EXPERIMENTAL STUDY OF A RELATIVELY WEEK DENSITY JUMP ON SMOOTH AND ROUGH BEDS

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BARAHMAND N.; SHAMSAEI A.A.F.; GHOMSHI M.

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ISSN: 2588-4824

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Journal: Journal of Water Resources Engineering Year:2009 | Volume:2 | Issue:4 Page(s): 43-56

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Title

EXPERIMENTAL STUDY OF A RELATIVELY WEEK DENSITY JUMP ON SMOOTH AND ROUGH BEDS

Author(s)

BARAHMAND N. | SHAMSAEI A.A.F. | GHOMSHI M. | Issue Writer Certificate

Keywords

DENSITY JUMPQ3

VELOCITY AND VOLUMETRIC CONCENTRATION PROFILESQ3

RELATIVE ROUGHNESSQ2

ENTRAINMENT RATIOQ2

DENSIMETRIC FROUDE NUMBERQ2

Abstract

Management of the DENSITY JUMPs in lakes and reservoirs plays an important role in the water quality improvement and in the sediment deposition and erosion management. The DENSITY JUMP was studied experimentally by considering the bed roughness. Experiments were performed in a rectangular laboratory flume having a gravel bed. Using the collected data, a simple relationship was obtained for estimating the conjugate depth ratio in relatively weak jumps. The conjugate depth ratio is independent of the ENTRAINMENT RATIO, and depends only in this relation on the upstream DENSIMETRIC FROUDE NUMBER and the RELATIVE ROUGHNESS. For smooth beds, the spatial development of the density current was also analyzed in both supercritical and subcritical flow regimes. As the distance from the end of the jump increased, the maximum velocity drifted towards the bed. Finally, at a distance approximately fold h2 from the end of the jump, the non-dimensional vertical distribution of mean velocity had a shape similar to that of the supercritical section.

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APA: Copy

BARAHMAND, N., SHAMSAEI, A.A.F., & GHOMSHI, M.. (2009). EXPERIMENTAL STUDY OF A RELATIVELY WEEK DENSITY JUMP ON SMOOTH AND ROUGH BEDS. WATER ENGINEERING, 2(4), 43-56. SID. https://sid.ir/paper/169587/en

Vancouver: Copy

BARAHMAND N., SHAMSAEI A.A.F., GHOMSHI M.. EXPERIMENTAL STUDY OF A RELATIVELY WEEK DENSITY JUMP ON SMOOTH AND ROUGH BEDS. WATER ENGINEERING[Internet]. 2009;2(4):43-56. Available from: https://sid.ir/paper/169587/en

IEEE: Copy

N. BARAHMAND, A.A.F. SHAMSAEI, and M. GHOMSHI, “EXPERIMENTAL STUDY OF A RELATIVELY WEEK DENSITY JUMP ON SMOOTH AND ROUGH BEDS,” WATER ENGINEERING, vol. 2, no. 4, pp. 43–56, 2009, [Online]. Available: https://sid.ir/paper/169587/en

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