Incipient motion of gravel and coal beds

Dey, Subhasish ; Raju, Uddaraju V. (2002) Incipient motion of gravel and coal beds Sadhana : Academy Proceedings in Engineering Sciences, 27 (5). pp. 559-568. ISSN 0256-2499

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An experimental study on incipient motion of gravel and coal beds under unidirectional steady-uniform flow is presented. Experiments were carried out in a flume with various sizes of gravel and coal samples. The critical bed shear stresses for the experimental runs determined using side-wall correction show considerable disagreement with the standard curves. The characteristic parameters affecting the incipient motion of particles in rough-turbulent regime, identified based on physical reasoning and dimensional analysis, are the Shields parameter, particle Froude number, non-dimensional particle diameter and non-dimensional flow depth. Equations of critical bed shear stress for the initial movement of gravel and coal beds were obtained using experimental data. The method of application of critical bed shear stress equations is also mentioned.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Granular Material; Sedimentary Bed; Incipient Motion; Sediment Transport; Sediment Threshold; Fluvial Hydraulics
ID Code:79062
Deposited On:24 Jan 2012 07:31
Last Modified:18 May 2016 21:35

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