Post-spreading behavior of impacting fuel drops on stainless steel surface

Bhat, Maanasa and Sivakumar, D (2019) Post-spreading behavior of impacting fuel drops on stainless steel surface. In: EXPERIMENTAL THERMAL AND FLUID SCIENCE, 102 . pp. 74-80.

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Abstract

Hydrocarbon fuel drops impacting on metallic solid surfaces kept at room temperature exhibit no receding after the completion of early inertia-driven primary spreading. The experimental data of impacting drops of different fuels on a smooth stainless steel surface reveal a sluggish spreading, referred to as post-spreading, after reaching the maximum spreading diameter at the end of primary spreading. A systematic analysis involving maximum spreading factor, final spreading factor and temporal variation of post-spreading diameter of impacting fuel drops of varying Weber number is reported to describe the behavior of the post-spreading process. It is found that the dynamics of post-spreading of impacting fuel drops is different from Tanner's spreading as the exponent n in the power law describing the temporal spreading behavior (beta proportional to tau(n)) varies with Weber number and is significantly less than 0.1. The extent of post-spreading is found to be as high as 20% of the maximum spread factor for the impact of low Weber number fuel drops. Due to the presence of post-spreading, the final spread factor of impacting fuel drops is always higher than the maximum spread factor.

Item Type:	Journal Article
Publication:	EXPERIMENTAL THERMAL AND FLUID SCIENCE
Publisher:	ELSEVIER SCIENCE INC
Additional Information:	Copyright of this article belongs to ELSEVIER SCIENCE INC
Keywords:	Fuel drop spreading; Drop impact; Drop collision; Wetting; Final spreading diameter
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	18 Feb 2019 06:27
Last Modified:	18 Feb 2019 06:27
URI:	http://eprints.iisc.ac.in/id/eprint/61741

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