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Calculation of the flow about a sphere and the drag of the sphere under laminar and strongly turbulent conditions

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Abstract

To investigate the influence of a strongly turbulent incoming flow on the hydrodynamic drag of a body and occurrence of the early crisis of drag, a numerical experiment is conducted in which a free gas flow about a sphere is simulated for two cases, namely, for a laminar flow and for a strongly turbulent flow. Turbulence is simulated by assuming a high kinematic coefficient of turbulent viscosity. Calculation data lead us to conclude that the early crisis of drag at Reynolds numbers near 100, which shows up as a considerable (four-to sevenfold) decrease in the hydrodynamic force and the drag coefficient of the body, can be explained by the strong turbulence of the incoming flow.

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Authors and Affiliations

  1. Yaroslavl State Technical University, Moskovskii pr. 88, Yaroslavl, 150023, Russia

    N. N. Simakov

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  1. N. N. Simakov
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Correspondence to N. N. Simakov.

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Original Russian Text © N.N. Simakov, 2013, published in Zhurnal Tekhnicheskoi Fiziki, 2013, Vol. 83, No. 4, pp. 16–20.

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Simakov, N.N. Calculation of the flow about a sphere and the drag of the sphere under laminar and strongly turbulent conditions. Tech. Phys. 58, 481–485 (2013). https://doi.org/10.1134/S1063784213040233

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  • DOI: https://doi.org/10.1134/S1063784213040233

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