Gas-Liquid Interfaces and Flow Characteristics of a Highly Water-Repellent Sphere in Newtonian Fluids
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概要
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We clarified the effect of the gas-phase film on the fall velocity of a highly water-repellent sphere in Newtonian fluids. Experiments were carried out for the measurements of physical properties of the gas-liquid interface and the fall velocity by the falling sphere method in the Reynolds number range of 93.2<<I>Re</I><10032. The thicknesses of the gas-phase films around the sphere were about 61-91μm. The terminal velocity of the highly water-repellent sphere decreased more than that of the normal smooth sphere and the maximum drag reduction ratio was 14.6% for the highly water-repellent surface at <I>Re</I>=93.2.
- 一般社団法人 日本機械学会の論文
一般社団法人 日本機械学会 | 論文
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