A numerical study of transient deformation and drag properties of accelerating and decelerating liquid drops

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Abstract

A numerical study of the transient deformation and drag properties of decelerating and accelerating drops with an axisymmetric drop assumption is conducted. The incompressible Navier-Stokes equations coupled with VOF (Volume of Fraction) model are solved. The differences in the deformation and drag characteristics between the accelerating and decelerating drops are enunciated clearly. The effect of Weber number We on the deformation and drag characteristics is studied at big drop/gas destiny ratio and at small Ohnesorge number Oh. There are differences in the transient Reynolds number Re, diameter D and drag coefficient Cd between the decelerating and accelerating drops at the same We. It is important to note that the critical Weber number for drop breakup is different between the decelerating and accelerating drops; this phenomenon is uncovered for the first time in this paper.

Original languageEnglish
Title of host publication46th AIAA Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104367
DOIs
StatePublished - 2016
Event46th AIAA Fluid Dynamics Conference, 2016 - Washington, United States
Duration: Jun 13 2016Jun 17 2016

Publication series

Name46th AIAA Fluid Dynamics Conference

Conference

Conference46th AIAA Fluid Dynamics Conference, 2016
Country/TerritoryUnited States
CityWashington
Period06/13/1606/17/16

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