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International Conference on Numerical Computations: Theory and Algorithms

NUMTA 2019: Numerical Computations: Theory and Algorithms pp 280–288Cite as

Numerical Investigation of Natural Rough-Bed Flow

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Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 11974))

Abstract

The turbulent flow in natural rough-bed watercourses is a rather complex phenomenon, still poorly investigated. The majority of the existing works on this subject is of experimental nature, while the numerical ones are mostly related to artificially and regularly-roughened beds. In the present work a numerical investigation is carried out, in which the fully turbulent flow in an open channel is simulated, where the channel bottom is constituted by natural-pebble layers. In the numerical simulations, the Large Eddy Simulation (LES) approach is used, in conjunction with the Wall-Adapting Local Eddy viscosity (WALE) Sub-Grid Scale (SGS) closure model at Reynolds number 46,500 and Froude number 0.186. The Finite-Volume discretized governing equations are solved numerically by means of the InterFOAM solver, embedded in the OpenFOAM C++ digital library. In order to take into account the free-surface dynamics, the Volume of Fluid (VoF) method has been used. The results of the simulations are compared with those obtained in a companion experiment, mainly in terms of turbulence statistics of different order, obtaining a rather good agreement.

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Author information

Authors and Affiliations

  1. Department of Civil Engineering, University of Calabria, Via Bucci 42b, 87036, Rende, Cosenza, Italy

    Giancarlo Alfonsi, Domenico Ferraro, Agostino Lauria & Roberto Gaudio

Authors
  1. Giancarlo Alfonsi
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  2. Domenico Ferraro
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  3. Agostino Lauria
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  4. Roberto Gaudio
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Corresponding author

Correspondence to Agostino Lauria .

Editor information

Editors and Affiliations

  1. University of Calabria, Rende, Italy

    Yaroslav D. Sergeyev

  2. University of Calabria, Rende, Italy

    Dmitri E. Kvasov

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Alfonsi, G., Ferraro, D., Lauria, A., Gaudio, R. (2020). Numerical Investigation of Natural Rough-Bed Flow. In: Sergeyev, Y., Kvasov, D. (eds) Numerical Computations: Theory and Algorithms. NUMTA 2019. Lecture Notes in Computer Science(), vol 11974. Springer, Cham. https://doi.org/10.1007/978-3-030-40616-5_21

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  • DOI: https://doi.org/10.1007/978-3-030-40616-5_21

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-40615-8

  • Online ISBN: 978-3-030-40616-5

  • eBook Packages: Computer ScienceComputer Science (R0)

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