[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)
Where Negative Density Leaks In — A Positivity-Preserving Flux Limiter for Blast Waves
·6 min read
A Le Blanc rarefaction can drive density negative. Per-face θ blends the high-order flux back toward Lax–Friedrichs only as far as the floor requires.
[Paper Review] Why Roe breaks at low Mach — Hope–Collins (2022) and three artificial-diffusion scalings
·6 min read
At Mach 0.01 the convective scaling leaves amplitude 0.018. Acoustic and mixed scalings still hold 0.974 and 0.971 after one acoustic period.