Local scour around structures and the phenomenology of turbulence
Local scour around structures and the phenomenology of turbulence
The scaling of the scour depth of equilibrium at the base of a solid cylinder immersed within an erodible granular bed and impinged by a turbulent shear flow is investigated here, for the first time, by means of the phenomenological theory of turbulence. The proposed theory allows the derivation of a predictive formula that (i) includes all the relevant non-dimensional parameters controlling the process, and (ii) contrary to commonly employed empirical formulae, is free from scale issues. Theoretical predictions agree very well with experimental data, shed light on unresolved issues on the physics of the problem, and clarify the effects of various dimensionless parameters controlling the scouring process.
hydraulics, sediment transport, turbulence theory
309-324
Manes, Costantino
7d9d5123-4d1b-4760-beff-d82fe0bd0acf
Brocchini, Maurizio
9b4496d3-808a-425c-9525-7d511ac34127
September 2015
Manes, Costantino
7d9d5123-4d1b-4760-beff-d82fe0bd0acf
Brocchini, Maurizio
9b4496d3-808a-425c-9525-7d511ac34127
Manes, Costantino and Brocchini, Maurizio
(2015)
Local scour around structures and the phenomenology of turbulence.
Journal of Fluid Mechanics, 779, .
(doi:10.1017/jfm.2015.389).
Abstract
The scaling of the scour depth of equilibrium at the base of a solid cylinder immersed within an erodible granular bed and impinged by a turbulent shear flow is investigated here, for the first time, by means of the phenomenological theory of turbulence. The proposed theory allows the derivation of a predictive formula that (i) includes all the relevant non-dimensional parameters controlling the process, and (ii) contrary to commonly employed empirical formulae, is free from scale issues. Theoretical predictions agree very well with experimental data, shed light on unresolved issues on the physics of the problem, and clarify the effects of various dimensionless parameters controlling the scouring process.
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More information
Accepted/In Press date: 3 July 2015
e-pub ahead of print date: 14 August 2015
Published date: September 2015
Keywords:
hydraulics, sediment transport, turbulence theory
Organisations:
Water & Environmental Engineering Group
Identifiers
Local EPrints ID: 380988
URI: http://eprints.soton.ac.uk/id/eprint/380988
ISSN: 0022-1120
PURE UUID: 8ad43353-09db-4f97-bcda-3b65f9d3a3d1
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Date deposited: 22 Sep 2015 10:25
Last modified: 14 Mar 2024 21:08
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Contributors
Author:
Costantino Manes
Author:
Maurizio Brocchini
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