Abstract
The paper presents a study of the slip velocity for almost spherical bubbles in a downward laminar tube flow. The local slip velocity is defined as a difference between the mean liquid velocity (measured with electrodiffusional method) and the mean bubble velocity (measured with a modified LDA tool with a small size of measurement volume). The law for slip velocity for downward flow is significantly different from a similar law for upward flow. This reveals that the bubble flow motion is rather random than structured in the upward flow.
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Timkin, L.S., Gorelik, R.S. Local bubble slip velocity in a downward laminar tube flow. Thermophys. Aeromech. 27, 259–268 (2020). https://doi.org/10.1134/S0869864320020080
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DOI: https://doi.org/10.1134/S0869864320020080