Volume 18, Number 67 (Spring 2014)                   JWSS 2014, 18(67): 165-174 | Back to browse issues page


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N. Pourabdollah, T. Honar, R. Fatahi. The Influence of Roughness in Adverse Bed Slopes on Conjugate Depth and Energy Losses of Hydraulic Jump. JWSS. 2014; 18 (67) :165-174
URL: http://jstnar.iut.ac.ir/article-1-2084-en.html

Abstract:   (3352 Views)
Most of researches related to hydraulic jump have been done on horizontal and rough beds, and little attempt has been made on rough beds with adverse slopes. The aim of this study was to investigate the influence of rough beds with adverse slope on hydraulic jump characteristics. The variations of energy loss in stilling basins with three adverse slopes and three different roughnesses were studied. Results showed that increase of roughness caused that relative depth of jump in stilling basins with rough bed and adverse slope decreased as compared to horizontal smooth beds. The experiments were performed on rough beds in different conditions where Froude number ranging between 4.9 and 7.8. Result showed that reduction of relative depth was about 31.15%. Results also showed that in such cases the relative energy losses are more than that for classic conditions.
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Type of Study: Research | Subject: Ggeneral
Received: 2012/04/8 | Accepted: 2012/11/6 | Published: 2014/06/7

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