Abstract
The instability of a thin liquid jet in a stationary atmosphere was analyzed by solving numerically the Orr-Sommerfeld equation for both sinuous disturbances and dilational disturbances. It was found that the thin liquid jet had hard mode and soft mode instability for both disturbances. Comparing theoretical results with experimental results, we discuss the possibility of the occurrence of the interfacial disturbances wave on the plane liquid jet. It could be suggested that the interfacial disturbance wave was mainly caused by the internal instability in the liquid jet flow and that the disturbance wave corresponded to the hard mode instability for the sinuous disturbance.
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