Circular Hydraulic Jump

Lawson, John D.; Phillips, Brett C

doi:10.1061/(asce)0733-9429(1983)109:4(505)

Cited by 21 publications

(9 citation statements)

References 4 publications

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“…The length of roller was experimentally found to be almost independent of F 1 as (Koloseus and Ahmad , 1969) (10 .12) Lawson and Phillips (1983) did not detect an effe ct of R r on L r . Ac cording to their experiments L r/h 2 increased slightly with Fl ' For 3 <F 1<9 the length of roller was confined to 2 .8<L r /h 2<4 .6 .…”

Section: Circular Jumpmentioning

confidence: 93%

“…Yet, their observations have no dire ct relevance to energy dissipation, and will not further be considered . Lawson and Phillips (1983) considered the approaching flow chara c-teristics by a numerical backwater curve computation. It was found that wall friction had a minor effect on the solution in the subcritical reg ion downstream of the jump , but i t significantly affected the supercritical approaching region .…”

Section: Circular Jumpmentioning

confidence: 99%

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Energy Dissipators and Hydraulic Jump

Hager

1992

Water Science and Technology Library

261

162

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I X 229 229 233 References Pa r t 2 No ta ti o n Pa rt 2 Subjec t Ind ex Aut ho r I n d ex 23 9 2 67 271 2 81 PREFACE Stilling basins utili z ing a hydraulic jump for energy dissipation are wi d e l y used in hydraulic engineering . Da Vinci was the first to describe the hydraulic jump, and Bidone conducted classical experiments about 170 years ago . Stilling basins we r e developed in the thirties with significant design improvements being made during the last sixty years . Although we l l -a c c e p t e d guidelines for a successful design are presently available, the information for the design of such dissipators is not yet compiled in book form .This book provides state-of-the-art information on hydraulic jumps and associat ed stilling basins . A large numbe r of papers on the to pics are reviewed. Th e present trends of the art of designing a stilli ng basin are discussed and ideas for future research are outlined. Design criteria and recommendat ions are frequently given . However, this should not be considered as a r eady-to -use guideline since the design of an effective stilling basin is much more comple x than following general design steps .The book is divided into two parts. Part 1 on hydraulic jumps is comprised of chapters 2 to 5. Part 2 consisting of chapters 6 to 14 deals with various hydraulic structures used to dissipate energy. The lists of notation and references are provided in each part separately although the same notation is u sed throughout. I wo u l d like to acknowledge the contributions of various persons: Professor D. Vischer, Director of VAW , encouraged me to prepar e this book and provid ed necessary facilities for this purpose . Dr . K . S c h r a m assisted me greatly in the preparation of the manuscript and Prof . M.H. Chaud hry reviewed it during his sabbatical leave at VAW . During my stay at the EPF L in Lausanne 1983-1988, I was involved wi t h the investigation of stilling basins . The assistance of Prof. R . Sinniger and the collaboration with my former PhD stud ents Dr . N.V. Bretz and Dr . R. Bremen are acknowledged . Discussions with Profs. R. Wanoschek, N. Rajaratnam and J.A. McCorquodale generated my interest in energy dissipation .

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Section: Circular Jumpmentioning

confidence: 93%

Section: Circular Jumpmentioning

confidence: 99%

Energy Dissipators and Hydraulic Jump

Hager

1992

Water Science and Technology Library

261

162

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“…In fact, the lateral walls exchange pressure forces with the flow, and the resultant depends on the free surface profile. For example, Hager [18] estimates the wall force using the average of the squared sequent depths as the mean squared depth, while Lawson and Phillips [19] assume that the flow depth varies linearly between the two sequent depths. Although such estimations can work well for engineering purposes, the theory presented here is intended to retain the conservation properties of the physical system at the simplest order of approximation possible.…”

Section: Physical Remarks and Basic Assumptionsmentioning

confidence: 99%

Linear and angular momentum conservation in hydraulic jump in diverging channels

Valiani¹,

Caleffi²

2011

Advances in Water Resources

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“…Also, he obtained that the length characteristics were nearly independent of the width ratio and had the same order of magnitude as in prismatic channels. Lawson and Phillips [25] used the momentum analysis of Koloseus and Ahmad (1969), Arbhabhirama and Abella [26] and France (1981) adopted to obtain a suitable circular hydraulic jump equation. The results showed that the length of the circular hydraulic jump was found to be considerably less than that of a corresponding rectangular hydraulic jump.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of Hydraulic Jump in a Gradually Expanding Rectangular Stilling Basin with Roughened Bed

Hassanpour

Dalir

Farsadizadeh

et al. 2017

Water

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Abstract:The paper presents the results of an experimental study carried out to investigate the effect of geometric and hydraulic parameters on energy dissipation and location of the hydraulic jump, with a change in the height of roughness elements and the divergence of walls in different discharges. Experiments were conducted in a horizontal rectangular basin with gradual expansion 0.5 m wide and 10 m long. Four physical models were fixed in the flume. The measured characteristics of the hydraulic jump with different divergences ratio (B = b 1 /b 2 = 0.4, 0.6, 0.8, 1) and the inflow Froude numbers (6 < Fr 1 < 12) were compared with each other and with the corresponding values measured for the classical hydraulic jump. The results showed that the tailwater depth required to form a hydraulic jump and also the roller length of the hydraulic jump and the length of the hydraulic jump on a gradual expansion basin with the rough bed were appreciably smaller than that of the corresponding hydraulic jumps in a rectangular basin with smooth and rough bed. With the experimental data, empirical formulae were developed to express the hydraulic jump characteristics relating to roughness elements height and divergence ratio of wall. Also, the applicability of some empirical relationships for estimating the roller length was tested.

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Circular Hydraulic Jump

Cited by 21 publications

References 4 publications

Energy Dissipators and Hydraulic Jump

Energy Dissipators and Hydraulic Jump

Linear and angular momentum conservation in hydraulic jump in diverging channels

An Experimental Study of Hydraulic Jump in a Gradually Expanding Rectangular Stilling Basin with Roughened Bed

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