TY - JOUR
T1 - Advection-diffusion sediment models in a two-phase flow perspective
AU - Keetels, G. H.
AU - Goeree, J. C.
AU - van Rhee, C.
PY - 2017
Y1 - 2017
N2 - Sediment profiles in open channels are usually predicted by advection-diffusion models. Most basic forms consider the terminal settling velocity of a single particle in still clear water. Alternative forms account for hindered settling at higher concentrations. It is not known, however, how these modifications relate to mass and momentum conservation of each phase. For dilute flow, it is known that the original form can be derived from a two-phase analysis, assuming a dilute suspension, neglect of inertial effects in the momentum balance and using a linear drag force formulation. Here we study how and if it is possible to understand the hindered-settling modifications for the non-dilute case, and formulate a relation between advection-diffusion models and parameters involved in the turbulent drag force. This note verifies that the transient two-phase flow solutions converge to steady state, and compares the results to experimental data.
AB - Sediment profiles in open channels are usually predicted by advection-diffusion models. Most basic forms consider the terminal settling velocity of a single particle in still clear water. Alternative forms account for hindered settling at higher concentrations. It is not known, however, how these modifications relate to mass and momentum conservation of each phase. For dilute flow, it is known that the original form can be derived from a two-phase analysis, assuming a dilute suspension, neglect of inertial effects in the momentum balance and using a linear drag force formulation. Here we study how and if it is possible to understand the hindered-settling modifications for the non-dilute case, and formulate a relation between advection-diffusion models and parameters involved in the turbulent drag force. This note verifies that the transient two-phase flow solutions converge to steady state, and compares the results to experimental data.
KW - Fluid–particle interactions
KW - particle-laden flows
KW - sedimentation
KW - suspended sediments
KW - turbulence-sediment interactions
UR - http://resolver.tudelft.nl/uuid:d96ff257-af23-4415-8123-749e69b22208
UR - http://www.scopus.com/inward/record.url?scp=85014494399&partnerID=8YFLogxK
U2 - 10.1080/00221686.2017.1289262
DO - 10.1080/00221686.2017.1289262
M3 - Article
AN - SCOPUS:85014494399
SN - 0022-1686
VL - 56 (2018)
SP - 136
EP - 140
JO - Journal of Hydraulic Research
JF - Journal of Hydraulic Research
IS - 1
ER -