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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 3 - WATER ENGINEERING AND CIVILIZATION : Flow Resistance in an Open Channel with Periodic Two-and Three-dimensional Square Roughness
Flow Resistance in an Open Channel with Periodic Two-and Three-dimensional Square Roughness
Author : Liany Hendratta, Terunori OHMOTO and Sukarno Tohirin
Effects of regularly arrayed square roughness on flow resistance and turbulent characteristics in an open channel have been investigated over a completely rough-bed with uniform stainless square ribs, where their heights were 5mm and 10mm. Detailed spatial measurements of streamwise and vertical velocity fluctuations were conducted using Particle Image Velocimetry (PIV) in a vertical plane along the completely rough bed surface. Experimental results indicated that flow resistance with three-dimensional square roughness is higher than that with two-dimensional square roughness, the maximum value of flow resistance appeared in transverse spacingd\k(transverse spacing\roughness height ratio)=1 and significant degrees of spatially regular variation in the time-averaged velocities were generated along the rough elements.
File Size : 4,059,329 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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