Secondary breakup of axisymmetric liquid drops. I. Acceleration by a constant body force

摘要: The secondary breakup of liquid drops, accelerated by a constant body force, is examined for small density differences between the drops and surrounding fluid. Two cases are in detail: ratio close to unity (ρd/ρo=1.15, where Boussinesq approximation valid) ten. A finite difference/front tracking numerical technique used solve unsteady Navier–Stokes equations both controlled Eotvos number (Eo), Ohnesorge (Oh), viscosity ratios. If viscous effects (small Oh), main controlling parameter. In limit, as Eo increases break up backward facing bag, transient breakup, forward bag mode. At ten, similar modes observed, with exception that mode replaced shear Similar have been seen experimentally much larger Although at low Oh, small, comparisons simulations inviscid flows show phenomenon, due boundary layer separation formation wake. higher modify evolution, effect increasing Oh move different Eo. results summarized “breakup maps” shown Eo–Oh plane values