Abstract
Flows in which a low density (gaseous) phase contributes to the motion of a free surface have been studied numerically using boundary element methods. A stable, time-accurate integration scheme for the coupled, nonlinear free surface boundary conditions is described for the case where both phases are incompressible and inviscid. The effect of increasing the gas liquid density ratio on the stability of the methodology is briefly discussed. The technique is illustrated through a series of examples involving: an infinite-length (periodic) liquid jet in a ‘wind-induced’ flow regime; a two-dimensional liquid column subjected to acoustic excitation; and a finite-length liquid jet injected into a quiescent gas.
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