Polytechnic University of Valencia Congress, ILASS2017 - 28th European Conference on Liquid Atomization and Spray Systems

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Experimental and Computational Investigation of binary drop collisions under elevated pressure
Louis Maximilian Reitter, Muyuan Liu, Jan Breitenbach, Kuan-Ling Huang, Dieter Bothe, Günter Brenn, Kuo-Long Pan, Ilia V. Roisman, Cameron Tropea

Last modified: 18-07-2017

Abstract


Spray systems often operate under extreme ambient conditions like high pressure, which can have a significant influence on important spray phenomena. One of these phenomena is binary drop collisions. Such collisions, depending on the relative velocity and the impact parameter (eccentricity of the collision), can lead to drop bouncing, coalescence or breakup. This experimental and computational study is focused on the description of the phenomenon of drop bouncing, which is caused by a thin gas layer preventing the drops coalescence. To identify the main influencing parameters of this phenomenon, experiments on binary drop collisions are performed in a pressure chamber. This experimental system allows us to investigate the effect of an ambient pressure (namely the density and viscosity of the surrounding gas) on the bouncing/coalescence threshold.

DOI: http://dx.doi.org/10.4995/ILASS2017.2017.4758


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