This paper is aimed at presenting i) a simple, yet sound, conceptual model ap-plicable to the simulation of erosion, deposition and transport of cohesionlesssediment in stratiﬁed ﬂows under high shear stresses and ii) numerical solutionsin idealized unsteady ﬂow non-equilibrium transport situations. The conceptualmodel for the granular phase comprises 2DV mass and momentum and energyequations and constitutive equations, all derived within the dense limit of theChapman-Enskog kinetic theory. 1D shallow-ﬂow conservation and closure equa-tions are derived for the ﬂuid-granular mixture. Formulas for the average velocityin the transport layers, the vertical net ﬂux of sediment mass and the thickness ofthe transport layer are thus obtained. Numerical solutions for dam-break ﬂowsover cohesionless mobile beds in prismatic and non-prismatic channels are ob-tained and discussed.
|Title of host publication||IAHR Congress|
|Publication status||Published - 1 Jan 2009|
|Event||XXXIII IAHR Congress - |
Duration: 1 Jan 2009 → …
|Conference||XXXIII IAHR Congress|
|Period||1/01/09 → …|