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Forum: Main CFD Forum

February 22, 2015, 11:15

Replies: 7

Energy containing range in energy spectrum

Views: 1,419

Posted By FMDenaro

no, in pipe/channel flows you cannot estimate via...

no, in pipe/channel flows you cannot estimate via the isotropic/homogenous theory...turbulence structures associated to small scales of the motion are not isotropic.
As I wrote before, only far from...

Forum: Main CFD Forum

February 20, 2015, 03:36

Replies: 7

Energy containing range in energy spectrum

Views: 1,419

Posted By FMDenaro

well, if you use LES the task is more complex.......

well, if you use LES the task is more complex....

1) for complex flows you need a local filter widht, that means that in the region where a large inertial range exists you can have a quite large...

Forum: Main CFD Forum

February 19, 2015, 10:25

Replies: 7

Energy containing range in energy spectrum

Views: 1,419

Posted By FMDenaro

if an inertial range exists, you will see it...

if an inertial range exists, you will see it plotting the spectrum...
for example consider the case of the channel flow: at low y+ (close to the wall) practically you see no straight slope of the...

Forum: Main CFD Forum

February 19, 2015, 05:02

Replies: 7

Energy containing range in energy spectrum

Views: 1,419

Posted By FMDenaro

Sorry but your question is not clear ... the...

Sorry but your question is not clear ... the k^-5/3 law is the theoretical slope for the particular case of the intertial range for homogeneous isotropic turbulence, followed by the dissipative...

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