Abstract
Abstract
Highlights
Sediment beds under streaming water bodies often exhibit characteristic bedforms which can significantly affect the transport properties of the flow
Uhlmann the upstream surface and a steeper downstream face, the latter approximately inclined at the angle of repose (Best 2005). These two bedforms differ in their scaling properties: while ripples are small compared to the fluid height and their wavelength is believed to scale with the particle diameter, the height of dunes is large enough to distinctly modify the flow field over the entire flow depth
It should be stressed that, in all four simulations, the streamwise domain length Lx is almost constant in the range (6.04–6.52)Hf and clearly above the critical value observed in KU2017
Summary
Sediment beds under streaming water bodies often exhibit characteristic bedforms which can significantly affect the transport properties of the flow. Among these various bedforms, transverse bedforms are usually classified as ripples, dunes or antidunes (Yalin 1977). Uhlmann the upstream surface and a steeper downstream face, the latter approximately inclined at the angle of repose (Best 2005) These two bedforms differ in their scaling properties: while ripples are small compared to the fluid height and their wavelength is believed to scale with the particle diameter, the height of dunes is large enough to distinctly modify the flow field over the entire flow depth. Antidunes can only form in free-surface flows, whereas ripples and dunes can form in configurations without a free surface as well, such as pipe flows (see e.g. Ouriemi, Aussillous & Guazzelli 2009) or closed-conduit flows (see e.g. Coleman, Fedele & Garcia 2003; Cardona Florez & Franklin 2016)
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