[canopus]

Hello
I have mean velocity and turbulent kinetic energy profiles
from experimental data. I want to use this as an input to
my FORTRAN LES code.

Can you please suggest(hints/literature) what are the simple methods to generate a fluctuating field at inlet using the data above?

I have tried random fluctuations based on random number generator
but they do not seem satisfactory.

Best regards
SM

[farahnak.mehdi]

hello every one.
i want to model a isotropic turbulent flow with openfoam.
my case is a turbulence generator in a wind tunnel.
i just know the velocity of air at entrance of the tunnel
i want to model it with simplefoam.
what boundary condition must i choose for P and U and ....?
please help me

[AndreaF]

Hi Canopus,

Did you find any solution to your problem? I'm facing the same issue for a DNS simulation.

Thanks in advance,
Andrea

[sbaffini]

It's been a while since the last time I went trough LES/DNS literature, but the following are good starting points:

http://www.sciencedirect.com/science...45793009001601

http://www.annualreviews.org/doi/abs...rnalCode=fluid

http://www.sciencedirect.com/science...21999112006389

Edit: the last link points to the method that, in my opinion, is the most simple, and yet powerful, to use. Even if i didn't implement it myself, the unique issue I can see for the implementation is to have a coherent (i.e., shared) pool of random numbers among the different processors fixing the inlet.

[AndreaF]

Thanks a lot Paolo!

I will have a look to the articles and try to find a solution suitable for a Fortran90 implementation.

Regards,
Andrea