Numerical simulation of heterogeneous mixing in meandering channels

Il Won Seo; In Hwan Park; Sung Won Park; Jae Hyun Shin

Numerical simulation of heterogeneous mixing in meandering channels

Il Won Seo, In Hwan Park, Sung Won Park, Jae Hyun Shin

Dept. of Civil Engineering

Seoul National University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

A two-dimensional advection-dispersion model was applied to investigate the effect of heterogeneous dispersion tensor on the tracer mixing in meandering channels. Two different dispersion tensors were incorporated into the numerical model. First type was calculated by integrating the vertical deviations of stream-wise and span-wise velocities, while the second type was just based on the depth-averaged velocities. Measured dispersion tensor from experimental data showed that the first-type dispersion tensor varies in both longitudinal and transverse directions in laboratory meandering channel whereas the second type varies mainly in the longitudinal direction. Furthermore, simulation results by 2D model revealed that concentration contours computed with first type dispersion tensor show span-wise tracer mixing more specifically than second type dispersion tensor. This means that first-type dispersion tensor adequately represents the effect of secondary currents developing alternatively in meandering channels.

Original language	English
Title of host publication	34th IAHR Congress 2011 - Balance and Uncertainty
Subtitle of host publication	Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering
Publisher	International Association for Hydro-Environment Engineering and Research (IAHR)
Pages	3263-3270
Number of pages	8
ISBN (Electronic)	9780858258686
State	Published - 2011
Event	34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering - Brisbane, Australia Duration: 26 Jun 2011 → 1 Jul 2011

Publication series

Name	34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering

Conference

Conference	34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering
Country/Territory	Australia
City	Brisbane
Period	26/06/11 → 1/07/11

Keywords

2-D water quality modeling
Dispersion tensor
Heterogeneous mixing
Meandering channel
Primary flow
Secondary current

Cite this

Seo, I. W., Park, I. H., Park, S. W., & Shin, J. H. (2011). Numerical simulation of heterogeneous mixing in meandering channels. In 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering (pp. 3263-3270). (34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering). International Association for Hydro-Environment Engineering and Research (IAHR).

Seo, Il Won ; Park, In Hwan ; Park, Sung Won et al. / Numerical simulation of heterogeneous mixing in meandering channels. 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering. International Association for Hydro-Environment Engineering and Research (IAHR), 2011. pp. 3263-3270 (34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering).

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title = "Numerical simulation of heterogeneous mixing in meandering channels",

abstract = "A two-dimensional advection-dispersion model was applied to investigate the effect of heterogeneous dispersion tensor on the tracer mixing in meandering channels. Two different dispersion tensors were incorporated into the numerical model. First type was calculated by integrating the vertical deviations of stream-wise and span-wise velocities, while the second type was just based on the depth-averaged velocities. Measured dispersion tensor from experimental data showed that the first-type dispersion tensor varies in both longitudinal and transverse directions in laboratory meandering channel whereas the second type varies mainly in the longitudinal direction. Furthermore, simulation results by 2D model revealed that concentration contours computed with first type dispersion tensor show span-wise tracer mixing more specifically than second type dispersion tensor. This means that first-type dispersion tensor adequately represents the effect of secondary currents developing alternatively in meandering channels.",

keywords = "2-D water quality modeling, Dispersion tensor, Heterogeneous mixing, Meandering channel, Primary flow, Secondary current",

author = "Seo, \{Il Won\} and Park, \{In Hwan\} and Park, \{Sung Won\} and Shin, \{Jae Hyun\}",

note = "Publisher Copyright: {\textcopyright} 34th IAHR Congress 2011. All rights reserved.; 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering ; Conference date: 26-06-2011 Through 01-07-2011",

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Seo, IW, Park, IH, Park, SW & Shin, JH 2011, Numerical simulation of heterogeneous mixing in meandering channels. in 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering. 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering, International Association for Hydro-Environment Engineering and Research (IAHR), pp. 3263-3270, 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering, Brisbane, Australia, 26/06/11.

Numerical simulation of heterogeneous mixing in meandering channels. / Seo, Il Won; Park, In Hwan; Park, Sung Won et al.
34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering. International Association for Hydro-Environment Engineering and Research (IAHR), 2011. p. 3263-3270 (34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Numerical simulation of heterogeneous mixing in meandering channels

AU - Seo, Il Won

AU - Park, In Hwan

AU - Park, Sung Won

AU - Shin, Jae Hyun

PY - 2011

Y1 - 2011

N2 - A two-dimensional advection-dispersion model was applied to investigate the effect of heterogeneous dispersion tensor on the tracer mixing in meandering channels. Two different dispersion tensors were incorporated into the numerical model. First type was calculated by integrating the vertical deviations of stream-wise and span-wise velocities, while the second type was just based on the depth-averaged velocities. Measured dispersion tensor from experimental data showed that the first-type dispersion tensor varies in both longitudinal and transverse directions in laboratory meandering channel whereas the second type varies mainly in the longitudinal direction. Furthermore, simulation results by 2D model revealed that concentration contours computed with first type dispersion tensor show span-wise tracer mixing more specifically than second type dispersion tensor. This means that first-type dispersion tensor adequately represents the effect of secondary currents developing alternatively in meandering channels.

AB - A two-dimensional advection-dispersion model was applied to investigate the effect of heterogeneous dispersion tensor on the tracer mixing in meandering channels. Two different dispersion tensors were incorporated into the numerical model. First type was calculated by integrating the vertical deviations of stream-wise and span-wise velocities, while the second type was just based on the depth-averaged velocities. Measured dispersion tensor from experimental data showed that the first-type dispersion tensor varies in both longitudinal and transverse directions in laboratory meandering channel whereas the second type varies mainly in the longitudinal direction. Furthermore, simulation results by 2D model revealed that concentration contours computed with first type dispersion tensor show span-wise tracer mixing more specifically than second type dispersion tensor. This means that first-type dispersion tensor adequately represents the effect of secondary currents developing alternatively in meandering channels.

KW - 2-D water quality modeling

KW - Dispersion tensor

KW - Heterogeneous mixing

KW - Meandering channel

KW - Primary flow

KW - Secondary current

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BT - 34th IAHR Congress 2011 - Balance and Uncertainty

PB - International Association for Hydro-Environment Engineering and Research (IAHR)

T2 - 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering

Y2 - 26 June 2011 through 1 July 2011

ER -

Seo IW, Park IH, Park SW, Shin JH. Numerical simulation of heterogeneous mixing in meandering channels. In 34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering. International Association for Hydro-Environment Engineering and Research (IAHR). 2011. p. 3263-3270. (34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering).

Numerical simulation of heterogeneous mixing in meandering channels

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