Does liquid film temperature affects single drop impact dynamics?

AFSF Mendes, DFS Ribeiro, MRO Panão, A Silva - ASTFE Digital …, 2023 - dl.astfe.org
ASTFE Digital Library, 2023dl.astfe.org
The effect of liquid film dynamics in the hydrodynamics of an isolated drop impact is a
complex phenomenon and not fully understood. Therefore, in this work, an experimental
setup built to characterize the impact of an isolated droplet on heated and unheated liquid
films consists of a heating element made of an aluminum block with resistances to produce
several impact conditions. The parametric studies include the drop impact velocity and size
for different fluids to evaluate their properties effect on the phenomena. The results were …
Abstract
The effect of liquid film dynamics in the hydrodynamics of an isolated drop impact is a complex phenomenon and not fully understood. Therefore, in this work, an experimental setup built to characterize the impact of an isolated droplet on heated and unheated liquid films consists of a heating element made of an aluminum block with resistances to produce several impact conditions. The parametric studies include the drop impact velocity and size for different fluids to evaluate their properties effect on the phenomena. The results were compared with existing thresholds in the literature to evaluate their validity and applicability range. This comparison allows us to assess if temperature causes the limits of the thresholds to change drastically or if its influence is negligible. Regarding IC engines, thresholds like splashing and bubble encapsulation are significant since they influence the atomization of the mixture and, consequently, the pollutant emissions.
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