I Plugged in Pressure Directly and a Still Interface Started to Shiver — Two Forms of Nonideal LBM Forcing
·6 min read
Pressure-form and chemical-potential forcing agree for van der Waals in the continuum, then split on the lattice where the Gibbs-Duhem defect lives.
Why a Droplet at Rest Starts to Flow — Parasitic Currents and Well-Balanced Surface Tension
·6 min read
A 3% curvature error drives the residual to 4.8e5, while exact curvature leaves it at 4.1e-10. That gap is the parasitic current.
The Star That Started Moving — Well-Balanced FVM and Angular Momentum in Polar Coordinates
·6 min read
Mis-discretize 2P/r and a quiet star will leak gas out of its center.