The inclusion drift in a standing sinusoidal fluid-velocity wave at various Reynolds and Strouhal numbers under the action of the viscous force, the virtual mass force, and the buoyancy force has been investigated. It has been established that at low frequencies the wave force of dense inclusions is directed to the nearest node, and for loose inclusions it is directed to the antinode of the fluid-velocity wave. For a given inclusion density, as the standing wave frequency increases, its threshold value, above which the direction of the wave force reverses, is attained sooner or later. For various Reynolds and Strouhal numbers, the dependences of the squared threshold drag coefficient on the inclusion density number have been found. These dependences show that with increasing Reynolds and Strouhal numbers the threshold value of the squared drag coefficient decreases markedly.
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 86, No. 1, pp. 50–58, January–February, 2013.
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Gubaidullin, L.A., Osipov, P.P. Influence of Reynolds and Strouhal numbers on the direction of the wave force acting on inclusions in a standing sinusoidal wave. J Eng Phys Thermophy 86, 51–61 (2013). https://doi.org/10.1007/s10891-013-0804-4
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DOI: https://doi.org/10.1007/s10891-013-0804-4