Particle tracking modeling of sediment-laden jets
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...
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sg-ntu-dr.10356-1067392019-12-06T22:17:20Z Particle tracking modeling of sediment-laden jets Chan, S. N. Lee, J. H. W. School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Construction technology 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. Published version 2015-02-18T03:26:30Z 2019-12-06T22:17:20Z 2015-02-18T03:26:30Z 2019-12-06T22:17:20Z 2014 2014 Journal Article Chan, S. N., & Lee, J. H. W. (2014). Particle tracking modeling of sediment-laden jets. Advances in geosciences, 39, 107-114. 1680-7340 https://hdl.handle.net/10356/106739 http://hdl.handle.net/10220/25075 http://dx.doi.org/10.5194/adgeo-39-107-2014 en Advances in geosciences © 2014 Author(s) (Published by Copernicus Publications on behalf of the European Geosciences Union (EGU)). This work is distributed under the Creative Commons Attribution 3.0 License. 8 p. application/pdf |
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DRNTU::Engineering::Civil engineering::Construction technology Chan, S. N. Lee, J. H. W. Particle tracking modeling of sediment-laden jets |
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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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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Chan, S. N. Lee, J. H. W. |
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Article |
author |
Chan, S. N. Lee, J. H. W. |
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Chan, S. N. |
title |
Particle tracking modeling of sediment-laden jets |
title_short |
Particle tracking modeling of sediment-laden jets |
title_full |
Particle tracking modeling of sediment-laden jets |
title_fullStr |
Particle tracking modeling of sediment-laden jets |
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Particle tracking modeling of sediment-laden jets |
title_sort |
particle tracking modeling of sediment-laden jets |
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2015 |
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https://hdl.handle.net/10356/106739 http://hdl.handle.net/10220/25075 http://dx.doi.org/10.5194/adgeo-39-107-2014 |
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