Momentum Exchange in Straight Uniform Compound Channel Flow

Prooijen, Bram C. van; Battjes, J.A.; Uijttewaal, W.S.J.

doi:10.1061/(asce)0733-9429(2005)131:3(175)

Cited by 144 publications

(113 citation statements)

References 18 publications

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“…This highlights the point made earlier about "solidifying" false concepts through sketches. Alternative sketches of this 3D phenomenon are given by a number of other authors, such as Fukuoka and Fujita (1989) and van Prooijen et al (2005). A fuller explanation of the interaction between the vortices, with photographs is given by Knight and Shiono (1996), Knight (2008), Chapter 17 of Knight and Shamseldin (2006) and in Chapter 2 of Ikeda and McEwan (2009).…”

Section: Question 1 -What Level Of Modelling Is Generally Required Inmentioning

confidence: 99%

River hydraulics – a view from midstream

Knight

2013

Journal of Hydraulic Research

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Six distinct "views" of river hydraulics are presented, beginning with what influences us today, given our shared history, to what we can learn from others as they tackled research topics in their day. Other views relate to how we regard rivers through laboratory studies, the computer screen or in nature at full scale, and to how we might view research problems in the future. Interspersed with these various views are 10 questions that are frequently asked of river engineers, along with some possible answers. In attempting to answer these particular questions, some insights gained from a career in river hydraulics research are offered as a guide to others, both in practice or academe, as they raise some further issues which are worth reflecting on. This paper is particularly aimed at emerging hydraulic researchers and young engineers who are embarking on a career in river hydrodynamics.

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Section: Question 1 -What Level Of Modelling Is Generally Required Inmentioning

confidence: 99%

River hydraulics – a view from midstream

Knight

2013

Journal of Hydraulic Research

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“…The vertical compression will accelerate the flow towards the flood plain and decelerate the reverse flow leading to a deformation of the eddy structures. This effect is supposed to enhance mixing proportional to the relative change in water depth (Van Prooijen et al 2005). Implementing this idea in a simple momentum balance produces good agreement with experimental data.…”

Section: Effects Of Transverse Depth Variationmentioning

confidence: 78%

“…Although this mixing layer looks very similar to the previous configuration the effect of the transverse depth variation is that the transverse velocity difference will not disappear with downstream distance. Furthermore, any transverse motion in the mixing layer will sense the variation in depth ( Van Prooijen et al 2005). …”

Section: Differences In Inflow Velocities As It Is Found With River Cmentioning

confidence: 99%

Horizontal Mixing in Shallow Flows

Uijttewaal

2005

Water Quality Hazards and Dispersion of Pollutants

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“…On the one hand, vortical structures can be regarded as the manifestation of the shear instability at the junction of two different streams (van Prooijen and Uijttewaal 2002;van Prooijen et al 2005); on the other hand, they can be seen as the outcome of differential energy dissipation of shallow-water currents interacting with submerged obstacles Soldini et al 2004;Kennedy et al 2006).…”

Section: Turbulence Evolving On the Horizontal Planementioning

confidence: 99%

“…They may be conditioned or even generated by turbulent instability at smaller scales and, in turn, may be responsible for changes in the overall turbulence of the flow, and include secondary currents in river bends (Blanckaert and De Vriend 2005;Termini and Piraino 2011;Nikora and Roy 2012;Abad et al 2013), horizontal coherent vortices at the boundary between the main channel and floodplains (Knight and Shiono 1990;Shiono and Muto 1998;van Prooijen et al 2005;Proust et al 2013), and lowfrequency large-scale flow structures traveling in low-submergence flows (Kirkbride and Ferguson 1995;Roy et al 2004;.…”

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confidence: 99%

Turbulence in Rivers

Franca

Brocchini

2015

Rivers – Physical, Fluvial and Environmental Processes

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The study of turbulence has always been a challenge for scientists working on geophysical flows. Turbulent flows are common in nature and have an important role in geophysical disciplines such as river morphology, landscape modeling, atmospheric dynamics and ocean currents. At present, new measurement and observation techniques suitable for fieldwork can be combined with laboratory and theoretical work to advance the understanding of river processes. Nevertheless, despite more than a century of attempts to correctly formalize turbulent flows, much still remains to be done by researchers and engineers working in hydraulics and fluid mechanics. In this contribution we introduce a general framework for the analysis of river turbulence. We revisit some findings and theoretical frameworks and provide a critical analysis of where the study of turbulence is important and how to include detailed information of this in the analysis of fluvial processes. We also provide a perspective of some general aspects that are essential for researchers/ practitioners addressing the subject for the first time. Furthermore, we show some results of interest to scientists and engineers working on river flows.

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Momentum Exchange in Straight Uniform Compound Channel Flow

Cited by 144 publications

References 18 publications

River hydraulics – a view from midstream

River hydraulics – a view from midstream

Horizontal Mixing in Shallow Flows

Turbulence in Rivers

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