Mean and turbulence strutures of open-channel flows with submerged vegetation

Wonjun Yang, Sung-Uk Choi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, the mean flow and turbulent structures of the open-channel flows with the submerged vegetation was explored. For this, laboratory flume experiments are conducted with model vegetation without foliage. Wooden dowel is used for rigid vegetation, and polyethylene film is used for flexible vegetation. Other properties of model vegetation are made the same. Mean and fluctuation velocities are measured using the laser Doppler anemometer. From the measured data, the vertical profiles of mean velocity, turbulent intensity, Reynolds shear stress are obtained. The general profiles for mean velocity and turbulent intensity is suggested, and the profiles of Reynolds shear stress were investigated. The impact of stem flexibility was also investigated. It was shown that mean velocity and Reynolds shear stress can hardly distinguished from that with rigid vegetation. However, turbulent intensity profiles were affected by stem flexibility.

Original languageEnglish
Title of host publicationAdvances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS
PublisherSpringer-Verlag Berlin Heidelberg
Pages429-434
Number of pages6
ISBN (Print)9783540894643
Publication statusPublished - 2009 Jan 1
Event16th 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: 2008 Oct 202008 Oct 23

Publication series

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

Other

Other16th 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
CountryChina
CityNanjing
Period08/10/2008/10/23

Fingerprint

Open channel flow
Turbulence
Shear stress
Anemometers
Polyethylenes
Lasers

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

Cite this

Yang, W., & Choi, S-U. (2009). Mean and turbulence strutures of open-channel flows with submerged vegetation. In Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS (pp. 429-434). (Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS). Springer-Verlag Berlin Heidelberg.
Yang, Wonjun ; Choi, Sung-Uk. / Mean and turbulence strutures of open-channel flows with submerged vegetation. Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS. Springer-Verlag Berlin Heidelberg, 2009. pp. 429-434 (Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS).
@inproceedings{f58a1a9bf6594f2d8008f38c66b9bded,
title = "Mean and turbulence strutures of open-channel flows with submerged vegetation",
abstract = "In this study, the mean flow and turbulent structures of the open-channel flows with the submerged vegetation was explored. For this, laboratory flume experiments are conducted with model vegetation without foliage. Wooden dowel is used for rigid vegetation, and polyethylene film is used for flexible vegetation. Other properties of model vegetation are made the same. Mean and fluctuation velocities are measured using the laser Doppler anemometer. From the measured data, the vertical profiles of mean velocity, turbulent intensity, Reynolds shear stress are obtained. The general profiles for mean velocity and turbulent intensity is suggested, and the profiles of Reynolds shear stress were investigated. The impact of stem flexibility was also investigated. It was shown that mean velocity and Reynolds shear stress can hardly distinguished from that with rigid vegetation. However, turbulent intensity profiles were affected by stem flexibility.",
author = "Wonjun Yang and Sung-Uk Choi",
year = "2009",
month = "1",
day = "1",
language = "English",
isbn = "9783540894643",
series = "Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS",
publisher = "Springer-Verlag Berlin Heidelberg",
pages = "429--434",
booktitle = "Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS",

}

Yang, W & Choi, S-U 2009, Mean and turbulence strutures of open-channel flows with submerged vegetation. 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-Verlag Berlin Heidelberg, pp. 429-434, 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, 08/10/20.

Mean and turbulence strutures of open-channel flows with submerged vegetation. / Yang, Wonjun; Choi, Sung-Uk.

Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS. Springer-Verlag Berlin Heidelberg, 2009. p. 429-434 (Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Mean and turbulence strutures of open-channel flows with submerged vegetation

AU - Yang, Wonjun

AU - Choi, Sung-Uk

PY - 2009/1/1

Y1 - 2009/1/1

N2 - In this study, the mean flow and turbulent structures of the open-channel flows with the submerged vegetation was explored. For this, laboratory flume experiments are conducted with model vegetation without foliage. Wooden dowel is used for rigid vegetation, and polyethylene film is used for flexible vegetation. Other properties of model vegetation are made the same. Mean and fluctuation velocities are measured using the laser Doppler anemometer. From the measured data, the vertical profiles of mean velocity, turbulent intensity, Reynolds shear stress are obtained. The general profiles for mean velocity and turbulent intensity is suggested, and the profiles of Reynolds shear stress were investigated. The impact of stem flexibility was also investigated. It was shown that mean velocity and Reynolds shear stress can hardly distinguished from that with rigid vegetation. However, turbulent intensity profiles were affected by stem flexibility.

AB - In this study, the mean flow and turbulent structures of the open-channel flows with the submerged vegetation was explored. For this, laboratory flume experiments are conducted with model vegetation without foliage. Wooden dowel is used for rigid vegetation, and polyethylene film is used for flexible vegetation. Other properties of model vegetation are made the same. Mean and fluctuation velocities are measured using the laser Doppler anemometer. From the measured data, the vertical profiles of mean velocity, turbulent intensity, Reynolds shear stress are obtained. The general profiles for mean velocity and turbulent intensity is suggested, and the profiles of Reynolds shear stress were investigated. The impact of stem flexibility was also investigated. It was shown that mean velocity and Reynolds shear stress can hardly distinguished from that with rigid vegetation. However, turbulent intensity profiles were affected by stem flexibility.

UR - http://www.scopus.com/inward/record.url?scp=84903474190&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84903474190&partnerID=8YFLogxK

M3 - Conference contribution

SN - 9783540894643

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

SP - 429

EP - 434

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

PB - Springer-Verlag Berlin Heidelberg

ER -

Yang W, Choi S-U. Mean and turbulence strutures of open-channel flows with submerged vegetation. In Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS. Springer-Verlag Berlin Heidelberg. 2009. p. 429-434. (Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS).