CFD Online Discussion Forums

Enosh, a structured grid generator (I)

Posted February 7, 2014 at 17:33 by lakeat (Daniel Wei's CFD Blog: (http://lakeat.co.nf/))
Updated February 13, 2014 at 12:49 by lakeat

Trust me, I've read more than 20 structured mesh generator codes already in the last year. Interestingly, none of them satisfy me. So I decided to make it my own. I've been working on this small mesh generator for quite a while. It worked before for a single block mesh smoothing. But starting from last month, as I was thinking about how to make it "multi-block", I decided to rewrite the whole code. Because it is quite different from C++ point of view to design classes for a single block...

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lakeat

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Free Android App for Aerodynamics calculations

Posted February 2, 2014 at 09:46 by nilyash81

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

The app is handy tool for Aerodynamic Engineers and Academicians. It contains Isentropic Relations, Normal Shock Relations, Oblique-Shock (Theta-Beta-Mach) Relations, Prandtl-Meyer Expansion wave Relations, Pitot Tube- Velocity computations, Y Plus or Y+ calculations.

1. Isentropic Relations - If any one of the variable from M, Po/P, To/T, Rho/Rh or A/A* is known and used as input, the remaining...

nilyash81

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Calculation of Wall Shear Stress

Posted February 1, 2014 at 22:53 by Nucleophobe
Updated February 2, 2014 at 02:10 by Nucleophobe

Tags wall shear stress

Quote:

Originally Posted by Dave442

Hi Glen,

Sorry, I wasn't asking you to check my calculations or anything. I was just wondering, as I cant find the definition in the theory manual, if the wall shear stress vector is definitely derived in CFX from the dot product of the viscous stress tensor and the unit normal vector as follows:

Tau = T . n

T = viscous stress tensor
n = surface normal vector
Tau = wall shear stress vector

As far as my axes are concerned, I generated

...

Nucleophobe

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Reg. LES in OpenFOAM

Posted January 17, 2014 at 09:51 by pierellozzo

Tags k_boundary

Nice post on k at the boundary

Quote:

Originally Posted by alberto

Some picky comment, but I hope of some help.

Depending on the information you have from experiments, you can, at least roughly, estimate the residual kinetic energy at the inlet, and use that value. If you have PIV measurements of the inlet, you can filter that velocity filter that velocity field with the same filter size you use in the simulation, and obtain the value of the residual k at the BC.
Giving as boundary condition the

...

pierellozzo

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Computational Core of HyperFLOW2D now open source, meet OpenHyperFLOW2D !

Posted December 24, 2013 at 13:51 by SergeAS
Updated June 8, 2016 at 18:10 by SergeAS

Tags cfd, open source, parallel

Computational Core of my oldest 2D NS-solver now open source (LGPLv3),
meet OpenHyperFLOW2D
(include serial and parallel MPI,OpenMP and CUDA versions)