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Three-dimensional numerical simulation of solute transport in a meandering self-formed river channel
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Wilson, C. A. M. E., Guymer, I., Boxall, J. B. and Olsen, N. R. B. (2007) Three-dimensional numerical simulation of solute transport in a meandering self-formed river channel. Journal of Hydraulic Research, Vol.45 (No.5). pp. 610-616. doi:10.1080/00221686.2007.9521797 ISSN 0022-1686.
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Official URL: http://dx.doi.org/10.1080/00221686.2007.9521797
Abstract
A three-dimensional (3-D) numerical model with standard k-epsilon,turbulence closure has been applied to model the transport and mixing of solute in a larae-scale laboratory channel. The channel is meandering with self-formed cross-sectional shape. Simulation accuracy was evaluated through comparison of computed and measured temporal concentration curves downstream of a pulse injection from a transverse line source. This study shows that the transport and mixing of solute in a meandering channel with a physically realistic bathymetry can be simulated accurately with a 3-D numerical model using k-epsilon turbulence closure. The prediction accuracy of the temporal concentration curves using different time steps, numerical schemes and Schmidt numbers are presented. The performance was evaluated in terms of a goodness of fit, computed peak concentration and gradients of the rising and falling limbs. The second order upwind scheme for the advective term in the solution of the advection-diffusion equation was found to give a considerably better prediction of the temporal concentration curve than the power law scheme. A value of unity for the turbulent Schmidt number results in a slightly early arrival time of the peak in tracer concentration, reducing the value of Schmidt number to 0.5 was found to result in a more accurate prediction.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TC Hydraulic engineering. Ocean engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Journal or Publication Title: | Journal of Hydraulic Research | ||||
Publisher: | Taylor & Francis Ltd. | ||||
ISSN: | 0022-1686 | ||||
Official Date: | 2007 | ||||
Dates: |
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Volume: | Vol.45 | ||||
Number: | No.5 | ||||
Number of Pages: | 7 | ||||
Page Range: | pp. 610-616 | ||||
DOI: | 10.1080/00221686.2007.9521797 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | Engineering and Physical Science Research Council (EPSRC) | ||||
Grant number: | GR/A11239/01 |
Data sourced from Thomson Reuters' Web of Knowledge
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