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Characteristics of turbulent-exchange coefficients in a viscous underlayer

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Abstract

The transient equations for longitudinal (along the flow) velocity pulsations and pulsations of concentration in the region of a viscous underlayer are considered. Estimates based on experimental data enable the contributions arising from certain terms of these equations to be neglected in turbulent transfer. Subject to this approximation, expressions are obtained for the turbulent viscosity and diffusion coefficients. These coefficients behave differently in the case of large Schmidt (Prandtl) numbers. The behavior of the turbulent Schmidt number in the region of the viscous underlayer is analyzed.

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Authors and Affiliations

  1. Novosibirsk

    P. I. Geshev

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  1. P. I. Geshev
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Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 2, pp. 61–66, March–April, 1974.

The author is grateful to S. S. Kutateladze, V. E. Nakoryakov, M. A. Gol'dshtik, and V. N. Shtern for discussing the results of this investigation.

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Geshev, P.I. Characteristics of turbulent-exchange coefficients in a viscous underlayer. J Appl Mech Tech Phys 15, 196–200 (1974). https://doi.org/10.1007/BF00850658

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  • DOI: https://doi.org/10.1007/BF00850658

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