ASYMMETRIC INSTABILITY OF A VISCOUS-LIQUID JET

The spatial instability of a viscid liquid jet issued into an inviscid surrounding gas medium is considered. The numerical solution of the g overning equations is used to study the evolution of axisymmetrical an d asymmetrical disturbances. It is found that asymmetrical disturbance s may become dominant at high Weber number. Increasing gas to liquid d ensity ratio and/or decreasing Ohnesorge number enhances the dominance of asymmetrical disturbances. A high gas to liquid density ratio is s ufficient to sustain the prevalence of asymmetrical disturbances at mo derate values of Weber number. (C) 1997 Academic Press.