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dc.contributor.authorMoreno, Pablo M.
dc.contributor.authorBombardelli, Fabián A.
dc.contributor.authorGonzález, Andrea E.
dc.contributor.authorCalo, Victor M.
dc.date.accessioned2015-08-04T06:25:33Z
dc.date.available2015-08-04T06:25:33Z
dc.date.issued2012-04-26
dc.identifier.citationMoreno, P. M., Bombardelli, F. A., Gonzalez, A. E., & Calo, V. M. (2011). Three Dimensional Model for Particle Saltation Close to Stream Beds, Including a Detailed Description of the Particle Interaction with Turbulence and Inter-Particle Collisions. World Environmental and Water Resources Congress 2011. doi:10.1061/41173(414)217
dc.identifier.isbn9780784411735
dc.identifier.doi10.1061/41173(414)217
dc.identifier.urihttp://hdl.handle.net/10754/564380
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.
dc.publisherAmerican Society of Civil Engineers (ASCE)
dc.subjectBed loads
dc.subjectParticles
dc.subjectRiver beds
dc.subjectThree-dimensional models
dc.subjectTurbulence
dc.titleThree dimensional model for particle saltation close to stream beds, including a detailed description of the particle interaction with turbulence and inter-particle collisions
dc.typeConference Paper
dc.contributor.departmentApplied Mathematics and Computational Science Program
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentNumerical Porous Media SRI Center (NumPor)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalWorld Environmental and Water Resources Congress 2011
dc.conference.date22 May 2011 through 26 May 2011
dc.conference.nameWorld Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability
dc.conference.locationPalm Springs, CA
dc.contributor.institutionDepartment of Civil and Environmental Engineering, University of California, Davis, 2001 Ghausi Hall, One Shields Ave., Davis, CA 95616, United States
dc.contributor.institutionEscuela de Ingeniería en Obras Civiles, Universidad Diego Portales, Ejercito 441, Santiago, Chile
kaust.personCalo, Victor M.
dc.date.published-online2012-04-26
dc.date.published-print2011-05-19


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