Paper Details

[ Downloads: 0 | Abstract Viewed: 77 | Pages: 8 ]

Abstract of the Article

Note: English CIVILICA is in its Trial Period so Full Texts can not be provided! Persian users can download it here

A Laboratory Study of Longitudinal Velocity Distribution in a 180-Degree Bend with Rigid Boundaries

Authors:
[ Abdesharif Esfahany ] - School of Soil & Water Engineering, Faculty of Agriculture & Natural Resource University of Tehran
[ Amiri Tokaldany ] - School of Soil & Water Engineering, Faculty of Agriculture & Natural Resource University of Tehran
[ Farhoudi ] - School of Soil & Water Engineering, Faculty of Agriculture & Natural Resource University of Tehran

Abstract:

Physical and mathematic models are usually used to estimate the river reaction against any perturbation inside river. Using of mathematic models in different aspects of river engineering needs full understanding flow properties in non-straight streams. In this research, a laboratory model of 3.5m radius of center line curvature, 1m width and 180-degree angle, had been constructed. Using an Acustic Doppler Velocimeter (ADV) the longitudinal flow velocity for the discharge of 37.5 lps. had been measured to compare the ability several models of bend flow; e.g. Rozovskii (1961), Kikkawa et al (1976), Johannesson and Parker (1989) and Bridge (1992). It is found that the model of Johannesson and Parker (1989) had better agreement to predict the longitudinal velocity in a bend with rigid boundaries.

Keywords:

Curved Channel, Mathematic Models, ADV, Longitudinal Velocity