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From Kolmogorov to Wilcox to BSL to SST – The k-ω Family of Turbulence Models… Then we’re going to slide on ANSYS paradigm – GEKO.

"Every mathematician believes that he is ahead of the others. The reason none state this belief in public is because they are intelligent people" - Andrey Kolmogorov Abstract Three versions of the k-omega two-equation turbulence model will be presented. The first is the original David d. Wilcox model. In contrast to what we learned about …

Continue reading From Kolmogorov to Wilcox to BSL to SST – The k-ω Family of Turbulence Models… Then we’re going to slide on ANSYS paradigm – GEKO.

Featured The Complete "All About CFD..." Turbulence Guide

“All About CFD” – Tom’s Blog: The All Inclusive Turbulence Guide – Call to join 🤍🤍🤍

“All About CFD” – Tom’s Blog: The All Inclusive Turbulence Guide Following payment a password shall be granted, and the protected post content shall be fully exposed. Password and Learning Spot are available upon confirming payment at EMAIL: AVR.TOMER@GMAIL.COM The All Inclusive Turbulence GuideSelf paced videos for most high-end commercial softwares (Fluent advanced topics, STAR-CCM+, …

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Featured Private Mentoring - Zoom Sessions (Special Price until 19/7/2020)

Private Mentoring – Zoom Sessions – Going Official

Private and dedicated mentoring which includes an hour of private Zoom lesson, tailored to the students interest and level, rare (my...) resources and tutorials for self learning during the session, a final project of the students choice conducted in collaboration with Tom Avraham

Featured The CFD Bare Minimum - An Initial Roadmap For To Begin Practicing CFD

The CFD Bare Minimum – An Initial Roadmap To Begin Practicing CFD

Here's a set of CFD online resources regarding basic CFD related concepts which are unnecessarily linked to a specific commercial code but goes all the way to basics with respect to CFD (numerical schemes, modified equation, CFL, Von Neumann analysis, numerical diffusion, pressure-velocity coupling, types of meshing, turbulence modelling, etc'...), along with application-specific resources, and some "hands on" practical resources. I highly recommend to follow all types of routes, if one wants to achieve both the breadth and the depth CFD has to offer...

The Enigma of Turbulence – Part I

  which description would you choose describe turbulence best: Big whirls have little whirls that feed on their velocity, and little whirls have lesser whirls and so on to viscosity... Lewis Fry Richardson Turbulence is a phenomenon which sets in in a viscous fluid for values of viscosity, hence its purest, limiting form may be interpreted as asymptotic, …

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From Reynolds Transport Theorem to Navier-Cauchy to Navier-Stokes Voyage: Part I

There are certain fundamental principles of conservation that govern the implementation of CFD. These principles are Conservation of mass, momentum & energy. We will see how we can represent these principles evolve in a mathematical form that expresses the dynamics of fluid flow by preserving mass, momentum and energy conservation. The Need of Reynolds Transport …

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SIMPLE Algorithm: Way to solve incompressible NV-Stokes Equation

Introduction Transport equations for each velocity component – momentum equations – can be derived from the general transport equation by replacing the variable φ with u, v and w respectively. The above equations govern a two-dimensional laminar steady flow. The Main Problem! The velocity field obtained from the momentum equation must also satisfy the continuity …

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Eddy Viscosity Concept & Turbulent Kinetic Energy Equation

Turbulence flow exhibits randomness but it is possible to approach them via statistical methods. It fluctuates in time and space. It is possible to do spatial and time averaging. In RANS approach, we time average the turbulent quantities to extract the mean flow properties from the fluctuating ones. Now, we have to find some way …

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Navier-Stokes Equation in Moving Reference Frame (MRF)

Reference: ANSYS Officials Most of the cfd applications consist of stationary objects around/inside which fluid will be flowing. So meshes are stationary. If the flow is incompressible, Incompressible Steady Navier-Stokes equations are solved. Very common applications are – Flow around Aerofoil, Flow inside Pipe. In both cases aerofoil and pipe are stationary hence meshes are …

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