Vorticity and contraction times. Contraction time to a semi-aster tcont/τ
(left axis; solid circles) and vorticity (right axis; open squares) versus pressure P/P0 for kA/kD = 35 and kMτ
= 7.5 × 10-3. The contraction time was determined by the fit of the radius to a hyperbolic tangent, or assigned the maximum value of tcont = 1.6 × 104τ
if no contraction had occurred within this time. Each point represents 5 independent runs.