Swept in Reynolds number — the figure is about the variation, not one value

• A force without the flow that makes it — Re from 1 to 100, and the Stokes limit · creeping-flow
• A stroke is worth the area it encloses — Re from 1 to 100, and the Stokes limit · creeping-flow
• A swimmer that cannot go backwards — Re from 1 to 100, and the Stokes limit · creeping-flow
• How small is small enough — Re from 1 to 100, and the Stokes limit · creeping-flow
• The price of a gradient — Re 1 to 100 on the diameter — steady and two-dimensional throughout · energy-budget
• The third thickness — Re 1 to 100 on the diameter — steady and two-dimensional throughout · energy-budget
• The world with no inertia — Re from 1 to 100, and the Stokes limit · creeping-flow
• Where the heat of a drag is made — Re 1 to 100 on the diameter — steady and two-dimensional throughout · energy-budget · hero
• Where the heat of a drag is made — Re 1 to 100 on the diameter — steady and two-dimensional throughout · energy-budget
• The frequency a wake chooses — Re 50 to 2,000 — a circular cylinder, laminar shedding · regime-collapse
• The frequency a wake chooses — any Reynolds number for the street; Re 50 to 2,000 for the fits · regime-collapse
• The layer every airway restarts bends Murray's cube towards the turbulent pipe's — air, Re 0.01 to 3000 along the sweep; upkeep 50 W/m³ · branch-cost
• The vorticity a clean surface cannot refuse — Re from 40 to 3000 — Moore and Schiller–Naumann are borrowed fits · extra-condition
• The vorticity a clean surface cannot refuse — Re from 40 to 3000 — Moore and Schiller–Naumann are fits · extra-condition
• A calculation with no memory in it — Re between 90 and 3,500 — the ceilings are borrowed, the requirements are not · flapping-wing
• The bee that cannot fly — Re between 90 and 3,500 — every morphological number is a measurement · flapping-wing · hero
• The bee that cannot fly — Re between 90 and 3,500 — every morphological number is a measurement · flapping-wing
• The bee that cannot fly — Re between 90 and 3,500 — the morphology is measured, the speeds are derived · flapping-wing
• The bee that cannot fly — Re between 90 and 3,500 — the ceilings are borrowed, the requirements are not · flapping-wing
• The bee that cannot fly — Re between 90 and 3,500 — the morphology is measured, both numbers derived · flapping-wing
• The bee that cannot fly — Re between 90 and 3,500 — the ceilings are borrowed, the requirements are not · flapping-wing
• The bee that cannot fly — Re between 90 and 3,500 — every morphological number is a measurement · flapping-wing
• The layer every airway restarts bends Murray's cube towards the turbulent pipe's — air, Re 2 to 3500 across generations 1–16 at 1 L/s · branch-cost · hero
• The layer every airway restarts bends Murray's cube towards the turbulent pipe's — air, Re 2 to 3500 across generations 1–16 at 1 L/s · branch-cost
• The layer every airway restarts bends Murray's cube towards the turbulent pipe's — air, Re 2 to 3500 in generations 1–11 at 1 L/s; the exponents hold where Pedley’s factor exceeds one · branch-cost
• The layer every airway restarts bends Murray's cube towards the turbulent pipe's — air, Re 2 to 3500 across generations 1–16 at 1 L/s · branch-cost
• A trailing wake hurries a pair together — 2-D; Gaussian wakes carrying the drag, b² = 1 + 8ξ/Re; shear lift coefficient one; Re 20 to 2·10⁴ · ideal-cylinder
• A trailing wake hurries a pair together — 2-D; Gaussian wakes carrying the drag, b² = 1 + 8ξ/Re; shear lift coefficient one; Re 20 to 2·10⁴ · ideal-cylinder
• A trailing wake hurries a pair together — 2-D; Gaussian wakes carrying the drag, b² = 1 + 8ξ/Re; shear lift coefficient one; Re 20 to 2·10⁴ · ideal-cylinder
• A trailing wake hurries a pair together — 2-D; Gaussian wakes carrying the drag, b² = 1 + 8ξ/Re; shear lift coefficient one; Re 20 to 2·10⁴ · ideal-cylinder
• The vorticity a clean surface cannot refuse — Re from 10 to 10⁴, near the front stagnation point of a sphere · extra-condition
• The layer every airway restarts bends Murray's cube towards the turbulent pipe's — air, Re of each airway as the dialled flow sets it, Re 2 to 17000 · branch-cost
• The layer every airway restarts bends Murray's cube towards the turbulent pipe's — air, Re 170 to 28000 in the first generation · branch-cost
• A round jet hands its wall jet a strength proportional to its throw — laminar jets in water, Re 100 to 40000 along the sweep · laminar-jet
• A wire sings with the force on it, not the flow round it — subcritical cylinders, Re 10³–10⁵ · noise-scaling
• Drag makes every free pair meet — 2-D; drag 2Cd/π along the stream, Cd/π across; a cylinder's Cd, Re 100 to 10⁵ · ideal-cylinder · hero
• Drag makes every free pair meet — 2-D; drag 2Cd/π along the stream, Cd/π across; a cylinder's Cd, Re 100 to 10⁵ · ideal-cylinder
• Drag makes every free pair meet — 2-D; drag 2Cd/π along the stream, Cd/π across; a cylinder's Cd, Re 100 to 10⁵ · ideal-cylinder
• Drag makes every free pair meet — 2-D; drag 2Cd/π along the stream, Cd/π across; a cylinder's Cd, Re 100 to 10⁵; from six radii · ideal-cylinder
• Drag makes every free pair meet — 2-D; drag 2Cd/π along the stream, Cd/π across; a cylinder's Cd, Re 100 to 10⁵; from four radii · ideal-cylinder
• Drag makes every free pair meet — small swings about side by side; a cylinder's drag coefficient, Re 100 to 10⁵ · ideal-cylinder
• Drag makes every free pair meet — 2-D; drag 2Cd/π along the stream, Cd/π across; a cylinder's Cd, Re 100 to 10⁵; from 85° · ideal-cylinder
• Drag makes every free pair meet — 2-D; drag 2Cd/π along the stream, Cd/π across; a cylinder's Cd, Re 100 to 10⁵ · ideal-cylinder
• The drag that falls as it speeds up — Re 8.8e+4 to 1.3e+5 along the flight · sphere-drag
• The ball that never forgets its spin — sea-level air; one calibrated spin-down coefficient throughout — Re from 3e4 to 2e5 across the six balls · how-long-a-machine-remembers
• The ball that never forgets its spin — the shot lengths are stated on the ledger — Re from 3e4 to 2e5 across the six · how-long-a-machine-remembers
• The ball that never forgets its spin — sea-level air — Re from 3e4 to 2e5 across the six balls · how-long-a-machine-remembers
• The drag that falls as it speeds up — Re 4.7e+4 to 2.0e+5 along the flight · sphere-drag
• A drive's best spin falls where players hit it only because lift tires and drag grows — golf ball, Re 100,000 to 250,000 · sphere-drag
• Three buffer layers, one friction — Re from 18,000 to 490,000 · structure-and-mixture
• A spinning ball should leave low — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag · hero
• A spinning ball should leave low — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• A spinning ball should leave low — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• A spinning ball should leave low — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• A spinning ball should leave low — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• The drag that falls as it speeds up — Re 3·10⁴ to 10⁶ — swept across the drag crisis · sphere-drag
• The drop that is not a tear — Re 3·10⁴ to 10⁶ — swept across the drag crisis · sphere-drag
• The terminal speed sets the best launch angle — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag · hero
• The terminal speed sets the best launch angle — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• The terminal speed sets the best launch angle — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• The terminal speed sets the best launch angle — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• The terminal speed sets the best launch angle — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• The terminal speed sets the best launch angle — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• The terminal speed sets the best launch angle — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• The terminal speed sets the best launch angle — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• The terminal speed sets the best launch angle — Re 10⁴ to 10⁶, past the drag crisis — Cd fixed; lengths in drag lengths, β = (U/vₜ)² · sphere-drag
• The cost of going turbulent — Re 1e+5 to 1e+7 — the two laws differ in slope · plate-friction
• The number that is not a number — Re 1e+5 to 1e+7 — the two laws differ in slope · plate-friction
• The solution that keeps its nonlinear term — Re from 10³ to 10⁷ on Omega R²/nu — laminar · oscillating-wall
• The cost of going turbulent — Re 1e+5 to 1e+8 — the ratio is what changes · plate-friction
• The cost of going turbulent — Re 1e+5 to 1e+8 — the ratio is what changes · plate-friction
• The number that is not a number — Re 1e+5 to 1e+8 — the ratio is what changes · plate-friction
• A limit nothing reaches — Re 1e+5 to 1e+9 — the ratio is what changes · plate-friction
• The cost of going turbulent — Re 1e+5 to 1e+9 — the two laws differ in slope · plate-friction · hero
• The cost of going turbulent — Re 1e+5 to 1e+9 — the two laws differ in slope · plate-friction
• The layer that stops growing — Re 1e+5 to 1e+9 — the two laws differ in slope · plate-friction
• The number that is not a number — Re 1e+5 to 1e+9 — the two laws differ in slope · plate-friction · hero
• The roughness a wall cannot feel — Re 1e+5 to 1e+9 — the two laws differ in slope · plate-friction

Every regime · All figures · All essays