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Numerical investigation of local scour at two adjacent cylinders
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TLDR
In this paper, the authors investigated local scour around cylinders in a side-by-side or tandem arrangement under clear-water conditions, using large eddy simulations with a Smagorinsky subgrid model combined with a ghostcell immersed boundary method, and details of the bed scouring are realized with sophisticated sediment and morphodynamic models.About:
This article is published in Advances in Water Resources.The article was published on 2014-08-01. It has received 69 citations till now. The article focuses on the topics: Large eddy simulation & Cylinder (engine).read more
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The international river interface cooperative: Public domain flow and morphodynamics software for education and applications
Jonathan M. Nelson,Yasuyuki Shimizu,Takaaki Abe,Kazutake Asahi,Mineyuki Gamou,Takuya Inoue,Toshiki Iwasaki,Toshiki Iwasaki,Takaharu Kakinuma,Satomi Kawamura,Ichiro Kimura,Tomoko Kyuka,Richard R. McDonald,Mohamed Nabi,Makoto Nakatsugawa,Francisco R. Simões,Hiroshi Takebayashi,Yasunori Watanabe +17 more
TL;DR: A new, public-domain interface for modeling flow, sediment transport and morphodynamics in rivers and other geophysical flows, named after the International River Interface Cooperative (iRIC), is described including example calculations to serve as an aid for users choosing what approach might be most appropriate for their own applications.
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Influence of vegetation on spatial patterns of sediment deposition in deltaic islands during flood
TL;DR: In this article, a numerical flow and sediment transport model is used to determine how vegetation affects the spatial distribution of sediment transport and deposition on deltaic surfaces during flood, and it is shown that, for an intermediate value of relative vegetation height and density, sedimentation rate increases at the head of the delta.
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Numerical investigation of local scour around three adjacent piles with different arrangements under current
TL;DR: In this article, a set of three-dimensional numerical models were established to investigate the mechanisms of local scour around three adjacent piles with different arrangements under steady currents, and the results revealed that the dimensionless pile spacing has a significant effect on the flow field, bed elevation contours, and scour depth.
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Numerical simulation of bar and bank erosion in a vegetated floodplain: A case study in the Otofuke River
TL;DR: In this paper, the development of a meandering channel in a river, which was originally braided and currently vegetated, the Otofuke River in Japan, was investigated using a two-dimensional morphodynamic model.
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Physical modelling of local scour at twin piles under combined waves and current
TL;DR: In this paper, the effects of non-dimensional pile spacing and flow skew angle on the scour depth and time scale of scour around twin piles are intensively examined, and the empirical formula of dimensionless equivalent pile diameter as the function of G/D and α is established to predict the maximum scour depths at the twin piles.
References
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Journal ArticleDOI
General circulation experiments with the primitive equations
TL;DR: In this article, an extended period numerical integration of a baroclinic primitive equation model has been made for the simulation and the study of the dynamics of the atmosphere's general circulation, and the solution corresponding to external gravitational propagation is filtered by requiring the vertically integrated divergence to vanish identically.
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Equation of motion for a small rigid sphere in a nonuniform flow
Martin R. Maxey,James J. Riley +1 more
TL;DR: In this paper, the forces on a small rigid sphere in a nonuniform flow are considered from first prinicples in order to resolve the errors in Tchen's equation and the subsequent modified versions that have since appeared.
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An investigation of particle trajectories in two-phase flow systems
S. A. Morsi,A. J. Alexander +1 more
TL;DR: In this article, the authors describe a theoretical investigation into the response of a spherical particle to a one-dimensional fluid flow, and the motion of the spherical particle in a uniform 2D fluid flow about a circular cylinder.
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On coherent-vortex identification in turbulence
Yves Dubief,Franck Delcayre +1 more
TL;DR: In this paper, it was shown that the pressure Laplacian is positive within a low-pressure tube of small cross section enclosed by convex isobaric surfaces in a uniform density flow.