TY - JOUR
T1 - Numerical Simulations of Mangrove-Inspired Sacrificial Pile Group for Scour Mitigation
AU - Li, Xiwei
AU - Tao, Julian
AU - van Paassen, Leon
N1 - Funding Information:
This research was funded by Southern Company. The authors gratefully acknowledge this support, and the opinions expressed in this paper are the authors alone and do not necessarily reflect the policies and views of Southern Company. This work was performed in part at the Georgia Tech Institute for Electronics and Nanotechnology, a member of the National Nanotechnology Coordinated Infrastructure, which is supported by the National Science Foundation (Grant ECCS-1542174).
Funding Information:
This work has been funded in part by the US Department of Transportation's University Transportation Center program, through the Pacific Northwe st Regional University Transportation Center (to IDA), US Department of Agriculture, Forest Service, Rocky Mountain Research Station (to PRR) and State of Washington Water Research Center (to IDA). We thank the sponsors for their support. We would like to thank Taiwo Akinleye, Andoni Alfaro Leránoz, Bob Brown, Holly Brown, Austin Durglo, Mathew Lesiecki, Saraf Promi, and Seth Tawiah for their assistance during field and laboratory work.
Funding Information:
Financial support of the Regents of the University of California, San Diego C(U SD) and Hell man Fellowship Foundation is greatly acknowledged. The opinions expressed in this paper are those of authors and not of UCSD or Hellman Foundation.
Funding Information:
This research is supported by the Singapor e Ministry of National Development and the 1DWLRQDO 5HVHDUFK )RXQGDWLRQ 3ULPH 0LQLVWHU¶V 2IILFH XQGHU WKH &LWLHV RI 7RPRUURZ &27 Research Programme (COT Award No. COT -V3 -2019 -1). Any opinions, findings, and conclusions or recommendations expressed in this paper are those of the author(s) and do not reflect the views of the Singapore Ministry of National Development and National Research )RXQGDWLRQ 3ULPH 0LQLVWHU¶V 2IILFH 6LQJDSRUH
Funding Information:
This study was carried out under the research contracts No.45/2018/HD -SCKH N funded by the Department of Science and Technology of Ho Chi Minh City and No.50/HD -DHBK CKH N&D A by Ho Chi Minh City University of Technology – Vietnam National University HCMC C(H MUT VNU -HCM) .
Funding Information:
This study was partially funded by the Illinois Center for Transportation (R27 -183 -HS, to AKH). We would like to thank Austin Pelletier and Drs Indranil Chowdhury, Richard Watts, and James Mueller for their input. We would also like to thank the technical review panel (TRP) for their support and guidance through this study.
Funding Information:
The work presented in this article has been supported by the US National Science Foundation under contract numbers 1659932 and 1944009.
Funding Information:
The financial support from NEUP is acknowledged .
Funding Information:
The authors would like to acknowledge the funding received from Engineering and Physical Sciences Research Council through the Global Challenges Research Fund to carry out the UHVHDUFK WLWOHG µ6XVWDLQDELOLW\ DQG UHVLOLHQFH RI WUDQVSRUWDWLRQ LQIUDVWUXFWXUH LQ $IULFDQ FRXQWULHV¶ grant number - EP/P029671/1.
Funding Information:
The author appreciates support from US Department of Energy Nuclear Energy University Program grant CFA-20-20093. The views in this paper are those of the author alone.
Funding Information:
The authors would like to acknowledge the Department of Science and Technology and Engineering Research Board, India, for the financial support through EMR/2016/001152.
Funding Information:
This material is based upon work supported by the U. S. Army Research Laboratory and the U. S. Army Research Office under contract numbers W911NF -16 -1 -0336, W911NF -17 -1 -0262 , W911NF -18 -1 -0068 , and W911NF -20-1 -0238 . The discussions and conclusions presented in this work reflect the opinions of the authors only.
Funding Information:
Authors would like to acknowledge the support from Central Instrumentation Facility, IIT Guwahati, for FESEM images.
Funding Information:
Financial support for this study was provided by the Electric Power Research Institute (EPRI).
Funding Information:
The authors would like to thank Dr. James Moore for providing valuable insight on the testing equipment and the Department of Civil and Environmental Engineering at Christian Brothers University for funding this research. Additionally, the authors would like to thank Lehman-Roberts for providing the RAS utilized in this project.
Funding Information:
This work has been supported by the National Science Foundation (NSF) Engineering Research Center for Bio-mediated and Bio-inspired Geotechnics program under the grant number ERC -1449501. Any opinions, findings an d conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect those of the NSF.
Funding Information:
Financial support provided by the Hellman Foundation and the Regents of the University of California San Diego is gratefully acknowledged. The opinions expressed in this paper are those oftheauthorsandnottheUCSDorHellmanFoundation.
Funding Information:
Financial support for this project is provided by the U.S. National Science Foundation (NSF), Arlington, VA under Grant No. CMMI - 1812550 . The opinions expressed in this paper are solely those of the authors and are not necessarily consistent with the poli cies or opinions of the NSF.
Funding Information:
The authors are grateful for the funding received from the Australian Research Council (ARC) and the industry partners, Manildra Group -Shoalhaven Starches, Glencore Pty Ltd and Douglas Partners Pty Ltd. The guidance and support from Dr Ana Heitor throughout the research is much appreciated. The efforts of UOW and UTS technical staff are kindly acknowledged.
Funding Information:
This research is supported by the funding from the National Natural Science Foundation of China (No.51978381).
Publisher Copyright:
© ASCE
PY - 2022
Y1 - 2022
N2 - Mangroves stabilize coastlines, partially through a porous ‘forest’ of trunks and aerial roots, which reportedly dissipate wave energy and reduce flow velocity. It is hypothesized that not only the vertical but also the horizontal components of the ‘forest’ contribute to the altering of flow field which mitigates scour. To test the hypothesis, the effect of a modified sacrificial pile group consisting of vertical mini-piles and (semi-) horizontal crossbars on the flow field around a downstream monopile is studied using computational fluid dynamics (CFD). The simulation results confirmed that the group of mini-piles significantly reduces both the horizontal and vertical velocity in front of the monopile as well as the flow-induced shear force at the bed. The presence of the crossbars reduces the horizontal velocities further, but more importantly, it helps significantly reduce or even reverse the downward flow at the front near the base of monopile. Such changes to the flow field are expected to reduce the strength of the horseshoe vortex and reduce local scour.
AB - Mangroves stabilize coastlines, partially through a porous ‘forest’ of trunks and aerial roots, which reportedly dissipate wave energy and reduce flow velocity. It is hypothesized that not only the vertical but also the horizontal components of the ‘forest’ contribute to the altering of flow field which mitigates scour. To test the hypothesis, the effect of a modified sacrificial pile group consisting of vertical mini-piles and (semi-) horizontal crossbars on the flow field around a downstream monopile is studied using computational fluid dynamics (CFD). The simulation results confirmed that the group of mini-piles significantly reduces both the horizontal and vertical velocity in front of the monopile as well as the flow-induced shear force at the bed. The presence of the crossbars reduces the horizontal velocities further, but more importantly, it helps significantly reduce or even reverse the downward flow at the front near the base of monopile. Such changes to the flow field are expected to reduce the strength of the horseshoe vortex and reduce local scour.
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U2 - 10.1061/9780784484050.040
DO - 10.1061/9780784484050.040
M3 - Conference article
AN - SCOPUS:85126930740
SN - 0895-0563
VL - 2022-March
SP - 385
EP - 394
JO - Geotechnical Special Publication
JF - Geotechnical Special Publication
IS - GSP 335
T2 - 2022 GeoCongress: State of the Art and Practice in Geotechnical Engineering - Geoenvironmental Engineering; Unsaturated Soils; and Contemporary Topics in Erosion, Sustainability, and Coal Combustion Residuals
Y2 - 20 March 2022 through 23 March 2022
ER -