The Shock Never Left the Starting Line — Where Conservative and Primitive Forms Split
·8 min read
Writing the same equation as a flux divergence or as a velocity times a gradient changes the shock speed you compute. Refining the grid eight-fold converges to the wrong answer.
Same Answer From 18% of the Cells — AMR Tagging Criteria and Coarse-Fine Refluxing
·8 min read
The Löhner sensor, buffer width, and the interface mass leak a flux register stops