Sand ripples and dunes
F Charru, B Andreotti, P Claudin - Annual Review of Fluid …, 2013 - annualreviews.org
An erodible bed sheared by a fluid flow, gas or liquid, is generally unstable, and bed forms
grow. This review discusses the following issues, in light of the recent literature: What are the …
grow. This review discusses the following issues, in light of the recent literature: What are the …
Fluvial dunes: initiation, characterization, flow structure
SE Coleman, VI Nikora - Earth Surface Processes and …, 2011 - Wiley Online Library
Research into fluvial dunes spans disciplines, studies at grain to reach scales, and
methodological approaches that include theoretical, experimental, numerical and field …
methodological approaches that include theoretical, experimental, numerical and field …
Turbulence modeling and simulation in hydraulics: A historical review
W Rodi - Journal of Hydraulic Engineering, 2017 - ascelibrary.org
The paper reviews in condensed form and from a historical perspective the various methods
for treating and simulating turbulence and its effects in hydraulic flows. After highlighting the …
for treating and simulating turbulence and its effects in hydraulic flows. After highlighting the …
Numerical simulation of sand waves in a turbulent open channel flow
A Khosronejad, F Sotiropoulos - Journal of Fluid Mechanics, 2014 - cambridge.org
We develop a coupled hydro-morphodynamic numerical model for carrying out large-eddy
simulation of stratified, turbulent flow over a mobile sand bed. The method is based on the …
simulation of stratified, turbulent flow over a mobile sand bed. The method is based on the …
Bedforms in a turbulent stream: formation of ripples by primary linear instability and of dunes by nonlinear pattern coarsening
A Fourriere, P Claudin, B Andreotti - Journal of Fluid Mechanics, 2010 - cambridge.org
It is widely accepted that both ripples and dunes form in rivers by primary linear instability;
the wavelength of the former scaling on the grain size and that of the latter being controlled …
the wavelength of the former scaling on the grain size and that of the latter being controlled …
Morphodynamics of small‐scale superimposed sand waves over migrating dune bed forms
The kinematics and morphodynamics of low‐amplitude, small‐scale sand waves developed
over migrating dunes are examined using data drawn from laboratory experiments. We refer …
over migrating dunes are examined using data drawn from laboratory experiments. We refer …
Rapidly migrating secondary bedforms can persist on the lee of slowly migrating primary river dunes
JY Zomer, S Naqshband, B Vermeulen… - Journal of …, 2021 - Wiley Online Library
Trains of secondary bedforms, superimposed on primary dunes, have been observed in
rivers worldwide. To date, it has remained unclear how these secondary bedforms affect the …
rivers worldwide. To date, it has remained unclear how these secondary bedforms affect the …
The trouble with shear stress
Predicted bedload fluxes often have large errors partly because calculations usually do not
include spatial and temporal flow variability. Sediment motion is driven by a temporal …
include spatial and temporal flow variability. Sediment motion is driven by a temporal …
On the transition between 2D and 3D dunes
Sediment transport in sand‐bedded alluvial channels is strongly conditioned by bedforms,
the planimetric morphology of which can be either two‐or three‐dimensional. Experiments …
the planimetric morphology of which can be either two‐or three‐dimensional. Experiments …
Initial stages of erosion and bed form development in a turbulent flow around a cylindrical pier
C Escauriaza, F Sotiropoulos - Journal of Geophysical …, 2011 - Wiley Online Library
Bed load transport and erosion in fine sediment beds are mainly driven by the dynamics of
the near‐bed turbulent flow. In situations when the shear stress is not sufficiently high to …
the near‐bed turbulent flow. In situations when the shear stress is not sufficiently high to …