Definition
Plain language
A simulation method that handles sudden, sharp jumps in a fluid — like the shock wave off a fast-moving object — without the calculation blowing up.
As stated in the literature
A class of numerical methods for compressible flow that resolve discontinuities (shocks) via controlled dissipation or limiters, avoiding spurious oscillations near the shock front; central to hypersonic re-entry simulations.
Also called: shock-capturing
Why it matters: It makes it possible to accurately simulate fast, violent airflows that would otherwise cause the calculation to produce garbage near the sharp jumps.
For example, when simulating the sharp shock wave off a supersonic jet, this method handles the sudden jump in air pressure without the numbers wildly oscillating and breaking down.
Heard on the show
“… limiter, the pre-graded mesh, an explicit time integrator suited to the stiffness, and a shock-capturing scheme tuned for the bow region. …”Episode 042 — An Agentic Scientific Computing System That Actually Remembers What It Learns