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Volume 7, Issue 14 (Autumn and Winter 2012 2012)                   Marine Engineering 2012, 7(14): 71-87 | Back to browse issues page

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Kazemi E, Zanganeh M, Yeganeh-Bakhtiary A, Houshangi H. Two-Phase Flow Modeling of Bed-Load Transport Using A Lagrangian-Lagrangian Model . Marine Engineering 2012; 7 (14) :71-87
URL: http://marine-eng.ir/article-1-191-en.html
Two-Phase Flow Modeling of Bed-Load Transport Using A Lagrangian-Lagrangian Model
Ehsan Kazemi1 , Morteza Zanganeh1 , Abbas Yeganeh-Bakhtiary *1 , Hamid Houshangi1
1- ., Iran University of Science &Technolgy
Abstract:   (9502 Views)
Bed-load transport is effective on river bed stability and Morphology. Therefore, modeling this phenomenon is very important in the field of hydraulics engineering. Bed-load transport occurs by saltation at low to medium shear stress and by sheet-flow at high shear stress. In the present paper, the hydrodynamics of transport in thesaltationand sheet-flow regimes under unidirectional flow is studied using a Lagrangian model based on I-SPH method. The fluid and sediment phases are modeled separately as Newtonian and non-Newtonian fluids respectively. Fluid-sediment interaction is modeled using drag force to define interaction mechanism. To calibrate and validate the numerical model, the result is compared with experiments. There is a good agreement between them that illustrates the applicability of the present model in the simulation of both saltation and sheet-flow regimes hydrodynamics.
Keywords: Bed-load transport, I-SPH, Lagrange-Lagrange coupling model, Saltation, Sheet-flow, two-phase flow model.
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Type of Study: Research Paper | Subject: Offshore Hydrodynamic
Received: 2012/06/11 | Accepted: 2013/10/19
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