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Splitting dynamics of coherent structures in a transitional round-pipe flow

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Abstract

Direct numerical modeling of scenarios of the initiation, development, and mutual transitions of coherent turbulent structures in a round pipe at Reynolds numbers 1800 ≤ Re ≤ 4000 is performed. High-accuracy computations were performed for very prolonged time intervals, which made is possible to reveal the fundamental long-lived and statistically stationary flow modes in the transient region between the laminar and established turbulent modes. Reclassification of coherent structures describing the splitting dynamics of the subcritical laminar-turbulent transition is proposed.

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Authors and Affiliations

  1. Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, Miusskaya pl. 4, Moscow, 125047, Russia

    V. G. Priymak

  2. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Pyzhevskii per. 3, Moscow, 109017, Russia

    V. G. Priymak

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  1. V. G. Priymak
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Correspondence to V. G. Priymak.

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Original Russian Text © V.G. Priymak, 2013, published in Doklady Akademii Nauk, 2013, Vol. 452, No. 5, pp. 518–524.

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Priymak, V.G. Splitting dynamics of coherent structures in a transitional round-pipe flow. Dokl. Phys. 58, 457–463 (2013). https://doi.org/10.1134/S102833581310008X

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  • DOI: https://doi.org/10.1134/S102833581310008X

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