Two-Phase Flow Modeling of Sediment Motion in Sheet-Flows above Plane Beds
Publication: Journal of Hydraulic Engineering
Volume 131, Issue 5
Abstract
Most models of sediment transport are based on the hypothesis of a weak interaction between the fluid and the sediment phase, where the main flow is subjected to the mass and momentum conservation of the fluid phase, with small corrections due to the presence of the sediments. These models usually give a correct answer for conditions where the concentration of sediment is really low. In the case of high sediment transport, some models analyze the two subdomains separately, the high and the low concentration, and employ different constitutive equations. In the present model there is a two-phase description of the whole domain. The closure of the turbulence and the interaction between the sediments and the fluid introduce approximations, but results are consistent with experiments and previous models.
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Acknowledgments
This work was supported by Italian Ministry for Research (MIUR) COFIN 2001 (ex-40%), Parma Research Group, project “Convivere con le frane: Effetti su infrastrutture e insediamenti urbani. Strategie di intervento per la mitigazione del rischio.” The numerical model development was undertaken while the writer was a visiting research fellow at HR Wallingford Ltd. (U.K.) and was supported by the European Commission Human Capital Mobility Programme, Contract No. ERBCHBGCT920042. The suggestions of the anonymous reviewers have been greatly appreciated.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 131 • Issue 5 • May 2005
Pages: 366 - 379
Copyright
© 2005 ASCE.
History
Received: Jan 23, 2003
Accepted: Aug 31, 2004
Published online: May 1, 2005
Published in print: May 2005
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