CFD Online Discussion Forums

Understanding The k-ω SST Model

Posted May 18, 2017 at 17:38 by Avr.Tomer

Florian Menter's k-ω SST is one of the most reliable and trusted RANS two-equation eddy-viscosity turbulence models for the simulation of attached boundary-layer flows with adverse pressure gradient, and also serves as first choice for hybrid RANS-LES DES by many.

The following taken from CFD ISRAEL blog (thoughts of a CFD blogger) is intended to give a short and thorough review of the main reasons for the k-ω SST*Model popularity.

Understanding The k-ω SST Model - CFD ISRAEL blog

Avr.Tomer

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Understanding The Spalart-Allmaras Turbulence*Model

Posted May 18, 2017 at 17:33 by Avr.Tomer

The Spalart-Allmaras model devised by P. Spalart and S. Allmaras (of the Boeing Commercial Airplane Group) is maybe the most popular RANS turbulence closure model for aerodynamic flows.

In the following newly posted*on CFD ISRAEL blog (thoughts of a CFD blogger), a brief evaluation of the model is presented.

Understanding The Spalart-Allmaras Turbulence*Model - CFD ISRAEL blog

Avr.Tomer

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Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam

Posted May 12, 2017 at 13:49 by kindle

More about the solver

there is someone asking "does this solver work with K-Epsilon? in other words can I solve a turbulent viscoelastic flow by the means of this solver?"

Quote:

Originally Posted by jovani

Hello Foamers,

My name is Jovani and I want announce that will soon be available a solver for treatment of viscoelastic fluid in OpenFOAM. I was working in the development of a viscoelasticFluidFoam solver (with the great orientation of the Dr. Hrvoje Jasak, thank you very much

...

kindle

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access field in BC condition

Posted May 11, 2017 at 10:26 by kindle
Updated June 7, 2017 at 13:13 by kindle

Two other links may be interesting

https://www.cfd-online.com/Forums/op...time-step.html

https://www.cfd-online.com/Forums/op...ct-scalar.html

Quote:

Originally Posted by alberto

How can a field defined in the solver code be accessed from within the code of a boundary condition?

As explained here http://www.cfd-online.com/OpenFOAM_D...tml?1133622442, I'm

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kindle

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Updating Boundary Conditions Each Iteration

Posted May 11, 2017 at 10:03 by kindle
Updated June 7, 2017 at 13:13 by kindle

One post downstairs took his "fixed Gradient" to do the update at every time step. But how do I access to the U field of time step before?

Quote:

Originally Posted by thomas99

Hello All,

I have a situation where I would like to calculate some boundary conditions from the internal field. The problem is that, for each time step, the boundary conditions should be iteratively updated as part of the solution. I have searched the forum and noticed that many people have recommended the groovyBC or swak4Foam

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kindle

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