Regime
Set by the source's compactness and Mach number — linear acoustics
Every figure drawn under this hypothesis — 42 of them — with the essay each one belongs to and the generator that drew it.
42 figure placements state this regime. The strip along the foot of every figure names two things — the model that produced it and the regime it holds in — and this listing is read back out of the finished drawing rather than from what produced it.
- The boom that turns back before the ground — any Mach number above one, 0 to 20 km — no wind · nonlinear-wave
- The sound now is the source then — a source in a straight line, subsonic — acoustic · what-a-gas-carries-forward
- The sound now is the source then — steady straight-line motion, uniform atmosphere — acoustic · what-a-gas-carries-forward
- The sound that only leaves — linear acoustics, uniform medium at rest — any Reynolds number · noise-scaling
- Nothing but the shape of the gap — a thin film — the clearance here is 1.0e-3 of the bore · bearing-film
- Nothing but the shape of the gap — a thin film — the clearance here is 1.0e-3 of the bore · bearing-film
- The sound is what does not cancel — linear acoustics, kd = 0.01 — a compact source, and the observer at rest · noise-scaling · hero
- The sound is what does not cancel — linear acoustics, kd = 0.01 — a compact source, and the observer at rest · noise-scaling
- The sound is what does not cancel — linear acoustics, kd from 0.02 to 0.2 — compact sources, and the observer a wavelength out · noise-scaling
- The viscosity nobody uses — linear acoustics, kd from 0.02 to 0.2 — compact sources, and the observer a wavelength out · noise-scaling
- The sound is what does not cancel — linear acoustics, kd = 0.1 — a compact source, and the observer at rest · noise-scaling
- The sound is what does not cancel — kd = 0.3 — compact sources at rest · noise-scaling
- The sound now is the source then — kd = 0.3 — compact sources at rest · noise-scaling
- The sound that only leaves — kd = 0.3 — compact sources at rest · noise-scaling
- The viscosity nobody uses — linear acoustics, kd = 0.3 — a compact source, and the observer at rest · noise-scaling
- The sound is what does not cancel — compact sources, kd ≤ 0.32 — the acoustic analogy's small-Mach limit · noise-scaling
- The sound that only leaves — compact sources, kd ≤ 0.32 — the acoustic analogy's small-Mach limit · noise-scaling · hero
- The sound that only leaves — compact sources, kd ≤ 0.32 — the acoustic analogy's small-Mach limit · noise-scaling
- The boom that turns back before the ground — Ma 1 to 3 — standard atmosphere, no wind · nonlinear-wave
- The boom that turns back before the ground — Ma 1 to 1.3 — wind linear in height · nonlinear-wave
- The bubble that hammers — cavitation well past inception — 1.0 bar, and the model's own limit · bubble-collapse
- The sound is what does not cancel — a 1 m jet into still air at c = 340 m/s · the coefficient is borrowed · noise-scaling
- The sound is what does not cancel — a 1 m jet, c = 340 m/s · the acoustic coefficient is borrowed · noise-scaling
- The sound that only leaves — a 1 m jet into still air at c = 340 m/s · the coefficient is borrowed · noise-scaling
- The sound that only leaves — a 1 m jet, c = 340 m/s · the acoustic coefficient is borrowed · noise-scaling
- The boom that turns back before the ground — Ma 1.1 to 2 at 11 km — no wind · nonlinear-wave · hero
- The boom that turns back before the ground — Ma 1.1 to 2 at 11 km — no wind · nonlinear-wave
- A boom is aged in the thin air it starts in — design margin 1.25; Ma 1.8 — geometrical acoustics and the inviscid Burgers age along each ray; standard atmosphere, 15 km, no wind, no absorption · nonlinear-wave
- The boom that turns back before the ground — Ma 1.3 to 2 at 15 km — no wind · nonlinear-wave
- The boom that turns back before the ground — Ma 1.3 to 2 at 15 km — no wind · nonlinear-wave
- The edge is a rumble, not a quieter bang — Ma 1.3 to 2.5 — linear acoustics, a standard atmosphere, 15 km · nonlinear-wave · hero
- The edge is a rumble, not a quieter bang — Ma 1.3 to 2.5 — linear acoustics, a standard atmosphere, 15 km · nonlinear-wave
- A boom is aged in the thin air it starts in — Ma 1.8 — geometrical acoustics and the inviscid Burgers age along each ray; standard atmosphere, 15 km, no wind, no absorption · nonlinear-wave · hero
- A boom is aged in the thin air it starts in — Ma 1.8 — geometrical acoustics and the inviscid Burgers age along each ray; standard atmosphere, 15 km, no wind, no absorption · nonlinear-wave
- A boom is aged in the thin air it starts in — Ma 1.8 — geometrical acoustics and the inviscid Burgers age along each ray; standard atmosphere, 15 km, no wind, no absorption · nonlinear-wave
- The edge is a rumble, not a quieter bang — Ma 1.8 — linear acoustics, a standard atmosphere · nonlinear-wave
- The bubble that hammers — cavitation well past inception — 10.0 bar, and the model's own limit · bubble-collapse
- A boom is aged in the thin air it starts in — geometrical acoustics and the inviscid Burgers age along each ray; standard atmosphere, 15 km, no wind, no absorption · nonlinear-wave
- A boom is aged in the thin air it starts in — geometrical acoustics and the inviscid Burgers age along each ray; standard atmosphere, 15 km, no wind, no absorption · nonlinear-wave
- A boom is aged in the thin air it starts in — geometrical acoustics and the inviscid Burgers age along each ray; standard atmosphere, 15 km, no wind, no absorption · nonlinear-wave
- A boom is aged in the thin air it starts in — geometrical acoustics and the inviscid Burgers age along each ray; standard atmosphere, 15 km, no wind, no absorption · nonlinear-wave
- The sound now is the source then — closest approach 100 m, sound speed 340 m/s — acoustic · what-a-gas-carries-forward