Computations of curved free surface water flow on spiral concentrators

被引:23
作者
Matthews, BW [1 ]
Fletcher, CAJ
Partridge, AC
Vasquez, S
机构
[1] Univ New S Wales, Ctr Adv Numer Computat Engn & Sci, Sydney, NSW 2052, Australia
[2] Univ New S Wales, Sch Min Engn, Sydney, NSW 2052, Australia
[3] Fluent Inc, Lebanon, NH 03766 USA
来源
JOURNAL OF HYDRAULIC ENGINEERING-ASCE | 1999年 / 125卷 / 11期
关键词
D O I
10.1061/(ASCE)0733-9429(1999)125:11(1126)
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Spiral concentrators, consisting of an open trough that twists vertically downward about a central axis, are used to separate radially a thin-film slurry of mineral and waste material on the basis of particle density and size. This paper reports the derailed steady and uniform flow results of a computational fluid dynamics model for the water phase. The flow is characterized by a free surface, shallow (1-14 mm) depths, radial transition to fully turbulent flow, and superimposed secondary motion. Validated results are presented for depths and primary and secondary velocity components, both internally and on the free surface. A detailed understanding of the flow behavior beyond that readily available by experimentation on the concentrator has been gleaned. More importantly, an efficient and fully predictive computational fluid dynamics methodology is demonstrated for the class of problems represented by the example, having wider relevance for hydraulic open channel applications. The model solves the Reynolds-averaged Navier-Stokes equations and employs the volume of fluid free surface method, isotropic k-epsilon and Renormalization Group k-epsilon turbulence formulations, and the wall function approach.
引用
收藏
页码:1126 / 1139
页数:14
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