Pushing the Frame to 0.2 Cut the Viscosity by 5.97% — The Missing Third Moment in LBM Equilibria
·6 min read
On D2Q9, Σf c³ equals ρu for any distribution you can write. The missing ρu³ breaks Galilean invariance and makes measured viscosity depend on the frame.
Nine Arrows of Maxwell–Boltzmann — Why LBM's Equilibrium Is a Polynomial
·5 min read
A second-order Hermite truncation builds D2Q9, and the same truncation chains LBM to low-Mach flows
The Paramecium Swims Through Honey — Where Viscosity Comes From and Why Fourier and Fick Wrote the Same Line
·5 min read
Molecules carry momentum across an imaginary plane — and one identity ties viscosity, heat, and diffusion together