Experimental study on air-water interface properties in self-aerated flows
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Microscopic air-water structures and interface area properties in self-aerated flows are the important interests in high-speed self-aerated flows. The present experimental study investigates mean and medium air chord length distributions in self-aerated chute flows for different flow Reynolds number and air concentration conditions. The relationship between microscopic and macroscopic aerated properties in air-water mixture region is analyzed. The distribution of microscopic specific air-water interface area with macroscopic air concentration variation remains self-similarity in self-aerated region. Considering the air-water structure differences in high and low aerated region, a new relationship is proposed for predicting the distributions of a specific air-water interface area, and the agreement between the measured and predicted results is satisfactory.
Key wordsAir-water interface area self-aeration air chord size chute flow experimental study
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