Three dimensional model for particle saltation close to stream beds, including a detailed description of the particle interaction with turbulence and inter-particle collisions

Handle URI:
http://hdl.handle.net/10754/564380
Title:
Three dimensional model for particle saltation close to stream beds, including a detailed description of the particle interaction with turbulence and inter-particle collisions
Authors:
Moreno, Pablo M.; Bombardelli, Fabián A.; González, Andrea E.; Calo, Victor M. ( 0000-0002-1805-4045 )
Abstract:
We present in this paper a new three-dimensional (3-D) model for bed-load sediment transport, based on a Lagrangian description. We analyze generalized sub-models for the velocities after collision and the representation of the bed-roughness. The free-flight sub-model includes the effect of several forces, such as buoyancy, drag, virtual mass, lift, Basset and Magnus, and also addresses the particle rotation. A recent methodology for saving computational time in the Basset force is also employed. The sub-models for the post-collision velocity and rotation are based on the conservation of linear and angular momentum during the collision with the bed. We develop a new 3-D representation for the bed roughness by using geometric considerations. In order to address the interaction of particles with the turbulent flow, we tracked the particles through a computed turbulent velocity field for a smooth flat plate. This velocity field was used as a surrogate of the 3-D turbulent conditions close to the bed in streams. We first checked that the basic turbulence statistics for this velocity field could be used to approximate those in an open-channel flow. We then analyzed the interaction of the sediment and the turbulence for a single and multiple particles. We compared numerical results with experimental data obtained by Niño and García (1998b). We show that model predictions are in good agreement with existing data, in the sand size range. © 2011 ASCE.
KAUST Department:
Applied Mathematics and Computational Science Program; Earth Science and Engineering Program; Physical Sciences and Engineering (PSE) Division; Environmental Science and Engineering Program; Numerical Porous Media SRI Center (NumPor)
Publisher:
American Society of Civil Engineers (ASCE)
Journal:
World Environmental and Water Resources Congress 2011
Conference/Event name:
World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability
Issue Date:
19-May-2011
DOI:
10.1061/41173(414)217
Type:
Conference Paper
ISBN:
9780784411735
Appears in Collections:
Conference Papers; Environmental Science and Engineering Program; Applied Mathematics and Computational Science Program; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorMoreno, Pablo M.en
dc.contributor.authorBombardelli, Fabián A.en
dc.contributor.authorGonzález, Andrea E.en
dc.contributor.authorCalo, Victor M.en
dc.date.accessioned2015-08-04T06:25:33Zen
dc.date.available2015-08-04T06:25:33Zen
dc.date.issued2011-05-19en
dc.identifier.isbn9780784411735en
dc.identifier.doi10.1061/41173(414)217en
dc.identifier.urihttp://hdl.handle.net/10754/564380en
dc.description.abstractWe present in this paper a new three-dimensional (3-D) model for bed-load sediment transport, based on a Lagrangian description. We analyze generalized sub-models for the velocities after collision and the representation of the bed-roughness. The free-flight sub-model includes the effect of several forces, such as buoyancy, drag, virtual mass, lift, Basset and Magnus, and also addresses the particle rotation. A recent methodology for saving computational time in the Basset force is also employed. The sub-models for the post-collision velocity and rotation are based on the conservation of linear and angular momentum during the collision with the bed. We develop a new 3-D representation for the bed roughness by using geometric considerations. In order to address the interaction of particles with the turbulent flow, we tracked the particles through a computed turbulent velocity field for a smooth flat plate. This velocity field was used as a surrogate of the 3-D turbulent conditions close to the bed in streams. We first checked that the basic turbulence statistics for this velocity field could be used to approximate those in an open-channel flow. We then analyzed the interaction of the sediment and the turbulence for a single and multiple particles. We compared numerical results with experimental data obtained by Niño and García (1998b). We show that model predictions are in good agreement with existing data, in the sand size range. © 2011 ASCE.en
dc.publisherAmerican Society of Civil Engineers (ASCE)en
dc.subjectBed loadsen
dc.subjectParticlesen
dc.subjectRiver bedsen
dc.subjectThree-dimensional modelsen
dc.subjectTurbulenceen
dc.titleThree dimensional model for particle saltation close to stream beds, including a detailed description of the particle interaction with turbulence and inter-particle collisionsen
dc.typeConference Paperen
dc.contributor.departmentApplied Mathematics and Computational Science Programen
dc.contributor.departmentEarth Science and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentNumerical Porous Media SRI Center (NumPor)en
dc.identifier.journalWorld Environmental and Water Resources Congress 2011en
dc.conference.date22 May 2011 through 26 May 2011en
dc.conference.nameWorld Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainabilityen
dc.conference.locationPalm Springs, CAen
dc.contributor.institutionDepartment of Civil and Environmental Engineering, University of California, Davis, 2001 Ghausi Hall, One Shields Ave., Davis, CA 95616, United Statesen
dc.contributor.institutionEscuela de Ingeniería en Obras Civiles, Universidad Diego Portales, Ejercito 441, Santiago, Chileen
kaust.authorCalo, Victor M.en
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