Set by the Bond or Weber number — surface tension against weight or inertia

• A breaking strength that is the size of a flaw — homogeneous, flat-interface surface tension — an estimate, not a solution · absolute-pressure
• The drop that is not a tear — a two-dimensional sheet, so one curvature; depths in capillary lengths, and no drop size anywhere in it · drop-profile
• The number that cannot break a drop — Ca = μ_c γ̇a/σ in simple shear — creeping flow, no inertia anywhere · regime-collapse · hero
• The number that cannot break a drop — Ca = μ_c γ̇a/σ in simple shear — creeping flow, no inertia anywhere · regime-collapse
• The number that cannot break a drop — Ca = μ_c γ̇a/σ in simple shear — creeping flow, no inertia anywhere · regime-collapse
• The number that cannot break a drop — Ca = μ_c γ̇a/σ in simple shear — creeping flow, breakup threshold · regime-collapse
• The number that cannot break a drop — Ca → ∞ in simple shear — the saturation, not a threshold in Ca · regime-collapse
• The number that cannot break a drop — Ca = μ_c γ̇a/σ in simple shear — creeping flow, breakup threshold · regime-collapse
• The number that cannot break a drop — Ca → ∞ in simple shear — the saturation, not a threshold in Ca · regime-collapse
• The number that cannot break a drop — Ca = μ_c γ̇a/σ — creeping flow, planar linear flows only · regime-collapse
• The size a drop is allowed — a two-dimensional sheet, so one curvature; depths in capillary lengths, and no drop size anywhere in it · drop-profile
• The size a drop is allowed — a two-dimensional sheet, so one curvature; depths in capillary lengths, and no drop size anywhere in it · drop-profile
• What a plate takes with it — a two-dimensional sheet, so one curvature; depths in capillary lengths, and no drop size anywhere in it · drop-profile
• Where a jet stops being a jet — set by the Weber number — a liquid jet issuing into a gas at rest · jet-breakup · hero
• Where a jet stops being a jet — set by the Weber number — a liquid jet issuing into a gas at rest · jet-breakup
• Where a jet stops being a jet — set by the Weber number — the gas's inertia against the jet's surface tension · jet-breakup
• Where a jet stops being a jet — set by the Weber number — the branch ends at a borrowed transition · jet-breakup
• Where a jet stops being a jet — set by the Weber number — this nozzle is in the Rayleigh break-up regime · jet-breakup
• Where a jet stops being a jet — set by the Weber number — the regime names and their thresholds are borrowed · jet-breakup
• Where a jet stops being a jet — set by the Weber number — a liquid jet issuing into a gas at rest · jet-breakup
• Where a jet stops being a jet — set by the Weber number — the gas's inertia against the jet's surface tension · jet-breakup
• Where a jet stops being a jet — set by the Weber number — this nozzle is in the Rayleigh break-up regime · jet-breakup
• The drop a no-slip wall would never let spread — water in air — Ca from 10⁻⁶ to 1, the upper end outside Stokes flow · coating-film
• What a plate takes with it — water at 20 °C — Ca from 10⁻⁶ to 10⁻², the last three outside the range · coating-film · hero
• What a plate takes with it — water at 20 °C — Ca from 10⁻⁶ to 10⁻², the last three outside the range · coating-film
• What a plate takes with it — Ca between 10⁻⁶ and 10⁻¹ — the last of these is outside the derivation · coating-film
• The drop a no-slip wall would never let spread — water — Ca = 1.4 × 10⁻⁵, Stokes flow in the corner · coating-film · hero
• The drop a no-slip wall would never let spread — water — Ca = 1.4 × 10⁻⁵, Stokes flow in the corner · coating-film
• What a plate takes with it — Ca below 10⁻³ — a long bubble, no gravity, and a film thin against the radius · coating-film
• The drop a no-slip wall would never let spread — Ca ≪ 1 and no inertia — the solution has no length in it at all · coating-film
• The drop a no-slip wall would never let spread — Ca ≪ 1 — every check in the thin-film and Stokes-flow range · coating-film
• The drop that is not a tear — linear in the distortion, so quantitative below We ≈ 1 and indicative above; the poles meet at We = 32/3 · drop-profile · hero
• The drop that is not a tear — linear in the distortion, so quantitative below We ≈ 1 and indicative above; the poles meet at We = 32/3 · drop-profile
• The drop that is not a tear — linear in the distortion, so quantitative below We ≈ 1 and indicative above; the poles meet at We = 32/3 · drop-profile
• The number that cannot break a drop — Ca = μ_c γ̇a/σ in simple shear — creeping flow, viscosity ratio 1 · regime-collapse
• The size a drop is allowed — linear in the distortion, so quantitative below We ≈ 1 and indicative above; the poles meet at We = 32/3 · drop-profile
• What a plate takes with it — Ca ≪ 1 — the equation has no parameter in it, so neither has the constant · coating-film
• The number that cannot break a drop — Ca = 3 throughout — the flow type is the variable, not the strength · regime-collapse
• A threshold that is also a duration — a 5 micron air bubble in water at one atmosphere · how-long-a-machine-remembers · hero
• A threshold that is also a duration — a 5 micron air bubble in water at one atmosphere · how-long-a-machine-remembers
• A threshold that is also a duration — a bubble whose rest radius is 5 microns · how-long-a-machine-remembers
• A breaking strength that is the size of a flaw — water at 20 °C — below a nanometre a continuum surface tension is itself in doubt · absolute-pressure
• The vorticity a clean surface cannot refuse — air in water at 20 °C; spherical bubbles only, Weber number below one · extra-condition · hero
• The vorticity a clean surface cannot refuse — air in water at 20 °C; spherical bubbles only, Weber number below one · extra-condition
• The air that breaks a siphon nothing else can — vertical tube, Eötvös 21.0 — surface tension neglected in the drift · siphon-profile
• The drop a no-slip wall would never let spread — a 100 cSt silicone oil, perfect wetting — Ca ≪ 1, gravity neglected · coating-film
• The size a drop is allowed — a sessile drop at 100° contact angle; no flow anywhere in the picture · drop-profile
• The size a drop is allowed — a sessile drop at 140° contact angle; no flow anywhere in the picture · drop-profile
• The drop that is not a tear — a sessile drop at 180°; the Bond number is formed on the equivalent sphere · drop-profile
• The drop that is not a tear — a sessile drop at 180° contact angle; no flow anywhere in the picture · drop-profile
• The size a drop is allowed — a sessile drop at 180°; the Bond number is formed on the equivalent sphere · drop-profile · hero
• The size a drop is allowed — a sessile drop at 180°; the Bond number is formed on the equivalent sphere · drop-profile
• The size a drop is allowed — a sessile drop at 180° contact angle; no flow anywhere in the picture · drop-profile
• The drop that is not a tear — water in air at 1.204 kg/m³, Re from 60 to 5,000 — the drag law's own range · drop-profile
• The size a drop is allowed — water in air at 1.204 kg/m³, Re from 60 to 5,000 — the drag law's own range · drop-profile

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