A solver test failed in February and a hard-coded relaxation factor of 1.5 took the blame. Measured on every grid, 1.5 was within a sweep of the best on exactly one of them, February's failure had another cause, and the …
What computational fluid dynamics actually is — the history from Euler to WENO schemes, why analytical solutions and wind tunnels both hit walls, and where the hard parts lie.
The Navier–Stokes equations from four playground ideas — mass, momentum, viscosity and pressure — through Euler, Navier and Stokes to the vector calculus that writes them down.
Numerical Computing