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Related Experiment Video

Updated: May 24, 2026

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

Published on: August 7, 2018

Drop impact on superheated surfaces.

Tuan Tran¹, Hendrik J J Staat, Andrea Prosperetti

¹Physics of Fluids, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands. t.tran@utwente.nl

Physical Review Letters

|March 10, 2012

Summary

This summary is machine-generated.

Liquid droplet impact on hot surfaces exhibits distinct behaviors: contact boiling, gentle film boiling, or spraying film boiling. Maximum spreading in film boiling regimes universally scales with Weber number, differing from non-heated surfaces.

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Area of Science:

Fluid dynamics
Heat transfer
Surface science

Background:

Liquid droplet impact on heated surfaces can lead to diverse phenomena.
Understanding these regimes is crucial for applications involving boiling and heat transfer.

Purpose of the Study:

To experimentally determine the conditions for different droplet impact regimes on heated surfaces.
To investigate the scaling laws governing droplet spreading in film boiling regimes.

Main Methods:

Experimental observation of liquid droplet impact on heated surfaces.
Interferometric measurement of vapor layer thickness.
Analysis of droplet spreading dynamics using dimensionless numbers (Weber number, maximum spreading).

Main Results:

Identified conditions for contact boiling, gentle film boiling, and spraying film boiling.
Demonstrated a universal scaling law (γ~We(2/5)) for maximum droplet spreading in gentle and spraying film boiling regimes.
Observed a steeper spreading-Weber number relationship compared to non-heated surfaces (γ~We(1/4)).

Conclusions:

The spreading dynamics of impacting droplets on heated surfaces are significantly influenced by boiling regimes.
The universal scaling law highlights a distinct behavior of droplet impact in film boiling compared to non-boiling scenarios.