Initiation of motion of coarse solitary particles on rough channel beds

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2009

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Küçüktepe, Ömer İlker

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In this study the incipient motion of coarse solitary particles on channel beds having different roughness heights was experimentally investigated. The experiments were conducted in a tilting flume of a rectangular cross-section having a working length of 12 m and a rough bed composed of at least 2 layers of coarse gravel of almost constant size. The roughness material of the channel bed was changed three times. The slope of the channel bed and the discharge are two main parameters that determine the initiation of motion of a given particle. The artificial particles tested in the experiments were obtained by mixing cement and iron dust at certain ratios. Dimensionless hydraulic parameters determined from theoretical analysis were related to each other. Flow depths, velocity profiles were measured and flow conditions that represent the critical conditions of initiation of motion were expressed in terms of critical velocities and shear velocities. The results were compared with the previous studies’ results.

Subject Keywords

Civil engineering.

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http://etd.lib.metu.edu.tr/upload/3/12611324/index.pdf
https://hdl.handle.net/11511/19190

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Ö. İ. Küçüktepe, “Initiation of motion of coarse solitary particles on rough channel beds,” M.S. - Master of Science, Middle East Technical University, 2009.