ARTICLE NO. CS974800 NOTE Asymmetric Instability of a Viscous Liquid Jet that the gas to liquid density ratio is high because of the elevated gas pressure. Therefore, it is important to investigate the instability of the jet
The spatial instability of a viscid liquid jet issued into an inviscid under these practical conditions. The main objective of the present effort surrounding gas medium is considered. The numerical solution of is to explore the range of the gas to liquid density ratio for which the the governing equations is used to study the evolution of axisymasymmetric disturbances possess a higher growth rate than axisymmetric metrical and asymmetrical disturbances. It is found that asymmetones. The effects of Weber number and liquid viscosity, through Ohnesorge rical disturbances may become dominant at high Weber number. number, are expounded. The spatial instability analysis of Lin and Webb Increasing gas to liquid density ratio and/or decreasing Ohnesorge (12) will be extended to high Weber number and employed in the present number enhances the dominance of asymmetrical disturbances. A work. A spatial analysis is more appropriate than a temporal analysis for high gas to liquid density ratio is sufficient to sustain the prevathe study of the growth of disturbances on the surface of a liquid jet (15). lence of asymmetrical disturbances at moderate values of Weber number. α§ 1997 Academic Press ANALYSIS Key Word: liquid jet atomization.
Lin and Webb (12) considered the spatial instability of a viscous liquid jet emanated into an inviscid gas medium with respect to disturbances of the form