摘要:

Formulae have been derived which relate the equilibrium scour depth upstream of cylindricalbridge piers caused by horseshoe vortex systems to various flow parameters. Assumptionshave been made concerning the vortex size and shape during the scouring processand concerning the forces on particles within the scour hole.

ISSN:0022-1686    

DOI:10.1080/00221688009499564

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0022-1686    

DOI:10.1080/00221688009499565

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Although the velocity gradient,is a parameter common to almost all the phenomenlogicaltheories of turbulence and turbulent mixing, relatively few accurateevaluations of this factor have been made (3). Most experimental values of thevelocity gradient in turbulent flow have been determined indirectly by firstobtaining an experimental velocity profile and then graphically differentiating thisprofile. Thus,reflects errors made in measuring the velocity profile and errorsmade in obtaining the derivative of this profile by graphical techniques. Hence, theaccuracy ofand the subsequent mixing length and transfer coefficient calculationscould be improved if an experimental method of obtainingdirectly in fully-developed,two-dimensional, turbulent boundary layer flow were available. The devicewas calibrated in a rectangular duct, and the results clearly demonstrate the validityof the design and the feasibility of measuringdirectly and accurately.

ISSN:0022-1686    

DOI:10.1080/00221688009499566

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

An experimental investigation of vertical mixing induced by wind,or by a screen which moved horizontallyover the water surface, was carried out in a wind-wave channel similar to that of Wu [27].It was found that,in the wind-wave channel, the entrainment rate due to the shear stress, which wasexerted on the water surface by the moving screen, was two orders of magnitude smaller than the oneobtained in similar experiments, which were carried out in an annular tank by Kato & Phillips [11],Kantha [9], and Kantha et al [10].

ISSN:0022-1686    

DOI:10.1080/00221688009499567

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0022-1686    

DOI:10.1080/00221688009499568

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

A light point can be visualized upon the partition surface of two fluids. An optical system can follow the displacement of this point.

ISSN:0022-1686    

DOI:10.1080/00221688009499569

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

ROCKFILL IN HYDRAULIC ENGINEERING ROCKFILL IN HYDRAULIC ENGINEERINGby D. STEVENSON Edited by Elsevier Scientific Publishing Company, P.O. Box 330,Amsterdam, The Netherlands, 216 pages, US $ 44.00.

ISSN:0022-1686    

DOI:10.1080/00221688009499570

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0022-1686    

DOI:10.1080/00221688009499563

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor