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Evolution of free-field collapse (ps/po = 353): (a) Rayleigh collapse at times (a) t/(Ro/cL) = 0.265, (b) t/(Ro/cL) = 3.98, (c) t/(Ro/cL) = 6.98 and (b) shock-induced collapse at times (d) t/(Ro/cL) = 0.280, (e) t/(Ro/cL) = 5.79, (f) t/(Ro/cL) = 8.02. Top: density lines; bottom: pressure contours non-dimensionalized by (approximate interface location: γ = 1.42 contour).
