An extension of the drift-flux model for submarine granular flows

Journal article (2016)

Authors

D. Weij Offshore and Dredging Engineering - Mechanical, Maritime and Materials Engineering
G.H. Keetels Offshore and Dredging Engineering - Mechanical, Maritime and Materials Engineering
J.C. Goeree Offshore and Dredging Engineering - Mechanical, Maritime and Materials Engineering
C. van Rhee Offshore and Dredging Engineering - Mechanical, Maritime and Materials Engineering
Research Group
Offshore and Dredging Engineering (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2016 D. Weij, G.H. Keetels, J.C. Goeree, C. van Rhee
DOI
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https://doi.org/10.2495/CMEM-V4-N4-444-453
Numerical modelling Granular flow Granular pressure OpenFOAM Sand-water mixtures
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Published Date

2016

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Marine and Transport Technology

Research Group

Offshore and Dredging Engineering

Abstract

To model submarine flows of granular materials we propose an extension of the drift-flux approach. The extended model is able to represent dilute suspensions as well as dense granular flows. The dense granwular flow is modelled as a Herschel–Bulkley fluid, with a yield stress that depends on the dispersed phase pressure. Qualitative numerical experiments show that the model is able to correctly reproduce the stability of submerged sand heaps with different internal angles of friction and initial slopes. When initially starting with heaps with an angle smaller than the internal angle of friction, the heaps are stable. When starting with heaps with angles larger than the internal angle of friction, a flow of solid material is initiated. The flow later stops when the bed is at an angle smaller than the internal angle of friction.

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