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Experiments on two-phase flow in hydraulic jump on pebbled rough bed: Part 2–Bubble clustering
Water Science and Engineering, 2023 A survey on bubble clustering in air–water flow processes may provide significant insights into turbulent two-phase flow. These processes have been studied in plunging jets, dropshafts, and hydraulic jumps on a smooth bed.
Farhad Bahmanpouri +2 more
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Computational fluid dynamics simulation of rough bed open channels using openFOAM
Frontiers in Environmental Science, 2022 With increased flood risk due to climate change, population expansion and urbanisation; robust waterway design and management are critical. One common type of waterway used to gather and transport ground water is the open channel. Most simulations do not
Yun-Hang Cho +3 more
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Archives of Mechanics, 2023 The usual cellular pattern of the time averaged secondary flow circulation in the central section of wide open channels shows a distorted (laterally or vertically) structure due to the changes in bed configurations along lateral direction. The structures
T. Chattopadhyay, S. Kundu
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Equivalent Roughness of Gravel-Bed Rivers [PDF]
Journal of Hydraulic Engineering, 2008 The relation between the equivalent roughness and different grain size percentiles of the sediment in gravel-bed rivers was determined under the hypothesis that the vertical distribution of the flow velocity follows a logarithmic law. A set of 954 data points was selected from rivers with gravel size sediment or larger, with a non-sinuous alignment and
López Alonso, Raúl +1 more
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Sequent depth ratio of B-jumps on smooth and rough beds
Journal of Agricultural Engineering, 2013 A hydraulic B-jump has the toe section located on a positively sloping upstream channel and the roller end on a downstream horizontal channel. This paper analyses the B-jump on a rough bed, such as at the transition from a block ramp to the stilling ...
Francesco Giuseppe Carollo +2 more
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Shanghai Jiaotong Daxue xuebao, 2021 In both the natural environment and hydraulic engineering, there widely exists the phenomenon of gravity current. In practical conditions, most beds are covered with gravel and sediment particles of different sizes, which can be regarded as rough bed ...
HAN Dongrui +5 more
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Fluids, 2021 In nature, environmental and geophysical flows frequently encounter submerged cylindrical bodies on a rough bed. The flows around the cylindrical bodies on the rough bed are very complicated as the flow field in these cases will be a function of bed ...
Kalpana Devi +3 more
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Simulation of hydraulic jump length on sloping coarse floors adopting extreme learning machine [PDF]
Journal of Applied Research in Water and Wastewater, 2020 In this paper, the hydraulic jump length on a slope rough floor is simulated through the extreme learning machine (ELM). Then, the parameters affecting the hydraulic jump on the slope rough bed are detected.
Amir Hosein Azimi +2 more
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On gravel‐bed roughness characterization [PDF]
Water Resources Research, 1998 The random field approach for gravel‐bed roughness characterization, which is based on the presentation of bed elevations as a three‐dimensional random field, is justified as an alternative to the characteristic particle size approach. We first show that the bed elevation distribution is close to Gaussian and then investigate gravel‐bed roughness using
Vladimir I. Nikora +2 more
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Sand bed roughness in the nearshore [PDF]
Journal of Geophysical Research: Oceans, 2003 Measurements made using sonar altimeters mounted on an amphibious surveying vehicle are analyzed for root‐mean‐square (RMS) bedform roughness. Observations for 22 days over a 500 m × 700 m area are used to quantify the cross‐shore distribution of roughness and its variability. Large bedforms (with amplitudes 5–50 cm) occur frequently in shallow water (&
Edith L. Gallagher +2 more
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