluates q(k) (McComb, p61) by summing all wavevectors
29  in a k-shell. Then we divide through by the volume of the box
30  - to be accurate, by the volume of the ellipsoid enclosing the
31  box (assume cells even in each direction). Finally, multiply the
32  q(k) values by k^2 to give the full power spectrum E(k). Integrating
33  this over the whole range gives the energy in turbulence.
34 
35 \*---------------------------------------------------------------------------*/
36 
37 #ifndef writeEk_H
38 #define writeEk_H
39 
40 #include "volFieldsFwd.H"
41 
42 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
43 
44 namespace Foam
45 {
46 
47 class Kmesh;
48 
49 void writeEk
50 (
51  const volVectorField& U,
52  const Kmesh& K
53 );
54 
55 
56 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
57 
58 } // End namespace Foam
59 
60 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
61 
62 #endif
63 
64 // ************************************************************************* //
K
K
Definition: pEqn.H:75
U
U
Definition: pEqn.H:72
Foam
Namespace for OpenFOAM.
Definition: atmBoundaryLayer.H:214
Foam::volVectorField
VolField< vector > volVectorField
Definition: volFieldsFwd.H:65
Foam::writeEk
void writeEk(const volVectorField &U, const Kmesh &K)
Definition: writeEk.C:41