49.9% of the Dynamic Coefficients Came Out Negative — the Germano Identity and the Averaging Operator
·7 min read
Measuring the Smagorinsky coefficient with the Germano identity returns a negative value at half the grid points. Where the average is taken decides stability.
Where Turbulence Stops Speeding Up a Flame — Damköhler's Wrinkling Hypothesis and Bending
·9 min read
The physics behind the three regimes of the turbulent flame speed curve: linear rise, bending, quenching
Turbulence Runs Three Rulers at Once — The Kolmogorov Cascade and the -5/3 Law
·5 min read
How big eddies break down to viscous prey, and the spectrum drawn over that road
When the Stream Breaks — Reynolds' Critical Number and the Layered Turbulent Boundary
·7 min read
Where laminar flow falls apart, and how the turbulent boundary stacks itself in three sublayers
[OpenFOAM Tutorial] Backward Facing Step Flow Analysis — Capturing Recirculation Zones with simpleFoam
·2 min read
A step-by-step guide to analyzing incompressible flow over a Backward Facing Step using OpenFOAM simpleFoam.