It's quite amazing how Computational Fluid Dynamics (CFD) progress has been tremendous in the past half a decade. Moore's Law vision of an exponential growth in computational resources lived up to its expectation and it's by many predicted to keep doing so for the next 20 years if not more. Moore's Law applied to CFD One huge leap forward …

# Numerical Schemes in CFD- Part I – The Cell-Reynolds Problem

Part I of Numerical Schemes in CFD shall regard an important topic approaching conventional CFD and the process of discretization of the governing partial differential equations of a fluid flow by approximating the differential equations with a system of algebraic ones and linking the discrete nodal values of velocity, pressure, etc. There are three broad methods employed for …

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# Understanding the Boussinesq Hypothesis and the Eddy-Viscosity Concept

The following post shall regard a concept that stands in the basics of turbulence modeling, but even much more than that it regards true "out of the box" rare thinking. In the long history of science there are many examples for such "out of the box" thinking which led to amazing theories, some more cheered …

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# Know Your Mesh

Consider the simulation of flow field past a solid obstruction. Generating a grid to solve a discretization scheme shall proceed in one of few routes. First a surface grid covering the boundaries of the solid body may be generated. In subsequent step, If a finite-difference scheme is employed, then a curvilinear coordinate system aligned with the grid lines shall be …

# Understanding Reynolds Stress Models (RSM) for Turbulence Modeling – Part I

“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 Poincare. The above quote, at approximately the same time as Osborne Reynolds was proposing a random description of turbulent flow, was probably the …

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# ANSYS Discovery Live Explained

TENZOR - Authorized Channel Partner ANSYS - Delivering pure knowledge to our communuty. ANSYS Discovery Live amazed me do to the simplicity of the approach for real-time multiple simulation and design exploration concept. ANSYS has taken a bold step towards automation of CFD while not neglecting theoretical backed features. In the following Q&A that I …

# LET’s LES IV

“…the smallest eddies are almost numberless, and large things are rotated only by large eddies and not by small ones, and small things are turned by small eddies and large” – Leonardo di ser Piero da Vinci Following the anticipated approach for LES simulation setup, as presented thoroughly in LET's LES I, LET's LES II and …