EFFECT OF ROUGHNESS SHAPE ON THE SEQUENT DEPTH RATIO OF HYDRAULIC JUMP

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SHAFAI BEJESTAN M.; NICI K.

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Paper Information

Journal: WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE) Year:2010 | Volume:19.1 | Issue:2 Page(s): 165-176

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Information Journal Paper

Title

EFFECT OF ROUGHNESS SHAPE ON THE SEQUENT DEPTH RATIO OF HYDRAULIC JUMP

Author(s)

SHAFAI BEJESTAN M. | NICI K. | Issue Writer Certificate

Keywords

HYDRAULIC JUMPQ4

ROUGHNESS ELEMENTSQ4

SEQUENT DEPTHQ4

STILLING BASINQ4

Abstract

In this study, t he effect of shape of ROUGHNESS ELEMENTS on the bed shear stress and SEQUENT DEPTH of HYDRAULIC JUMP have been investigated. Experiments are conducted in a rectangular flume 0f 7.5 m long and 0.3 m wide in the hydraulic laboratory of Shahid Chamran University, Ahwaz, Iran. For the purpose of this study, prismatic ROUGHNESS ELEMENTS with different shapes: rectangular, triangular, circular, lozenge and hexangular were tested. The roughened elements are glued on the bed of flume downstream of ogee spillway in such a way that the incoming water jet is just above the element surface. The incoming Froude number was in the range of 4.5 to 12. During each tests the water surface profile, the roller length and the jump length were measured. In few tests the longitudes and vertical flow velocity were measured. The results indicated that the presence of rough elements can reduce the SEQUENT DEPTH ratio.The amount of reduction would depend on the Froude number and the roughness shape. The triangular element can produce lesser SEQUENT DEPTH ratio.Relations have been presented in this study for the SEQUENT DEPTH of HYDRAULIC JUMP and shear force coefficient of bed as a function of the Froude number for each roughness shape.

Cites

INFLUENCE OF SILL AND ARTIFICIAL ROUGHNESS OVER ADVERSE BED SLOPES ON HYDRAULIC JUMP CHARACTERISTICS

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APA: Copy

SHAFAI BEJESTAN, M., & NICI, K.. (2010). EFFECT OF ROUGHNESS SHAPE ON THE SEQUENT DEPTH RATIO OF HYDRAULIC JUMP. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), 19.1(2), 165-176. SID. https://sid.ir/paper/147816/en

Vancouver: Copy

SHAFAI BEJESTAN M., NICI K.. EFFECT OF ROUGHNESS SHAPE ON THE SEQUENT DEPTH RATIO OF HYDRAULIC JUMP. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE)[Internet]. 2010;19.1(2):165-176. Available from: https://sid.ir/paper/147816/en

IEEE: Copy

M. SHAFAI BEJESTAN, and K. NICI, “EFFECT OF ROUGHNESS SHAPE ON THE SEQUENT DEPTH RATIO OF HYDRAULIC JUMP,” WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), vol. 19.1, no. 2, pp. 165–176, 2010, [Online]. Available: https://sid.ir/paper/147816/en

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