scholarly journals A two-phase model for sheet flow regime based on dense granular flow rheology

2013 ◽  
Vol 118 (2) ◽  
pp. 619-634 ◽  
Author(s):  
T. Revil-Baudard ◽  
J. Chauchat
Keyword(s):  
Flow Regime ◽  
Granular Flow ◽  
Phase Model ◽  
Sheet Flow ◽  
Two Phase ◽  
Dense Granular Flow

scholarly journals Multi-dimensional rheology-based two-phase model for sediment transport and applications to sheet flow and pipeline scour

2016 ◽  
Vol 28 (5) ◽  
pp. 053305 ◽  
Author(s):  
Cheng-Hsien Lee ◽  
Ying Min Low ◽  
Yee-Meng Chiew
Keyword(s):  
Sediment Transport ◽  
Phase Model ◽  
Sheet Flow ◽  
Two Phase

scholarly journals Modelling of scour formation using SedFoam, continuum approach

2021 ◽  
Vol 249 ◽  
pp. 03038
Author(s):  
Alaa Ghzayel ◽  
Anthony Beaudoin ◽  
Sebastien Jarny
Keyword(s):  
Granular Flow ◽  
Water Jet ◽  
Comparison Study ◽  
Turbulent Model ◽  
Continuum Approach ◽  
Two Phase ◽  
Flow Solver ◽  
Dense Granular Flow ◽  
Model Setup ◽  
Precise Experimental Data

SedFOAM is a two-phase flow solver built upon consecutive laws, based on the CFD toolbox OpenFOAM. The sediment body is considered as a continuum phase. The intergranular and fluid stresses are modeled with the dense granular flow rheology and the k–ϵ turbulent model, respectively. The model setup will be based on an experimental study on the scour due to a water jet subjected to lateral confinement. A comparison study will be made based on precise experimental data by Martino et al. (2019) that will show the advantages and defaults of SedFoam. The objective of this work is to reproduce the digging and filling cycle of the scour formation due to the water jet in a confined canal. The first numerical results show that it needs to use 3D numerical simulations because of the fluctuation of the jet direction induced by the presence of a driven flow cavity.

scholarly journals Numerical Study for Near-Bed Variables in Velocity-Skewed Oscillatory Sheet Flow Transport

2017 ◽  
Vol 2017 ◽  
pp. 1-10
Author(s):  
Xin Chen ◽  
Zichao Zhang ◽  
Yong Li ◽  
Xiaoyan Shi
Keyword(s):  
Sediment Concentration ◽  
Sediment Flux ◽  
Phase Model ◽  
Phase Lag ◽  
Bed Sediment ◽  
Sheet Flow ◽  
Fall Velocity ◽  
Two Phase ◽  
Sediment Size ◽  
Flow Transport

The near-bed sediment concentration and vertical sediment flux are important in sediment transport mechanics, but they are known much less than the horizontal sediment flux, especially for fine sediment in unsteady flows. A developed two-phase model is applied to study the near-bed sediment concentration, vertical sediment flux, and the relevant total sediment amount for the velocity-skewed oscillatory sheet flow transport. With the sediment concentration hindered fall velocity, the classical reference concentration formulas conducted by Engelund and Fredsoe (1976) and Zyserman and Fredsoe (1994) are utilized for the comparison with the two-phase model and illustration of the phase-lag and sediment size effects in near-bed sediment concentration and vertical sediment flux. The concentration and vertical flux predicted by the two-phase model agree well with experimental data and are better than empirical formulas. Furthermore, the sediment size effect for pick-up flux function over starved bed is shown to be quite different from that containing sufficient sediment in oscillatory flows.

Two-phase model for human classical conditioning.

1968 ◽  
Vol 78 (3, Pt.1) ◽  
pp. 359-368 ◽  
Author(s):  
William F. Prokasy ◽  
Martha A. Harsanyi
Keyword(s):  
Classical Conditioning ◽  
Phase Model ◽  
Two Phase

TWO-PHASE CFD: THE VARIOUS APPROACHES AND THEIR APPLICABILITY TO EACH FLOW REGIME

2011 ◽  
Vol 23 (2-4) ◽  
pp. 101-128 ◽  
Author(s):  
D. Bestion ◽  
P. Coste ◽  
B. Niceno ◽  
S. Mimouni ◽  
D. Lakehal ◽  
...  
Keyword(s):  
Flow Regime ◽  
Two Phase
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