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

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Effect of liquid viscosity on the aerodynamic breakup of non-spherical droplets
Konstantinos Bergeles, Georgios Charalampous, Yannis Hardalupas, Alex M. Taylor

Last modified: 18-07-2017

Abstract


This paper studies the effect of liquid viscosity on the atomisation regimes of initially spherical and non-sphericaldroplets and also kinematic characteristics of non-spherical droplets. The droplets consisted of water-glycerolsolutions with viscosities ranging from 6.3 to 697 mPa s, and the initial aspect ratio was 1<AR<2. The range of Wenumber was from 10 to 200 and of the Oh number from 0.01 to approximately 4. The experimental findings showedthat the equivalent Weeq and Oheq numbers, proposed in previous work [1] for water droplets, are also applicableto spherical and non-spherical droplets in the range of Oh numbers of this study in order to classify the breakupregimes on the existing morphological charts. The kinematic characteristics of the centre of mass for droplets withAR=1.2 are evaluated and the role of viscosity examined in the no breakup and bag-stamen regimes.

DOI: http://dx.doi.org/10.4995/ILASS2017.2017.4675


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