Abstract
The effects of the dissolved air concentration and atmospheric pressure on the motion of a rigid sphere along a wall in a fluid are studied experimentally. These effects are the result of the occurrence of a gas bubble in the lubrication layer between the moving sphere’s and the wall. It is found that, depending on the air concentration in the fluid and the atmospheric pressure, during the sphere motion the bubble volume may either increase or remain constant. From the observations, it is clear that the variation of the bubble volume is associated with the unsteady motion of the sphere.
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Original Russian Text © P.V. Kozlov, A.N. Prokunin, R.V. Slavin, 2007, published in Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, 2007, Vol. 42, No. 6, pp. 93–102.
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Kozlov, P.V., Prokunin, A.N. & Slavin, R.V. Effects of atmospheric pressure and air concentration in the fluid on the motion of a rigid sphere along a wall (experiment). Fluid Dyn 42, 950–958 (2007). https://doi.org/10.1134/S0015462807060105
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DOI: https://doi.org/10.1134/S0015462807060105