Incipient motion design of sand bed channels affected by bed suction

Kumar, Bimlesh and Srinivasulu, Gopu and Rao, Achanta Ramakrishna (2010) Incipient motion design of sand bed channels affected by bed suction. In: Computers and Electronics in Agriculture, 74 (2). pp. 321-328.

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Abstract

Seepage through sand bed channels in a downward direction (suction) reduces the stability of particles and initiates the sand movement. Incipient motion of sand bed channel with seepage cannot be designed by using the conventional approach. Metamodeling techniques, which employ a non-linear pattern analysis between input and output parameters and solely based on the experimental observations, can be used to model such phenomena. Traditional approach to find non-dimensional parameters has not been used in the present work. Parameters, which can influence the incipient motion with seepage, have been identified and non-dimensionalized in the present work. Non-dimensional stream power concept has been used to describe the process. By using these non-dimensional parameters; present work describes a radial basis function (RBF) metamodel for prediction of incipient motion condition affected by seepage. The coefficient of determination, R-2 of the model is 0.99. Thus, it can be said that model predicts the phenomena very well. With the help of the metamodel, design curves have been presented for designing the sand bed channel when it is affected by seepage. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	Computers and Electronics in Agriculture
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Incipient motion; Metamodel; Radial basis function; Sediment transport; Seepage; Shields' diagram; Suction.
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	21 Dec 2010 11:19
Last Modified:	21 Dec 2010 11:19
URI:	http://eprints.iisc.ac.in/id/eprint/34583

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