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http://dx.doi.org/10.3795/KSME-B.2017.41.3.205

Spreading Dynamics of an Ellipsoidal Drop Impacting on a Heated Substrate  

Yun, Sungchan (School of Mechanical, Automotive and Aeronautical Engineering, Korea Nat'l. Univ. of Transportation)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.41, no.3, 2017 , pp. 205-209 More about this Journal
Abstract
Unlike spherical drop impact, ellipsoidal drop impact can control the bouncing height on a heated surface by significantly altering impact behavior. To scrutinize the effect of the aspect ratio (AR) of the drop on the bounce suppression, in this study, non-axisymmetric spreading behaviors are observed from two side views and characterized based on the spreading width of the drop for horizontal principal axes. In addition, the maximum spreading width is investigated for various ARs. The results show that as the AR increases, the maximum spreading width of the minor axis increases, whereas that of the major axis shows no significant variation. In the regime of high AR and high impact velocity, liquid fragmentations by three parts are observed during bouncing. These fragmentations are discussed in this work. The hydrodynamic features of ellipsoidal drop impact will help understand bouncing control on non-wetting surfaces for several applications, such as self-cleaning and spray cooling.
Keywords
Drop Impact; Ellipsoidal Drop; Drop Spreading;
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