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| Titel |
Particle tracking modeling of sediment-laden jets |
| VerfasserIn |
S. N. Chan, J. H. W. Lee |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: Proceedings of river, coastal and estuarine morphodynamics ; Nr. 39 (2014-06-27), S.107-114 |
| Datensatznummer |
250121312
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| Publikation (Nr.) |
 copernicus.org/adgeo-39-107-2014.pdf |
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| Zusammenfassung |
| This paper presents a general model to predict the particulate
transport and deposition from a sediment-laden horizontal momentum jet. A
three-dimensional (3-D) stochastic particle tracking model is developed based
on the governing equation of particle motion. The turbulent velocity
fluctuations are modelled by a Lagrangian velocity autocorrelation function
that captures the trapping of sediment particles in turbulent eddies, which
result in the reduction of settling velocity. Using classical solutions of
mean jet velocity, and turbulent fluctuation and dissipation rate profiles
derived from computational fluid dynamics calculations of a pure jet, the
equation of motion is solved numerically to track the particle movement in
the jet flow field. The 3-D particle tracking model predictions of sediment
deposition and concentration profiles are in excellent agreement with
measured data. The computationally demanding Basset history force is shown to
be negligible in the prediction of bottom deposition profiles. |
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