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THESIS 2011, France (2011)

Bedload Transport. Part 2: The mobile granular Layer

Mickael Pailha 1, Julien Chauchat 2, Pascale Aussillous 1, Marc Medale 1, Elisabeth Guazzelli 1

(2011-04-26)

We present a joint theoretical, numerical, and experimental investigation of the mobile granular layer in bedload transport conditions for pipe flows. The theoretical approach uses a twophase model having a Newtonian rheology for the fluid phase and Coulomb-type friction for the particulate phase which has been recently proposed by Ouriemi et al. (2009a). This model has been implemented into a 3D numerical code by Chauchat and Médale (2010) which can describe bedload transport in square and circular cross-section ducts. The experiments are undertaken in a rectangular duct partially filled with transparent spherical particles driven by an index-matched fluid. Direct imaging of the particles and of the fluid in a vertical slice is obtained owing to the addition of fluorescing tracers and to the illumination of the duct by a laser sheet. The main quantity that will be examined and discussed is the velocity field.

1:	Institut universitaire des systèmes thermiques industriels (IUSTI)
	CNRS : UMR6595 – Université de Provence - Aix-Marseille I
2:	Laboratoire des écoulements géophysiques et industriels (LEGI)
	CNRS : UMR5519 – Université Joseph Fourier - Grenoble I – Institut polytechnique de Grenoble (Grenoble INP)

Subject

:

Physics/Mechanics/Mechanics of the fluids Engineering Sciences/Mechanics/Fluids mechanics

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From: Julien Chauchat <>

Submitted on: Friday, 9 September 2011 13:22:01

Updated on: Wednesday, 21 September 2011 22:04:57