Fast-Valve Water-Hammer Shockwave (Joukowsky ΔP) & Arrestor Cushion Sizer

Deterministic Joukowsky acoustic wave speed c = sqrt(K_water / [rho*(1 + K*D/(E*e))]) + shock overpressure ΔP = rho * c * Δv engine (.pdf, .json, .svg) built for Caleffi, Watts, Sioux Chief, Viega — zero-upload ephemeral Wasm RAM execution.

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