isotropic homogeneous turbulent flow field
 

Hello!

For a project I need a downloadable CFD code that simulates a isotropic homogeneous turbulent flow field. Also I would be happy with just data form DNS or other simulations, because I need the velocity field to model a combustion. Does anyone of you know where I could get something like that?

Thanks!

http://www.amazon.co.uk/Fluid-Flow-P...6726231&sr=8-1

The accompanying CD has a spectral code on it, however the book is really expensive and I found it to be not too good.

The generation of valid HIT data can be a real pain in the neck, so seems like a big project you are working on!

cheers and good luck, I'll be happy to help any further!

Openfoam has some tutorial with it.

BUT, given that DNS requires tons of cpu time to get some results, maybe could be more cost-effective to search the literature for the results.

Thanks a lot!
@cfdnewbie: Is this a 3D HIT on the CD in that book?

yes, from a given E(k) spectrum using Rogallo's procedure (if that means anything to you....)
need more help?

cheers!

Yes I came across rogallos code during my literature research. Could I get a suitable velocity field out of it and in what form is the velocity field supplied? You're a great help, thank you!

Well, you will get an incompressible (i.e. div free) u,v,w field from that, but I guess you would have to compute the pressure from that via a poisson equation.... I'm not sure if an incompressible field is what you are looking for, I know there are some methods to get a compressible field from an incompressible one (one by G. Blaisdell).

The code is available as source code (F77, I think), so you can just modify it in any way for your output requirements.

Okay, I decided to try to work with that code. But before I buy the book, can you tell me:

Can I generate a 100^3, 200^3 and maybe 400^3 grid velocity field with multiple time steps? And how long would the code run for a time step?