Abstract
The experimental investigation of water droplet deformation (characteristic dimensions 3 ÷ 6 mm) when moving through the gas area (air) with 1÷ 5 m/s velocities was carried out. The high-speed (delay time between the frames is less than 100 ns) tools of cross-correlation videorecording were used. A cyclic change nature of the droplet shapes (from close to spherical to conditionally ellipsoidal) was found. The characteristic times of “deformation cycles” and the maximal deviations of droplet dimensions relative to initial dimensions were determined. The influence of droplet velocities and its dimensions on the deformation characteristics was determined.
Highlights
The liquid droplet shape variability under its motion through the gas area was experimentally determined sufficiently long ago [1, 2]
The advent of video- and cross-correlation cameras with a high frame sampling and determination procedures of particle and droplet dimensions predetermined the investigations of deformation, crushing and coagulation mechanisms of droplets in various gas areas [3,4,5]
The numerical value determination of main droplet deformation process characteristics for the most typical and widely used in various applications liquid when moving through the gas area with low speeds is of interest
Summary
The liquid droplet shape variability under its motion through the gas area (in particular, during free falling in the air) was experimentally determined sufficiently long ago [1, 2]. The advent (during the last decade) of video- and cross-correlation cameras with a high frame sampling and determination procedures of particle and droplet dimensions predetermined the investigations of deformation, crushing and coagulation mechanisms of droplets in various gas areas [3,4,5]. The numerical value determination (using the high-speed video- and cross-correlation cameras) of main droplet deformation process characteristics for the most typical and widely used in various applications liquid (water) when moving through the gas area with low (less than 5 m/s) speeds is of interest. The purpose of this article is the experimental determination of numerical parameter values and water droplet configuration change mechanism when moving through the gas area
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