Abstract
The fluid flow over rough sand beds in rivers has unique dynamics compared with the flows that occur when the bed is flat. Depending on the flow Reynolds number, the most commonly found river-bed formations are ripples and dunes. Ripples have dimensions much smaller than the river depth, while dunes may reach heights of the order of the depth. Ripples do not affect the dynamics of the whole flow depth whereas dunes influence on the turbulent flow as well as the sediment transport at the whole depth. Dune formation may affect navigation, erosion of bridge piles and other structures, as well as dispersion of contaminants (Itakura and Kishi, 1980).
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Armenio V, Piomelli U (2000) A Lagrangian mixed subgrid-scale model in generalized coordinates. Flow, Turbulence and Combustion 65:51–81
Babakaiff SC, Hickin EJ (1996) Coherent Flow Structures in Squamish River Estuary, British Columbia, Canada. In: Ashworth P, Bennett S, Best JL, McLelland S (eds) Coherent Flow Structures in Open Channels, Wiley, New York
Best JL, Kostaschuk RA, Villard PV (2001) Quantitative Visualization of Flow Fields Associated with Alluvial Sand Dunes: Results from the Laboratory and Field Using Ultrasonic and Acoustic Doppler Anemometry. Journal of Visualization 4:373–381
Best J (2005) Kinematics, topology and significance of dune-related macroturbulence: some observations from the laboratory and field. Spec Publs int Ass Sediment 35:41–60
Best J (2005) The fluid dynamics of river dunes: A review and some future research directions. Journal of Geophysical Research, doi: 10.1029/2004JF000218
Germano M, Piomelli U, Moin P, Cabot WH (1991) A dynamic subgrid scale eddy viscosity model. Physics of Fluids A 3:1760–1765
Grigoriadis DGE, Balaras E, Dimas AA (2009) Large-eddy simulations of unidirectional water flow over dunes. Journal of Geophysical Research, doi: 10.1029/2008JF001014
Itakura T, Kishi T (1980) Open channel flow with suspended sediment on sand waves. Proceedings of the Third International Symposium on Stochastic Hydraulics, 599–609
Kadota A, Nezu I (1999) Three-dimensional structure of space-time correlation on coherent vortices generated behind dune crest. Journal of Hydraulic Research 37:59–80
Kim J, Moin P (1985) Application of a fractional step method to incompressible Navier-Stokes equations. Journal of Computational Physics 59:308–323
Kostaschuk RA, Church MA (1993) Macroturbulence generated by dunes: Fraser River, Canada. Sedimentary Geology 85:25–37
Leonard A (1974) Energy cascade in large-eddy simulations of turbulent fluid flows. In: Turbulent diffusion in environmental pollution; Proceedings of the Second Symposium 75:237–248
Meneveau C, Lund TS, Cabot WH (1996) A Lagrangian dynamic subgrid-scale model of turbulence. Journal of Fluid Mechanics 319:353–385
Muller A, Gyr A (1986) On the vortex formation in the mixing layer behind dunes. Journal of Hydraulic Research 24:359–375
Nezu I, Nakagawa H (1993) Turbulence in Open-Channel Flows. Balkema
Radhakrishnan S, Piomelli U, Keating A, Lopes AS (2006) Reynolds-averaged and large-eddy simulations of turbulent non-equilibrium flows. Journal of Turbulence 7(63):1–30
Radhakrishnan S, Piomelli U (2008) Large-eddy simulation of oscillating boundary layers: Model comparison and validation. Journal of Geophysical Research, doi: 10.1029/2007JC004518
Rhie C, Chow W (1983) Numerical study of the turbulent flow past an airfoil with trailing edge separation. AIAA Journal 21:1525–1532
Robinson SK (1991) Coherent motions in the turbulent boundary layer. Annu. Rev. Fluid Mech. 23:601–639
Silva-Lopez A, Palma JMLM (2002) Simulations of isotropic turbulence using a non-orthogonal grid system. Journal of Computational Physics 175:713–738
Silva-Lopez A, Piomelli U, Palma JMLM (2006) Large-eddy simulation of the flow in an S-duct. Journal of Turbulence 7(11):1–24
Stoesser T, Braun C, Garcia-Villalba M, Rodi W (2008) Turbulence structures in flow over two-dimensional dunes. Journal of Hydraulic Engineering 134(1):42–54
Venditti IG, Bennet SJ (2000) Spectral analysis of turbulent flow and suspended sediment transport over dunes. Journal of Geophysical Research 105:22035–22047
Yoon JY, Patel VC (1996) Numerical model of turbulent flow over sand dune. Journal of Hydraulic Engineering 122(1):10–18
Yue W, Lin CL, Patel VC (2005) Large-eddy simulation of turbulent open-channel flow with free surface simulated by level set method. Physics of Fluids 17:1–12
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2011 Springer Science+Business Media B.V.
About this paper
Cite this paper
Omidyeganeh, M., Piomelli, U. (2011). Coherent Structures in the Flow over Two-Dimensional Dunes. In: Kuerten, H., Geurts, B., Armenio, V., Fröhlich, J. (eds) Direct and Large-Eddy Simulation VIII. ERCOFTAC Series, vol 15. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2482-2_39
Download citation
DOI: https://doi.org/10.1007/978-94-007-2482-2_39
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-007-2481-5
Online ISBN: 978-94-007-2482-2
eBook Packages: EngineeringEngineering (R0)