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Ph.D. Thesis on LES

Posted May 1, 2014 at 12:24 by sbaffini (NuTBox)
Updated December 21, 2016 at 10:08 by sbaffini

I recently defended my thesis on Large Eddy Simulation, which is now available at:

http://hdl.handle.net/10589/89603

I won't spend too much words on promoting it, you can read the abstract for this. I just want to say it possibly provides a fresh view on the matter of implicit/explicit filtering, commutation errors and other evergreen topics in LES. As i put a specific effort on this, i also hope that it might work as a not too heavy introduction on LES in general. Finally,...
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Old

Enhanced Wall Treatment

Posted April 11, 2014 at 16:53 by diamondx

Useful near wall treatments informations:
Quote:
Originally Posted by Far View Post
This is completely wrong

If this is true then they would have used the simple else-if command which was used in the previous version of SA and K-Omega model. Still you can observe in the theory guide of Fluent (I am talking about SA model) they are using the integration to wall approach for the Y+< 2 and wall function approach for the Y+>30 and strongly recommend to make the meshes either with Y+< 2 or Y+> 30 so that they
...
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Old

y+ calculator for equilibrium flows

Posted April 10, 2014 at 03:58 by sbaffini (NuTBox)
Updated December 21, 2016 at 10:08 by sbaffini

y+ calculation is, possibly, the most pervasive topic among CFD practitioners and, certainly, anybody doing CFD for more than a month already has his own tool to compute it.

Still, all the y+ calculators i am aware of rely on a very specific flow condition, namely, a flat plate boundary layer. This is probably the most common practical case but not the only option. For example, the fully developed flow in a pipe is cretainly different and possibly requires a different input for the...
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Old

Free Android App for Compressible Nozzle

Posted April 4, 2014 at 09:17 by nilyash81

https://play.google.com/store/apps/d...ozzleflowfinal

1. Compressible flow in Convergent Divergent Nozzle2. Get mode of operation under specified operating conditions- Whether nozzle is Subsonic Nozzle, Normal Shock exist in Nozzle, location of Shock, Under-expanded or Over-expanded Nozzle. Compute Thrust, Exit Velocity, Exit Temperature and Mass Flow rate.
3. Optimization of Nozzle - Optimize Nozzle keeping fixed Area ration or Pressure ratio. Find...
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Old

Rotating diverging flow, validation #2

Posted March 20, 2014 at 07:38 by skeptik (CFD notes)

Following previous post about SRFSimpleFoam, i conclude that it's not perfect solver for simulations

Also i have had many problems with stability and convergence. Not in this simple case but in case of rotating blade.

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