Abstract
Time dependences of distilled water drop diameter were obtained experimentally after its falling on a heated copper substrate from a height of 0.09 m. The temperature of the solid surface ( Tw ) varied from 333 to 413 K in steps of 20 K. The effect on the drop dynamics after falling and the maximum ratio of the spreading diameter to the drop diameter in flight ( βmax ) were determined.
Highlights
Drop falling is implemented in the technological processes of inkjet printing, spraying, plasmodynamic synthesis, fuel injection in the internal combustion engine, gas turbine operation, drop-cooling systems [1,2,3,4,5,6]
A drop spreading over a solid surface is found to depend on the gravity forces, inertia, viscosity, friction and surface tension [7,8,9,10]
The behavior of a liquid on a heated surface was determined by the dimensionless temperature T* [11]: T * Tw, (1)
Summary
Drop falling is implemented in the technological processes of inkjet printing, spraying, plasmodynamic synthesis, fuel injection in the internal combustion engine, gas turbine operation, drop-cooling systems [1,2,3,4,5,6]. The behavior of a liquid on a heated surface was determined by the dimensionless temperature T* [11]: T * Tw , (1) The aim of the paper is to determine the dynamics of a drop (change of the geometric shape) of distilled water when it falls freely onto a heated copper surface.
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