摘要:

The paper gives a detailed description of numerical and experimental analysis of a cavitation free flow about a single blade placed in a water tunnel as well as the comparison between both the methods.

ISSN:0022-1686    

DOI:10.1080/00221689509498680

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

Following suggestions from the literature that, in some cases, mud flow and debris flow may be treated in computations as viscous laminar flow, this paper contains test results compared with results obtained with a one-dimensional numerical model of a high-viscosity fluid wave on an inclined bottom. A gate that initially retained the fluid at the upstream end of a channel was quickly removed. The set up of the numerical model is discussed in detail. A finite difference scheme is applied. Viscous bottom friction is counted for. To overcome the discontinuity at the start of the break, the classical analytical solution of the zero-viscosity dam break wave on a horizontal bottom is introduced.

ISSN:0022-1686    

DOI:10.1080/00221689509498681

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

A Large Eddy Simulation of turbulent flow in a compound open channel with one floodplain is reported for a Reynolds number of approximately 42000. The results are in good agreement with experimental measurements and previous numerical calculations. The mean velocity field, secondary circulation field, bed stress distribution, and lateral stress distribution are presented in detail.

ISSN:0022-1686    

DOI:10.1080/00221689509498682

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

This paper presents the results of an experimental investigation carried out in the UK Flood Channel Facility into the hydraulics of overbank river flow (two-stage channels). This large experimental channel can accommodate models up to 60 m in length. The topic investigated here concerns straight river channels flanked by skewed floodplains. Angles of skew over the range 2° to 9° and overbank depth ratios from 0.15 to 0.49 were studied. Friction characteristics are derived from the measured stage-discharge curves and compared with the equivalent straight (unskewed) two-stage channels as well as simple trapezoidal ones. Distributions of both transverse and longitudinal velocity components as well as bed shear stress are presented and discussed. Inferred secondary circulation systems in the deep channel are proposed and related to the measured hydraulic characteristics of the flow.

ISSN:0022-1686    

DOI:10.1080/00221689509498683

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

Results of experimental investigation of the velocity and concentration vertical distribution through the flow, carrying, sand and grained coal particles in smooth and rough flumes with high solid particle concentration, ranging from 0.02 to 33%, are presented.

ISSN:0022-1686    

DOI:10.1080/00221689509498684

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

In this paper the instability of the flow gradually varying over a mobile bed has been studied. The results obtained show the influence of bedload transport on the stability of disturbances. The stability criteria have been given and examined in more detail. The one of Kranenburg for the flow over a fixed bed is considered as a special case. The numerical solutions of the amplitude evolution equation are given in some cases.

ISSN:0022-1686    

DOI:10.1080/00221689509498685

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

Buoyant upstream spreading forms part of the more or less radial spreading motion that occurs when a continuous buoyancy source exists within a weak ambient flow. Such buoyancy source may be located at the water surface, or bottom, or at a terminal level within an ambient density stratification, and follows the initial mixing phase of a pollutant discharge. The upstream spreading flow stagnates against the oncoming ambient flow, and is ultimately diverted in the downstream direction. The numerical solutions by Jones, Jirka and Caughey (1983) for the buoyant spreading flow with a drag-like arresting mechanism at the density front is used to predict the overall properties of the spreading motion for different ambient conditions. Data from laboratory experiments and from field observations are in good agreement with the model predictions.

ISSN:0022-1686    

DOI:10.1080/00221689509498686

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

Two high-resolution numerical schemes based on Lax-Friedrichs numerical flux and ENO type of extrapolation are presented for the computation of free-surface flows. The performances of these schemes are similar to other high-resolution (TVD and ENO) schemes. However, the ease of implementation makes the new method very attractive for practical applications. The first numerical scheme is afterwards modified to account for the presence of the bottom slope terms. Several applications are presented.

ISSN:0022-1686    

DOI:10.1080/00221689509498687

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

ISSN:0022-1686    

DOI:10.1080/00221689509498688

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

COMPARISON OF ENERGY DISSIPATION BETWEEN NAPPE AND SKIMMING FLOW REGIMES ON STEPPED CHUTESby Hubert Chanson, Journal of Hydraulic Research, Vol. 32, 1994, No. 2, pp. 213-218

ISSN:0022-1686    

DOI:10.1080/00221689509498689

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor