Mixing of coflowing jets in rivers

B. S. Pani; J. H.W. Lee; A. C.H. Lai

doi:10.1007/978-3-540-89465-0_114

Mixing of coflowing jets in rivers

B. S. Pani
, J. H.W. Lee
, A. C.H. Lai

Research output: Chapter in Book/Conference Proceeding/Report › Conference Paper published in a book › peer-review

Abstract

Domestic and industrial wastewater effluents are often discharged into rivers after some treatment. An effective way of rapidly reducing effluent concentrations to acceptable levels within a mixing zone is to discharge the effluent in the form of multiple jets into a coflowing river flow at some distance from the riverbank. An accurate and efficient predictive model of multiple coflowing jets is required for impact and risk assessment of environmental discharges into rivers. In the present study, a new semi-analytical model for multiple coflowing jets is developed using the method of superposition based on Reichardt s hypothesis. Jet excess momentum fluxes are hypothesized to be Gaussian and additive, which is supported by both theory and experimental observations. The predicted jet mixing characteristics of multiple coflowing jets from the present model compares favorably with basic experimental data. The present model is able to predict the entire concentration field, and thus mixing zone, downstream of an effluent discharge, and has potential application in river discharges.

Original language	English
Title of host publication	Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS
Publisher	Springer Berlin Heidelberg
Pages	651-655
Number of pages	5
ISBN (Print)	9783540894643
DOIs	https://doi.org/10.1007/978-3-540-89465-0_114
Publication status	Published - 2009
Externally published	Yes
Event	16th Congress of Asia and Pacific Division of International Association of Hydraulic Engineering and Research, APD 2008 and the 3rd IAHR International Symposium on Hydraulic Structures, ISHS 2008 - Nanjing, China Duration: 20 Oct 2008 → 23 Oct 2008

Publication series

Name	Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS

Conference

Conference	16th Congress of Asia and Pacific Division of International Association of Hydraulic Engineering and Research, APD 2008 and the 3rd IAHR International Symposium on Hydraulic Structures, ISHS 2008
Country/Territory	China
City	Nanjing
Period	20/10/08 → 23/10/08

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation
SDG 9 Industry, Innovation, and Infrastructure
SDG 11 Sustainable Cities and Communities

Keywords

Coflowing jets
Jet dilution
Multiple jets
Reichardt s hypothesis
Superposition method

Access to Document

10.1007/978-3-540-89465-0_114

Cite this

Pani, B. S., Lee, J. H. W., & Lai, A. C. H. (2009). Mixing of coflowing jets in rivers. In Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS (pp. 651-655). (Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-540-89465-0_114

Pani, B. S. ; Lee, J. H.W. ; Lai, A. C.H. / Mixing of coflowing jets in rivers. Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS. Springer Berlin Heidelberg, 2009. pp. 651-655 (Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS).

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title = "Mixing of coflowing jets in rivers",

abstract = "Domestic and industrial wastewater effluents are often discharged into rivers after some treatment. An effective way of rapidly reducing effluent concentrations to acceptable levels within a mixing zone is to discharge the effluent in the form of multiple jets into a coflowing river flow at some distance from the riverbank. An accurate and efficient predictive model of multiple coflowing jets is required for impact and risk assessment of environmental discharges into rivers. In the present study, a new semi-analytical model for multiple coflowing jets is developed using the method of superposition based on Reichardt s hypothesis. Jet excess momentum fluxes are hypothesized to be Gaussian and additive, which is supported by both theory and experimental observations. The predicted jet mixing characteristics of multiple coflowing jets from the present model compares favorably with basic experimental data. The present model is able to predict the entire concentration field, and thus mixing zone, downstream of an effluent discharge, and has potential application in river discharges.",

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author = "Pani, \{B. S.\} and Lee, \{J. H.W.\} and Lai, \{A. C.H.\}",

year = "2009",

doi = "10.1007/978-3-540-89465-0\_114",

language = "English",

isbn = "9783540894643",

series = "Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS",

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booktitle = "Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS",

note = "16th Congress of Asia and Pacific Division of International Association of Hydraulic Engineering and Research, APD 2008 and the 3rd IAHR International Symposium on Hydraulic Structures, ISHS 2008 ; Conference date: 20-10-2008 Through 23-10-2008",

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Pani, BS, Lee, JHW & Lai, ACH 2009, Mixing of coflowing jets in rivers. in Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS. Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS, Springer Berlin Heidelberg, pp. 651-655, 16th Congress of Asia and Pacific Division of International Association of Hydraulic Engineering and Research, APD 2008 and the 3rd IAHR International Symposium on Hydraulic Structures, ISHS 2008, Nanjing, China, 20/10/08. https://doi.org/10.1007/978-3-540-89465-0_114

Mixing of coflowing jets in rivers. / Pani, B. S.; Lee, J. H.W.; Lai, A. C.H.
Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS. Springer Berlin Heidelberg, 2009. p. 651-655 (Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS).

Research output: Chapter in Book/Conference Proceeding/Report › Conference Paper published in a book › peer-review

TY - GEN

T1 - Mixing of coflowing jets in rivers

AU - Pani, B. S.

AU - Lee, J. H.W.

AU - Lai, A. C.H.

PY - 2009

Y1 - 2009

N2 - Domestic and industrial wastewater effluents are often discharged into rivers after some treatment. An effective way of rapidly reducing effluent concentrations to acceptable levels within a mixing zone is to discharge the effluent in the form of multiple jets into a coflowing river flow at some distance from the riverbank. An accurate and efficient predictive model of multiple coflowing jets is required for impact and risk assessment of environmental discharges into rivers. In the present study, a new semi-analytical model for multiple coflowing jets is developed using the method of superposition based on Reichardt s hypothesis. Jet excess momentum fluxes are hypothesized to be Gaussian and additive, which is supported by both theory and experimental observations. The predicted jet mixing characteristics of multiple coflowing jets from the present model compares favorably with basic experimental data. The present model is able to predict the entire concentration field, and thus mixing zone, downstream of an effluent discharge, and has potential application in river discharges.

AB - Domestic and industrial wastewater effluents are often discharged into rivers after some treatment. An effective way of rapidly reducing effluent concentrations to acceptable levels within a mixing zone is to discharge the effluent in the form of multiple jets into a coflowing river flow at some distance from the riverbank. An accurate and efficient predictive model of multiple coflowing jets is required for impact and risk assessment of environmental discharges into rivers. In the present study, a new semi-analytical model for multiple coflowing jets is developed using the method of superposition based on Reichardt s hypothesis. Jet excess momentum fluxes are hypothesized to be Gaussian and additive, which is supported by both theory and experimental observations. The predicted jet mixing characteristics of multiple coflowing jets from the present model compares favorably with basic experimental data. The present model is able to predict the entire concentration field, and thus mixing zone, downstream of an effluent discharge, and has potential application in river discharges.

KW - Coflowing jets

KW - Jet dilution

KW - Multiple jets

KW - Reichardt s hypothesis

KW - Superposition method

UR - https://www.scopus.com/pages/publications/84903468491

U2 - 10.1007/978-3-540-89465-0_114

DO - 10.1007/978-3-540-89465-0_114

M3 - Conference Paper published in a book

AN - SCOPUS:84903468491

SN - 9783540894643

T3 - Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS

SP - 651

EP - 655

BT - Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS

PB - Springer Berlin Heidelberg

T2 - 16th Congress of Asia and Pacific Division of International Association of Hydraulic Engineering and Research, APD 2008 and the 3rd IAHR International Symposium on Hydraulic Structures, ISHS 2008

Y2 - 20 October 2008 through 23 October 2008

ER -

Pani BS, Lee JHW, Lai ACH. Mixing of coflowing jets in rivers. In Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS. Springer Berlin Heidelberg. 2009. p. 651-655. (Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS). doi: 10.1007/978-3-540-89465-0_114

Mixing of coflowing jets in rivers

Abstract

Publication series

Conference

UN SDGs

Keywords

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