Results 121 to 130 of about 7,208 (162)

Flows above oscillatory ripples

Sedimentology, 1980
ABSTRACTThe flows above ripples of glass beads and ripple models have been visualized in an oscillatory water tunnel. Some ripples were observed to form without flow separation. Two types of vortices, the standing vortices without flow separation and the separation vortices have been observed, and their similarity is discussed.
H. HONJI, A. KANEKO, N. MATSUNAGA
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Transient ripples in oscillatory flows

Continental Shelf Research, 2005
Abstract Laboratory measurements are reported of the change in ripple profile with time in response to a step change in flow conditions. The ripples were formed in beds of sand in an oscillating tray rig. Spectra of the bed profiles were obtained with a miniature echo sounder traversed over the bed.
Daniel Smith, John F.A. Sleath
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Google+Ripples

Proceedings of the 22nd international conference on World Wide Web, 2013
G+ Ripples is a visualization of information flow that shows users how public posts are shared on Google+. Unlike other social network visualizations, Ripples exists as a "native" visualization: it is directly accessible from public posts on Google+. This unique position leads to both new constraints and new possibilities for design.
Fernanda B. Viégas, Martin Wattenberg, Jack Hebert, Geoffrey Borggaard, Alison Cichowlas, Jonathan Feinberg, Jon Orwant, Christopher Richard Wren   +7 more
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Ripple Effect Analysis of Data Flow Requirements

Proceedings of the 14th International Conference on Software Technologies, 2019
Ripple effect in the modification of software requirements should be properly analyzed, since it may cause errors of software requirements. We have already proposed a ripple effect analysis method in deletion or update of data flow requirements.
Bui Do Tien Hung, Takayuki Omori, Atsushi Ohnishi   +2 more
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Oscillating flows over periodic ripples

Journal of Fluid Mechanics, 1990
Oscillating flows over periodic ripples are of practical as well as scientific interest because of their relevance to beach processes. When either the ripples are sufficiently steep or the amplitude of ambient oscillations large, streamlines of a viscous flow are no longer parallel to the ripple surface.
Hara, Tetsu, Mei, Chiang C.
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Mechanics of flow over ripples and dunes

Journal of Geophysical Research: Oceans, 1989
A simple predictive model for velocity and boundary shear stress fields over two‐dimensional bedforms of finite amplitude is presented herein, and the results of that model are compared with flume data. The production of a wake due to separation of the flow near the bedform crest and the subsequent interaction of this wake region with a developing ...
Jonathan M. Nelson, J. Dungan Smith
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Ripples in the Universal Hubble Flow

Physics Today, 1987
Large streaming velocities indicate bulk motions on scales as large as superclusters—clusters of clusters of galaxies—in addition to a smooth cosmological Hubble expansion. The existence of such motion has long been controversial. “None of the standard models can easily explain streaming,” says Jeremiah Ostriker (Princeton).
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Effects of Rotation on the Oscillatory Flow Over Ripples

2015
Large-eddy simulations (LES) of oscillating turbulent boundary layers, over a rippled bed, subjected to frame rotation are presented. This flow is archetypal of a bottom-ocean, tidally driven boundary layer developing over sand dunes. A forcing-type immersed boundary method (IBM) is used to represent the solid bed and the filtered structure function ...
Grigoriadis, D. G. E., Armenio, V., Grigoriadis, D. G. E., Armenio, V.   +3 more
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Substitutes, complements, and ripples in multicommodity flows on suspension graphs

Networks, 2014
We examine in this article when it is possible to predict, without numerical computation, the direction of change of optimal multicommodity flows on suspension graphs resulting from changes in arc‐commodity parameters. Using results of Evans (Oper Res 26 (1978), 673–679) and of Soun and Truemper (SIAM J Algebr Discrete Meth 1 (1980), 348–358), the ...
Iara Ciurria-Infosino, Frieda Granot, Arthur F. Veinott Jr.   +2 more
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Pickup from Rippled Beds in Oscillatory Flow

Journal of Waterway, Port, Coastal, and Ocean Engineering, 2002
Measurements are reported of sediment pickup rates from rippled beds in an oscillatory-flow water tunnel. Two maxima in pickup rate are observed in each half-cycle: The first corresponds to the sediment entrained at flow reversal, and the second occurs close to maximum flow velocity.
John F. A. Sleath, S. Wallbridge
openaire   +1 more source