Investigation of scour around two side-by-side piles with different spacing ratios in live-bed

Amir Bordbar; Soroosh Sharifi; Hassan Hemida

doi:10.1007/978-981-16-7735-9_33

Investigation of scour around two side-by-side piles with different spacing ratios in live-bed

Amir Bordbar^*, Soroosh Sharifi, Hassan Hemida

^*Corresponding author for this work

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

26 Downloads (Pure)

Abstract

In this study, a developed model is employed for numerically investigating scour around a group of two identical side-by-side piles. The model benefits from a coupled approach between a hydrodynamic and a morphodynamic model which is successfully validated for predicting scour around a single circular pile. The hydrodynamic model solves unsteady Reynolds-Averaged Navier-Stokes (RANS) equations in combination with the k-ω-SST turbulence closure model. The morphodynamic model entails bedload and suspended load sediment transport models for non-cohesive sand. The morphological evolution of the bed due to the sediment transport fluxes is expressed by a means of a mass-balance equation. The model is run for two side-by-side piles with three different spacing ratios G/D = 1, 2, and 3, where G represents the distance between the piles and D is the pile diameter, under steady-current flow and live-bed conditions. The results of the investigation reveal an inverse correlation between the spacing ratio and the scour hole depth adjacent to piles. The results are generalized and an equation is obtained for equilibrium scour hole depth as a function of the spacing ratio.

Original language	English
Title of host publication	Proceedings of the 2nd Vietnam Symposium on Advances in Offshore Engineering
Subtitle of host publication	Sustainable Energy and Marine Planning
Editors	Dat Vu Huynh, Anh Minh Tang, Dinh Hong Doan, Phil Watson
Publisher	Springer
Pages	302-309
Number of pages	8
Edition	1
ISBN (Electronic)	9789811677359
ISBN (Print)	9789811677342, 9789811677373
DOIs	https://doi.org/10.1007/978-981-16-7735-9_33
Publication status	Published - 1 Jan 2022
Event	2nd Vietnam Symposium on Advances in Offshore Engineering, VSOE 2021 - Ho Chi Minh City, Viet Nam Duration: 1 Nov 2021 → 3 Nov 2021

Publication series

Name	Lecture Notes in Civil Engineering
Volume	208
ISSN (Print)	2366-2557
ISSN (Electronic)	2366-2565

Conference

Conference	2nd Vietnam Symposium on Advances in Offshore Engineering, VSOE 2021
Country/Territory	Viet Nam
City	Ho Chi Minh City
Period	1/11/21 → 3/11/21

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

Keywords

CFD
Scour
Sediment transport
Side-by-side piles

ASJC Scopus subject areas

Civil and Structural Engineering

Access to Document

10.1007/978-981-16-7735-9_33

BordbarA2022Investigation
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Cite this

Bordbar, A., Sharifi, S., & Hemida, H. (2022). Investigation of scour around two side-by-side piles with different spacing ratios in live-bed. In D. V. Huynh, A. M. Tang, D. H. Doan, & P. Watson (Eds.), Proceedings of the 2nd Vietnam Symposium on Advances in Offshore Engineering: Sustainable Energy and Marine Planning (1 ed., pp. 302-309). (Lecture Notes in Civil Engineering; Vol. 208). Springer. https://doi.org/10.1007/978-981-16-7735-9_33

Bordbar, Amir ; Sharifi, Soroosh ; Hemida, Hassan. / Investigation of scour around two side-by-side piles with different spacing ratios in live-bed. Proceedings of the 2nd Vietnam Symposium on Advances in Offshore Engineering: Sustainable Energy and Marine Planning. editor / Dat Vu Huynh ; Anh Minh Tang ; Dinh Hong Doan ; Phil Watson. 1. ed. Springer, 2022. pp. 302-309 (Lecture Notes in Civil Engineering).

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abstract = "In this study, a developed model is employed for numerically investigating scour around a group of two identical side-by-side piles. The model benefits from a coupled approach between a hydrodynamic and a morphodynamic model which is successfully validated for predicting scour around a single circular pile. The hydrodynamic model solves unsteady Reynolds-Averaged Navier-Stokes (RANS) equations in combination with the k-ω-SST turbulence closure model. The morphodynamic model entails bedload and suspended load sediment transport models for non-cohesive sand. The morphological evolution of the bed due to the sediment transport fluxes is expressed by a means of a mass-balance equation. The model is run for two side-by-side piles with three different spacing ratios G/D = 1, 2, and 3, where G represents the distance between the piles and D is the pile diameter, under steady-current flow and live-bed conditions. The results of the investigation reveal an inverse correlation between the spacing ratio and the scour hole depth adjacent to piles. The results are generalized and an equation is obtained for equilibrium scour hole depth as a function of the spacing ratio.",

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Bordbar, A, Sharifi, S & Hemida, H 2022, Investigation of scour around two side-by-side piles with different spacing ratios in live-bed. in DV Huynh, AM Tang, DH Doan & P Watson (eds), Proceedings of the 2nd Vietnam Symposium on Advances in Offshore Engineering: Sustainable Energy and Marine Planning. 1 edn, Lecture Notes in Civil Engineering, vol. 208, Springer, pp. 302-309, 2nd Vietnam Symposium on Advances in Offshore Engineering, VSOE 2021, Ho Chi Minh City, Viet Nam, 1/11/21. https://doi.org/10.1007/978-981-16-7735-9_33

Investigation of scour around two side-by-side piles with different spacing ratios in live-bed. / Bordbar, Amir; Sharifi, Soroosh ; Hemida, Hassan.
Proceedings of the 2nd Vietnam Symposium on Advances in Offshore Engineering: Sustainable Energy and Marine Planning. ed. / Dat Vu Huynh; Anh Minh Tang; Dinh Hong Doan; Phil Watson. 1. ed. Springer, 2022. p. 302-309 (Lecture Notes in Civil Engineering; Vol. 208).

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

TY - GEN

T1 - Investigation of scour around two side-by-side piles with different spacing ratios in live-bed

AU - Bordbar, Amir

AU - Sharifi, Soroosh

AU - Hemida, Hassan

PY - 2022/1/1

Y1 - 2022/1/1

N2 - In this study, a developed model is employed for numerically investigating scour around a group of two identical side-by-side piles. The model benefits from a coupled approach between a hydrodynamic and a morphodynamic model which is successfully validated for predicting scour around a single circular pile. The hydrodynamic model solves unsteady Reynolds-Averaged Navier-Stokes (RANS) equations in combination with the k-ω-SST turbulence closure model. The morphodynamic model entails bedload and suspended load sediment transport models for non-cohesive sand. The morphological evolution of the bed due to the sediment transport fluxes is expressed by a means of a mass-balance equation. The model is run for two side-by-side piles with three different spacing ratios G/D = 1, 2, and 3, where G represents the distance between the piles and D is the pile diameter, under steady-current flow and live-bed conditions. The results of the investigation reveal an inverse correlation between the spacing ratio and the scour hole depth adjacent to piles. The results are generalized and an equation is obtained for equilibrium scour hole depth as a function of the spacing ratio.

AB - In this study, a developed model is employed for numerically investigating scour around a group of two identical side-by-side piles. The model benefits from a coupled approach between a hydrodynamic and a morphodynamic model which is successfully validated for predicting scour around a single circular pile. The hydrodynamic model solves unsteady Reynolds-Averaged Navier-Stokes (RANS) equations in combination with the k-ω-SST turbulence closure model. The morphodynamic model entails bedload and suspended load sediment transport models for non-cohesive sand. The morphological evolution of the bed due to the sediment transport fluxes is expressed by a means of a mass-balance equation. The model is run for two side-by-side piles with three different spacing ratios G/D = 1, 2, and 3, where G represents the distance between the piles and D is the pile diameter, under steady-current flow and live-bed conditions. The results of the investigation reveal an inverse correlation between the spacing ratio and the scour hole depth adjacent to piles. The results are generalized and an equation is obtained for equilibrium scour hole depth as a function of the spacing ratio.

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BT - Proceedings of the 2nd Vietnam Symposium on Advances in Offshore Engineering

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A2 - Tang, Anh Minh

A2 - Doan, Dinh Hong

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PB - Springer

T2 - 2nd Vietnam Symposium on Advances in Offshore Engineering, VSOE 2021

Y2 - 1 November 2021 through 3 November 2021

ER -

Bordbar A, Sharifi S , Hemida H. Investigation of scour around two side-by-side piles with different spacing ratios in live-bed. In Huynh DV, Tang AM, Doan DH, Watson P, editors, Proceedings of the 2nd Vietnam Symposium on Advances in Offshore Engineering: Sustainable Energy and Marine Planning. 1 ed. Springer. 2022. p. 302-309. (Lecture Notes in Civil Engineering). doi: 10.1007/978-981-16-7735-9_33

Investigation of scour around two side-by-side piles with different spacing ratios in live-bed

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this