[Paper Review] The Pressure Went Implicit and Δt Still Shrank 100× — the Second 1/M² Hiding in the Relative Velocity
·8 min read
In an isentropic two-phase all-Mach split, the enthalpy jump hides a second 1/M². The CFL stays tied to Mach until that term is integrated implicitly too.
[Paper Review] How to Delete Under-Relaxation — Linearisation in a Coupled Pressure-Based Solver
·10 min read
On the Sod case, M/Co = 2.25 sends the lagged iteration to P = 2.250, while Newton reaches the physical root P = 1 in five iterations.
[Paper Review] Suspect the Cell After Solving It — A Posteriori MOOD Subcell Limiter for DG
·7 min read
Solve first, doubt later — reproducing the MOOD limiter of Ioriatti, Dumbser, Loubère (2020)