منابع مشابه
Bubbly flow structure in hydraulic jump
In an open channel, a hydraulic jump is the rapid transition from superto sub-critical flow associated with strong turbulence and air bubble entrainment in the mixing layer. New experiments were performed at relatively large Reynolds numbers using phase-detection probes. Some new signal analysis provided characteristic air–water time and length scales of the vortical structures advecting the ai...
متن کاملThe mean and turbulent flow structure of a weak hydraulic jump
S. K. Misra, J. T. Kirby, M. Brocchini, F. Veron, M. Thomas, and C. Kambhamettu Center for Applied Coastal Research, University of Delaware, Newark, Delaware 19716, USA Istituto di Idraulica e Infrastrutture, Universit Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy Graduate College of Marine Studies, University of Delaware, Newark, Delaware 19716, USA Department of Computer a...
متن کاملThe flow field downstream of a hydraulic jump
A control-volume analysis of a hydraulic jump is used to obtain the mean vorticity downstream of the jump as a function of the Froude number. To do this it is necessary to include the conservation of angular momentum. The mean vorticity increases from zero as the cube of Froude number minus one, and, in dimensionless form, approaches a constant at large Froude number. Digital particle imaging v...
متن کاملCharacteristics of Hydraulic Jump
The effect of an abruptly expanding channel on the main characteristics of hydraulic jump is considered experimentally. The present study was made for supercritical flow of Froude number varying between 2 to 9 and approach to expanded channel width ratios 0.4, 0.5, 0.6 and 0.8. Physical explanations of the variation of these characteristics under varying flow conditions are discussed based on t...
متن کاملBubbly Two-Phase Flow in Hydraulic Jumps at Large Froude Numbers
A hydraulic jump is a sudden, rapid transition from a supercritical flow to a subcritical flow. At large inflow Froude numbers, the jump is characterized by a significant amount of entrained air. For this paper, the bubbly two-phase flow properties of steady and strong hydraulic jumps were investigated experimentally. The results demonstrate that the strong air entrainment rate and the depth-av...
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ژورنال
عنوان ژورنال: European Journal of Mechanics - B/Fluids
سال: 2007
ISSN: 0997-7546
DOI: 10.1016/j.euromechflu.2006.08.001