“Turbulence is the most important unsolved problem of classical physics.”
Field notes from a compressible multiphase CFD researcher
Top posts this week
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[Paper Review] How to Delete Under-Relaxation — Linearisation in a Coupled Pressure-Based Solver
Why fixed-coefficient vs Newton linearisation decides all-Mach convergence
[Paper Review] A Droplet Sends Almost Every Sound Wave Back — Acoustic Impedance and a Sharp-Interface Two-Phase Solver
Why a liquid-gas interface reflects 99.9% of an acoustic wave, and the fake sound speed a smeared interface invents
Where Jacobi Dies on a Boundary-Layer Mesh — the Linelet Line-Implicit Preconditioner
Why squashing cells toward the wall stalls point smoothers, and the fix
Why Laundry Dries at 5 °C — Diffusion-Limited Evaporation vs. Heat-Driven Boiling
Why non-boiling and boiling evaporation need different source terms
The Mesher That Dies Defending Your Boundary — Constrained Delaunay and Steiner Points
Why tetgen collapses on 8.5% of valid models, and how segment and facet recovery works
Where Turbulence Stops Speeding Up a Flame — Damköhler's Wrinkling Hypothesis and Bending
The physics behind the three regimes of the turbulent flame speed curve: linear rise, bending, quenching
Where Half the Force Goes in LBM — Four Forcing Schemes and 1−1/(2τ)
Comparing lattice Boltzmann body-force schemes and pinning down the half-force correction
The Mach Number Goes to Zero, the Time Step Doesn't Budge — Reproducing an IMEX TVD Scheme
A second-order IMEX scheme that escapes the acoustic CFL without oscillating
Un-smearing the Interface Every Step — Implementing Anti-Diffusion Sharpening (IST)
A post-processing technique that pins a numerically smeared interface to a constant thickness
Supersonic Flow Can't See Upstream — Characteristics and Sound Waves in the Euler Equations
Why a small disturbance splits into three characteristic speeds
How Far Must Water Flow Before It Becomes a Parabola — Entrance Length and Hagen–Poiseuille
The pipe entrance region, the Hagen–Poiseuille parabola, and the 64/Re friction factor
When Pressure Rings in a Checkerboard — SIMPLE and Rhie-Chow Coupling
Why collocated pressure checkerboards, how Rhie-Chow fixes it, and the SIMPLE loop