My name is Tomer (Tom) Avraham. I have been around fluid dynamics, CFD, and Physics in general for the past 20 years. Spent time at workplaces that I can nothing but own great gratitude for (Israeli Aerospace Industry, Elbit, head of engineering in Ansys channel partner, a consultant to STAR-CCM+ channel partner), then enabled myself …

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

In part I of this blog, we have discussed the evolvement of the Conservation of Linear Momentum Equation from Newton's Second Law of Motion using the Reynolds Transport Theorem. During the process we covered what is the need for Reynolds Transport Theorem, The Forcing & Stress Tensor Concept in Fluid: Fluid Kinematics Perspective, derived Cauchy …

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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 …

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

# 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 …

# “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: TOMERAVRAHM45@gmail.com The All Inclusive Turbulence GuideSelf paced videos for most high-end commercial softwares (Fluent advanced topics, …

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# 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

# 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...

# Milton Van Dyke: “An Album of Fluid Motion”

Milton Van Dyke's "An Album of Fluid Motion" is a rich historical contribution of flow visualisation. A note about CFD stems from a photo that appears on page 23 for streaklines marked by dye released from upstream in a water tunnel for a NACA 64A015 airfoil at zero incidence, Re=7000 (laminar and steady flow). Van Dyke …

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# Turbulence Modeling – The SlideShare Alert Series

The SlideShare Alert Aeries is decomposed from a information excerpts which I have found to be most effective in the qualitative appreciation of specific frequently in-use turbulence modeling routes.

# Mandelbrot Sets, Fractals, Dynamical Systems, Mathematics, Physics, Arts by Rendering, Cryptography, Astrophotography and Spirituality – A Connecting Post

Introduction All fractals can be generated using an Iterated Function System (IFS). An IFS consists of a function f which is executed in a feedback loop, also known to computer students as a recursive function. That means, the output of the function is given as input when the function calls itself. The first time the …

# Mandelbrot Set, Dynamical Systems, Mathematics, Physics, Arts by Rendering, Cryptography and Spirituality – Preface

Just before finishing enjoyable to write, lovely all encompassing post, some interest to ignite curiosity... Mandelbrot Set, Dynamical Systems, Mathematics, Physics, Arts by Rendering, Cryptography and Spirituality https://youtu.be/0jGaio87u3A A groundbreaking record in the numbet of itterations in a Mandelbrot Set https://youtu.be/FFftmWSzgmk Mandelbrot Set Explained https://youtu.be/apP1Q7v6M7Y The Buddhabrot Technique Explaned (by Melinda Green) The Dynamicsl Approach …

# Routes to Chaos: The Non-Linear Dynamical System Approach and Lorenz Equations – Part II

If we knew exactly the laws of nature and the situation of the universe at the initial moment, we could predict exactly the situation of the same universe at a succeeding moment - Henri Poincaré In "Routes to Chaos: The Non-Linear Dynamical System Approach – Part I" we gave a short introduction of the subject, …

# Routes to Chaos: The Non-Linear Dynamical System Approach – Part I

Give me the velocity and position of every molecule, and I will predict your future... Pierre-Simon Laplace - Mécanique Céleste Introduction This next post might be a little less approachable to some, especially those mostly attracted to the physical phenomenon standpoint, yet absolutely rejecting and keeping themself as safe as they can from mathematical valuable …

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