Experimental study on bottom shear stress under sawtooth waves

Hitoshi Tanaka; Hiroto Yamaji

doi:10.1142/9789812703040_0015

Experimental study on bottom shear stress under sawtooth waves

Suntoyo, Hitoshi Tanaka, Hiroto Yamaji

Tohoku University

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

Abstract

The bottom shear stress estimation under sawtooth wave is the crucial step, which is required as an input to most of sediment transport model under rapid acceleration and the contribution of pre-suspended sediment to the onshore sediment transport in swash zone. Suntoyo et al. (2002) had shown that the bottom shear stress variation under sawtooth wave was dependent on high acceleration and deceleration. However, investigation of a more reliable calculation method to estimate the time-variation bottom shear stress under sawtooth wave over rough bed has not deeply done yet. In the present study, turbulent bottom boundary layer flow under sawtooth wave is investigated with the experiments in oscillating wind tunnel over rough bed by laser Doppler velocimeter (LDV) to measure velocity distribution. Bottom shear stress will be estimated by fitting the logarithmic velocity profile to the measured velocity. Furthermore, the experimental results will be examined with the bottom shear stress calculation method based on both the consideration of the friction coefficient for sinusoidal wave motion and that of the acceleration effect for sawtooth wave.

Original language	English
Title of host publication	Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference
Editors	Yoshimi Goda, Kazuo Nadaolta, Wataru Kiolta
Publisher	[publishername] World Scientific
ISBN (Print)	9789812703040
DOIs	https://doi.org/10.1142/9789812703040_0015
Publication status	Published - 2004
Externally published	Yes
Event	2nd International Conference on Asian and Pacific Coasts, APAC (WITH CD-ROM) 2003 - Chiba, Japan Duration: 29 Feb 2004 → 4 Mar 2004

Publication series

Name	Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference

Conference

Conference	2nd International Conference on Asian and Pacific Coasts, APAC (WITH CD-ROM) 2003
Country/Territory	Japan
City	Chiba
Period	29/02/04 → 4/03/04

Keywords

Bottom shear stress
Rough bed
Sawtooth wave
Sediment transport
Turbulent bottom boundary layer

Access to Document

10.1142/9789812703040_0015

Cite this

Suntoyo, Tanaka, H., & Yamaji, H. (2004). Experimental study on bottom shear stress under sawtooth waves. In Y. Goda, K. Nadaolta, & W. Kiolta (Eds.), Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference (Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference). [publishername] World Scientific. https://doi.org/10.1142/9789812703040_0015

Suntoyo ; Tanaka, Hitoshi ; Yamaji, Hiroto. / Experimental study on bottom shear stress under sawtooth waves. Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference. editor / Yoshimi Goda ; Kazuo Nadaolta ; Wataru Kiolta. [publishername] World Scientific, 2004. (Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference).

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title = "Experimental study on bottom shear stress under sawtooth waves",

abstract = "The bottom shear stress estimation under sawtooth wave is the crucial step, which is required as an input to most of sediment transport model under rapid acceleration and the contribution of pre-suspended sediment to the onshore sediment transport in swash zone. Suntoyo et al. (2002) had shown that the bottom shear stress variation under sawtooth wave was dependent on high acceleration and deceleration. However, investigation of a more reliable calculation method to estimate the time-variation bottom shear stress under sawtooth wave over rough bed has not deeply done yet. In the present study, turbulent bottom boundary layer flow under sawtooth wave is investigated with the experiments in oscillating wind tunnel over rough bed by laser Doppler velocimeter (LDV) to measure velocity distribution. Bottom shear stress will be estimated by fitting the logarithmic velocity profile to the measured velocity. Furthermore, the experimental results will be examined with the bottom shear stress calculation method based on both the consideration of the friction coefficient for sinusoidal wave motion and that of the acceleration effect for sawtooth wave.",

keywords = "Bottom shear stress, Rough bed, Sawtooth wave, Sediment transport, Turbulent bottom boundary layer",

author = "Suntoyo and Hitoshi Tanaka and Hiroto Yamaji",

note = "Publisher Copyright: {\textcopyright} 2004, World Scientific. All rights reserved.; 2nd International Conference on Asian and Pacific Coasts, APAC (WITH CD-ROM) 2003 ; Conference date: 29-02-2004 Through 04-03-2004",

year = "2004",

doi = "10.1142/9789812703040_0015",

language = "English",

isbn = "9789812703040",

series = "Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference",

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}

Suntoyo, Tanaka, H & Yamaji, H 2004, Experimental study on bottom shear stress under sawtooth waves. in Y Goda, K Nadaolta & W Kiolta (eds), Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference. Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference, [publishername] World Scientific, 2nd International Conference on Asian and Pacific Coasts, APAC (WITH CD-ROM) 2003, Chiba, Japan, 29/02/04. https://doi.org/10.1142/9789812703040_0015

Experimental study on bottom shear stress under sawtooth waves. / Suntoyo; Tanaka, Hitoshi; Yamaji, Hiroto.
Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference. ed. / Yoshimi Goda; Kazuo Nadaolta; Wataru Kiolta. [publishername] World Scientific, 2004. (Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference).

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

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AU - Suntoyo,

AU - Tanaka, Hitoshi

AU - Yamaji, Hiroto

PY - 2004

Y1 - 2004

N2 - The bottom shear stress estimation under sawtooth wave is the crucial step, which is required as an input to most of sediment transport model under rapid acceleration and the contribution of pre-suspended sediment to the onshore sediment transport in swash zone. Suntoyo et al. (2002) had shown that the bottom shear stress variation under sawtooth wave was dependent on high acceleration and deceleration. However, investigation of a more reliable calculation method to estimate the time-variation bottom shear stress under sawtooth wave over rough bed has not deeply done yet. In the present study, turbulent bottom boundary layer flow under sawtooth wave is investigated with the experiments in oscillating wind tunnel over rough bed by laser Doppler velocimeter (LDV) to measure velocity distribution. Bottom shear stress will be estimated by fitting the logarithmic velocity profile to the measured velocity. Furthermore, the experimental results will be examined with the bottom shear stress calculation method based on both the consideration of the friction coefficient for sinusoidal wave motion and that of the acceleration effect for sawtooth wave.

AB - The bottom shear stress estimation under sawtooth wave is the crucial step, which is required as an input to most of sediment transport model under rapid acceleration and the contribution of pre-suspended sediment to the onshore sediment transport in swash zone. Suntoyo et al. (2002) had shown that the bottom shear stress variation under sawtooth wave was dependent on high acceleration and deceleration. However, investigation of a more reliable calculation method to estimate the time-variation bottom shear stress under sawtooth wave over rough bed has not deeply done yet. In the present study, turbulent bottom boundary layer flow under sawtooth wave is investigated with the experiments in oscillating wind tunnel over rough bed by laser Doppler velocimeter (LDV) to measure velocity distribution. Bottom shear stress will be estimated by fitting the logarithmic velocity profile to the measured velocity. Furthermore, the experimental results will be examined with the bottom shear stress calculation method based on both the consideration of the friction coefficient for sinusoidal wave motion and that of the acceleration effect for sawtooth wave.

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KW - Rough bed

KW - Sawtooth wave

KW - Sediment transport

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T3 - Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference

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PB - [publishername] World Scientific

T2 - 2nd International Conference on Asian and Pacific Coasts, APAC (WITH CD-ROM) 2003

Y2 - 29 February 2004 through 4 March 2004

ER -

Suntoyo, Tanaka H, Yamaji H. Experimental study on bottom shear stress under sawtooth waves. In Goda Y, Nadaolta K, Kiolta W, editors, Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference. [publishername] World Scientific. 2004. (Asian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference). doi: 10.1142/9789812703040_0015

Experimental study on bottom shear stress under sawtooth waves

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Keywords

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