Abstract
The mass of liquid remaining on a substrate following a drop impact is a crucial quantity for modelling of numerous phenomena, e.g. spray cooling, spray coating or aircraft icing. In the present study, a method to measure this residual mass after impact of liquid drops is introduced. This method is also applicable to supercooled drops, which may freeze upon impact on cold surfaces. Using the data obtained from extensive measurements in which the size, impact speed and temperature of the drops was varied, a modelling of the residual mass is formulated, following closely the theory of Riboux and Gordillo (Phys Rev Lett 113(2):024507, 2014. https://doi.org/10.1103/PhysRevLett.113.024507). A key adaptation of this model accounts for the deformation of drops immediately prior to impact. This modified theoretical model results in very good agreement with experiments, allowing prediction of residual mass for a given impact situation.Graphical abstract
Highlights
Drop impact is a widely studied phenomenon in the laboratory with a myriad of applications in both the physical and life sciences
For a single drop impact, the splashing threshold is determined by the impact parameters, liquid properties and the relative initial wall film thickness (Cossali et al 1997)
A method for determining the volume of liquid residing on the substrate after a drop impact at high Reynolds and Weber number has been introduced
Summary
Drop impact is a widely studied phenomenon in the laboratory with a myriad of applications in both the physical and life sciences. The hydrodynamics have been extremely well elucidated, experimentally, numerically and theoretically (Yarin 2006; Josserand and Thoroddsen 2016; Yarin et al 2017), one quantity remains extremely elusive. 1 3 Vol.:(0123456789) 204 Page 2 of 11
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