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ULTRASONIC ATOMIZATION OF LIQUIDS: STABILITY ANALYSIS OF THE VISCOUS LIQUID FILM FREE SURFACE
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References
1998
Year
EngineeringLiquid-liquid FlowFluid MechanicsMechanical EngineeringWettingAcoustic CavitationSonoelectrochemistryPower UltrasoundSonochemistryRheologyStability AnalysisMaterials SciencePhysicsHydrodynamic CavitationSurface TensionUltrasoundMultiphase FlowHydrodynamic InstabilityInterfacial PhenomenonSurface ScienceApplied PhysicsHydrodynamicsFluid-solid InteractionLinear Analysis
One of the fundamental steps in the process of liquid film ultrasonic atomization is the hydrodynamic instability. The resulting surface waves become unstable and tear. This causes a mist of uniform droplets to be formed and ejected. The study of ideal liquid film free surface behavior in the steps prior to droplet formation leads to a stability analysis based on the Mathieu-Hill equation. Unfortunately, a similar analysis cannot realistically be developed for a viscous liquid. The present work performs a linear analysis derived from the hydrodynamics, which allows a stability analysis of viscous bounded liquid film free surface. Actual results are compared to those obtained in the case of an inviscid fluid.