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Calculation of the drag and heat transfer from a sphere in the gas flow in a cylindrical channel

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Abstract

A numerical experiment on the simulation of heat transfer from a sphere to a gas flow in a cylindrical channel in the Stokes and transient flow regimes has been described. Radial and axial profiles of the gas temperature and the dependences of drag coefficient C d of the body and Nusselt number Nu on Reynolds number Re have been calculated and analyzed. The problem of the influence of the early drag crisis for a sphere on its heat transfer to the gas flow has been considered. The estimation of this phenomenon has shown that the early drag crisis of the sphere in a strongly turbulent flow causes a reduction in heat transfer from the sphere to the gas by three to six times (in approximately the same proportion as for its drag coefficient).

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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.

Additional information

Original Russian Text © N.N. Simakov, 2016, published in Zhurnal Tekhnicheskoi Fiziki, 2016, Vol. 86, No. 9, pp. 32–38.

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Simakov, N.N. Calculation of the drag and heat transfer from a sphere in the gas flow in a cylindrical channel. Tech. Phys. 61, 1312–1318 (2016). https://doi.org/10.1134/S1063784216090231

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  • DOI: https://doi.org/10.1134/S1063784216090231

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