Journal article

The transient force profile of low-speed droplet impact: measurements and model

Benjamin R Mitchell, Joseph C Klewicki, Yannis P Korkolis, Brad L Kinsey

JOURNAL OF FLUID MECHANICS | CAMBRIDGE UNIV PRESS | Published : 2019

Abstract

The transient force exerted by a low-speed liquid droplet impinging onto a flat rigid surface is investigated experimentally. The measurements employ a high-sensitivity piezo-electric sensor, along with a high-speed camera, and cover four decades in droplet Reynolds number and greater than two decades in Weber number. Across these ranges, the peak of individual force profiles span from 3 mN to over 1300 mN. Once normalised, the force-time profiles support the existence of an inertially dominated self-similar regime. Within this regime, previous numerical and theoretical studies predict a √t dependence of impact normal force during the initial pre-peak rise. While our measurements confirm thi..

View full abstract

University of Melbourne Researchers

Grants

Awarded by US National Science Foundation


Funding Acknowledgements

This work has been performed with support from the US National Science Foundation through award CMMI-1462993.