Turbulent advances of a breaking bore: preliminary physical experiments
Xinqian Leng,Hubert Chanson +1 more
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TLDR
In this paper, the authors studied the breaking bore roller toe in a large canal with a focus on breaking bearing roller propagation and found that the toe perimeter shape fluctuated rapidly with transverse distance and time, although in a quasi-two-dimensional manner.About:
This article is published in Experimental Thermal and Fluid Science.The article was published on 2015-04-01 and is currently open access. It has received 24 citations till now. The article focuses on the topics: Tidal bore & Leading edge.read more
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Direct numerical simulation of a turbulent hydraulic jump: turbulence statistics and air entrainment
TL;DR: In this article, the authors presented a direct numerical simulation of a stationary turbulent hydraulic jump with inflow Froude number of 2, Weber number of 1820 and density ratio of 831, consistent with ambient water-air systems, all based on the inlet height and inlet velocity.
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Coupling between free-surface fluctuations, velocity fluctuations and turbulent Reynolds stresses during the upstream propagation of positive surges, bores and compression waves
Xinqian Leng,Hubert Chanson +1 more
TL;DR: In this paper, a large-size rectangular channel was used to characterize the unsteady turbulent properties, including the coupling between free-surface and velocity fluctuations, during the passage of a positive surge.
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Are breaking waves, bores, surges and jumps the same flow?
TL;DR: In this paper, a review of the different analogies proposed in the literature and to discuss current practices is presented, and a discussion is developed an aimed at improving the use of possible breaking proxies.
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Tidal bore hydrodynamics and sediment processes: 2010–2016 field observations in France
TL;DR: In this article, a comprehensive review of field data further shows that the tidal bore occurrence has a marked effect on the velocity field and suspended sediment processes, including a sudden flow deceleration and flow reversal during the bore passage.
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Upstream Propagation of Surges and Bores: Free-Surface Observations
Xinqian Leng,Hubert Chanson +1 more
TL;DR: In a free-surface flow, a sudden increase in water depth induces a positive surge, also called compression wave or bore as mentioned in this paper, and a physical study was conducted in relatively large-size rectangular c...
References
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Bubbly flow structure in hydraulic jump
TL;DR: In this article, the authors used phase-detection probes to study the air-water flow in an open channel and found that the transverse integral length scale Z/d1 of the eddies advecting entrained bubbles was typically between 0.25 and 0.4.
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Free-surface fluctuations and turbulence in hydraulic jumps
Yann Chachereau,Hubert Chanson +1 more
TL;DR: In this paper, the free-surface fluctuations and air-water properties of the hydraulic jump roller were investigated physically for relatively small Froude numbers (2.4 < Fr-1 < 5.1) and relatively large Reynolds numbers (6.6 x 10(4) < Re < 1.3x 10(5)).
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Air–water interface dynamic and free surface features in hydraulic jumps
TL;DR: In this paper, two new free surface wire gauges (thin wires, φ = 0.05 mm, 1mm apart) have been built and calibrated to obtain accurate measurements of free surface fluctuations with frequency resolution up to 12 Hz.
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Momentum Considerations in Hydraulic Jumps and Bores
TL;DR: In this article, the effects of the cross-sectional shape and bed friction on a hydraulic jump are investigated, and the effect of the flow resistance yields a smaller ratio of conjugate cross-section areas for a given Froude number.