Improving the 2D Numerical Simulations on Local Scour Hole around Spur Dikes
Local scour is a common threat to structures such as bridge piers, abutments, and dikes that are constructed on natural rivers. To reduce the risk of foundation failure, the understanding of local scour phenomenon around hydraulic structures is important. The well-predicted scour depth can be used a...
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| Veröffentlicht in: | Water (Basel) 2021-06, Vol.13 (11), p.1462 |
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| creator | Liao, Chung-Ta Yeh, Keh-Chia Lan, Yin-Chi Jhong, Ren-Kai Jia, Yafei |
| description | Local scour is a common threat to structures such as bridge piers, abutments, and dikes that are constructed on natural rivers. To reduce the risk of foundation failure, the understanding of local scour phenomenon around hydraulic structures is important. The well-predicted scour depth can be used as a reference for structural foundation design and river management. Numerical simulation is relatively efficient at studying these issues. Currently, two-dimensional (2D) mobile-bed models are widely used for river engineering. However, a common 2D model is inadequate for solving the three-dimensional (3D) flow field and local scour phenomenon because of the depth-averaged hypothesis. This causes the predicted scour depth to often be underestimated. In this study, a repose angle formula and bed geometry adjustment mechanism are integrated into a 2D mobile-bed model to improve the numerical simulation of local scour holes around structures. Comparison of the calculated and measured bed variation data reveals that a numerical model involving the improvement technique can predict the geometry of a local scour hole around spur dikes with reasonable accuracy and reliability. |
| doi_str_mv | 10.3390/w13111462 |
| format | Article |
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To reduce the risk of foundation failure, the understanding of local scour phenomenon around hydraulic structures is important. The well-predicted scour depth can be used as a reference for structural foundation design and river management. Numerical simulation is relatively efficient at studying these issues. Currently, two-dimensional (2D) mobile-bed models are widely used for river engineering. However, a common 2D model is inadequate for solving the three-dimensional (3D) flow field and local scour phenomenon because of the depth-averaged hypothesis. This causes the predicted scour depth to often be underestimated. In this study, a repose angle formula and bed geometry adjustment mechanism are integrated into a 2D mobile-bed model to improve the numerical simulation of local scour holes around structures. Comparison of the calculated and measured bed variation data reveals that a numerical model involving the improvement technique can predict the geometry of a local scour hole around spur dikes with reasonable accuracy and reliability.</description><identifier>ISSN: 2073-4441</identifier><identifier>EISSN: 2073-4441</identifier><identifier>DOI: 10.3390/w13111462</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Abutments ; Analysis ; Angle of repose ; Bridge abutments ; Bridge piers ; Bridges ; Dikes (Engineering) ; Engineering ; Equilibrium ; Foundation failure ; Geometry ; Gravity ; Hydraulic measurements ; Hydraulic structures ; Hydraulics ; Mathematical models ; Numerical analysis ; Numerical models ; Piers ; Risk reduction ; River engineering ; Rivers ; Scour ; Scouring ; Sediment transport ; Shear stress ; Simulation ; Simulation methods ; Soil erosion ; Spur dikes ; Surface water ; Three dimensional flow ; Turbulence models ; Two dimensional models</subject><ispartof>Water (Basel), 2021-06, Vol.13 (11), p.1462</ispartof><rights>COPYRIGHT 2021 MDPI AG</rights><rights>2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c331t-aede4c0199bf0e6fa3b90ef0213eae869158131257d125d183e062c015e893893</citedby><cites>FETCH-LOGICAL-c331t-aede4c0199bf0e6fa3b90ef0213eae869158131257d125d183e062c015e893893</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids></links><search><creatorcontrib>Liao, Chung-Ta</creatorcontrib><creatorcontrib>Yeh, Keh-Chia</creatorcontrib><creatorcontrib>Lan, Yin-Chi</creatorcontrib><creatorcontrib>Jhong, Ren-Kai</creatorcontrib><creatorcontrib>Jia, Yafei</creatorcontrib><title>Improving the 2D Numerical Simulations on Local Scour Hole around Spur Dikes</title><title>Water (Basel)</title><description>Local scour is a common threat to structures such as bridge piers, abutments, and dikes that are constructed on natural rivers. To reduce the risk of foundation failure, the understanding of local scour phenomenon around hydraulic structures is important. The well-predicted scour depth can be used as a reference for structural foundation design and river management. Numerical simulation is relatively efficient at studying these issues. Currently, two-dimensional (2D) mobile-bed models are widely used for river engineering. However, a common 2D model is inadequate for solving the three-dimensional (3D) flow field and local scour phenomenon because of the depth-averaged hypothesis. This causes the predicted scour depth to often be underestimated. In this study, a repose angle formula and bed geometry adjustment mechanism are integrated into a 2D mobile-bed model to improve the numerical simulation of local scour holes around structures. Comparison of the calculated and measured bed variation data reveals that a numerical model involving the improvement technique can predict the geometry of a local scour hole around spur dikes with reasonable accuracy and reliability.</description><subject>Abutments</subject><subject>Analysis</subject><subject>Angle of repose</subject><subject>Bridge abutments</subject><subject>Bridge piers</subject><subject>Bridges</subject><subject>Dikes (Engineering)</subject><subject>Engineering</subject><subject>Equilibrium</subject><subject>Foundation failure</subject><subject>Geometry</subject><subject>Gravity</subject><subject>Hydraulic measurements</subject><subject>Hydraulic structures</subject><subject>Hydraulics</subject><subject>Mathematical models</subject><subject>Numerical analysis</subject><subject>Numerical models</subject><subject>Piers</subject><subject>Risk reduction</subject><subject>River engineering</subject><subject>Rivers</subject><subject>Scour</subject><subject>Scouring</subject><subject>Sediment transport</subject><subject>Shear stress</subject><subject>Simulation</subject><subject>Simulation methods</subject><subject>Soil erosion</subject><subject>Spur dikes</subject><subject>Surface water</subject><subject>Three dimensional flow</subject><subject>Turbulence models</subject><subject>Two dimensional models</subject><issn>2073-4441</issn><issn>2073-4441</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpNUMFOwzAMjRBITGMH_iASJw4dSZN2zXHagE2q4DA4V1nqjIy2GUkL4u8xDCHiyLae_OxnE3LJ2VQIxW4-uOCcyzw9IaOUzUQipeSn__JzMolxz_BJVRQZG5Fy3R6Cf3fdjvYvQNMlfRhaCM7ohm5cOzS6d76L1He09D-g8UOgK98A1cEPXU03BwSW7hXiBTmzuokw-Y1j8nx3-7RYJeXj_XoxLxMjBO8TDTVIw7hSW8sgt1psFQPLUi5AQ5ErnhW4SZrNanQ1LwSwPEVCBoUS-Mfk6tgXpb8NEPtqj6I6HFmlmcTthMg4Vk2PVTvdQOU66_ugDVoNrTO-A-sQn88UR1VS5ki4PhJM8DEGsNUhuFaHz4qz6vvA1d-BxRc-mGo2</recordid><startdate>20210601</startdate><enddate>20210601</enddate><creator>Liao, Chung-Ta</creator><creator>Yeh, Keh-Chia</creator><creator>Lan, Yin-Chi</creator><creator>Jhong, Ren-Kai</creator><creator>Jia, Yafei</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope></search><sort><creationdate>20210601</creationdate><title>Improving the 2D Numerical Simulations on Local Scour Hole around Spur Dikes</title><author>Liao, Chung-Ta ; Yeh, Keh-Chia ; Lan, Yin-Chi ; Jhong, Ren-Kai ; Jia, Yafei</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c331t-aede4c0199bf0e6fa3b90ef0213eae869158131257d125d183e062c015e893893</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Abutments</topic><topic>Analysis</topic><topic>Angle of repose</topic><topic>Bridge abutments</topic><topic>Bridge piers</topic><topic>Bridges</topic><topic>Dikes (Engineering)</topic><topic>Engineering</topic><topic>Equilibrium</topic><topic>Foundation failure</topic><topic>Geometry</topic><topic>Gravity</topic><topic>Hydraulic measurements</topic><topic>Hydraulic structures</topic><topic>Hydraulics</topic><topic>Mathematical models</topic><topic>Numerical analysis</topic><topic>Numerical models</topic><topic>Piers</topic><topic>Risk reduction</topic><topic>River engineering</topic><topic>Rivers</topic><topic>Scour</topic><topic>Scouring</topic><topic>Sediment transport</topic><topic>Shear stress</topic><topic>Simulation</topic><topic>Simulation methods</topic><topic>Soil erosion</topic><topic>Spur dikes</topic><topic>Surface water</topic><topic>Three dimensional flow</topic><topic>Turbulence models</topic><topic>Two dimensional models</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Liao, Chung-Ta</creatorcontrib><creatorcontrib>Yeh, Keh-Chia</creatorcontrib><creatorcontrib>Lan, Yin-Chi</creatorcontrib><creatorcontrib>Jhong, Ren-Kai</creatorcontrib><creatorcontrib>Jia, Yafei</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><jtitle>Water (Basel)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Liao, Chung-Ta</au><au>Yeh, Keh-Chia</au><au>Lan, Yin-Chi</au><au>Jhong, Ren-Kai</au><au>Jia, Yafei</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Improving the 2D Numerical Simulations on Local Scour Hole around Spur Dikes</atitle><jtitle>Water (Basel)</jtitle><date>2021-06-01</date><risdate>2021</risdate><volume>13</volume><issue>11</issue><spage>1462</spage><pages>1462-</pages><issn>2073-4441</issn><eissn>2073-4441</eissn><abstract>Local scour is a common threat to structures such as bridge piers, abutments, and dikes that are constructed on natural rivers. To reduce the risk of foundation failure, the understanding of local scour phenomenon around hydraulic structures is important. The well-predicted scour depth can be used as a reference for structural foundation design and river management. Numerical simulation is relatively efficient at studying these issues. Currently, two-dimensional (2D) mobile-bed models are widely used for river engineering. However, a common 2D model is inadequate for solving the three-dimensional (3D) flow field and local scour phenomenon because of the depth-averaged hypothesis. This causes the predicted scour depth to often be underestimated. In this study, a repose angle formula and bed geometry adjustment mechanism are integrated into a 2D mobile-bed model to improve the numerical simulation of local scour holes around structures. Comparison of the calculated and measured bed variation data reveals that a numerical model involving the improvement technique can predict the geometry of a local scour hole around spur dikes with reasonable accuracy and reliability.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/w13111462</doi><oa>free_for_read</oa></addata></record> |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; MDPI - Multidisciplinary Digital Publishing Institute |
| subjects | Abutments Analysis Angle of repose Bridge abutments Bridge piers Bridges Dikes (Engineering) Engineering Equilibrium Foundation failure Geometry Gravity Hydraulic measurements Hydraulic structures Hydraulics Mathematical models Numerical analysis Numerical models Piers Risk reduction River engineering Rivers Scour Scouring Sediment transport Shear stress Simulation Simulation methods Soil erosion Spur dikes Surface water Three dimensional flow Turbulence models Two dimensional models |
| title | Improving the 2D Numerical Simulations on Local Scour Hole around Spur Dikes |
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