Equivalent Roughness of Submerged Obstacles in Open-Channel FlowsSource: Journal of Hydraulic Engineering:;2014:;Volume ( 140 ):;issue: 002Author:George C. Christodoulou
DOI: 10.1061/(ASCE)HY.1943-7900.0000801Publisher: American Society of Civil Engineers
Abstract: Experimental results for flow in a 16.5% sloping channel over various kinds of submerged artificial large-scale roughness elements are presented. Eight different shapes of obstacles are tested, as follows: (1) standard baffle blocks, (2) cubes, (3) half-cubes, (4) angles, (5) cylinders, (6) vertical rods, (7) hemispheres parallel to the flow, and (8) hemispheres normal to the flow. Based on depth measurements, the effective Manning’s coefficient is determined and the respective equivalent sand roughness is evaluated. The results are given in nondimensional terms and compared with previous research. The effects of shape, size, and density of the obstacles on flow resistance are discussed.
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| contributor author | George C. Christodoulou | |
| date accessioned | 2017-05-08T21:51:54Z | |
| date available | 2017-05-08T21:51:54Z | |
| date copyright | February 2014 | |
| date issued | 2014 | |
| identifier other | %28asce%29hy%2E1943-7900%2E0000833.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/64670 | |
| description abstract | Experimental results for flow in a 16.5% sloping channel over various kinds of submerged artificial large-scale roughness elements are presented. Eight different shapes of obstacles are tested, as follows: (1) standard baffle blocks, (2) cubes, (3) half-cubes, (4) angles, (5) cylinders, (6) vertical rods, (7) hemispheres parallel to the flow, and (8) hemispheres normal to the flow. Based on depth measurements, the effective Manning’s coefficient is determined and the respective equivalent sand roughness is evaluated. The results are given in nondimensional terms and compared with previous research. The effects of shape, size, and density of the obstacles on flow resistance are discussed. | |
| publisher | American Society of Civil Engineers | |
| title | Equivalent Roughness of Submerged Obstacles in Open-Channel Flows | |
| type | Journal Paper | |
| journal volume | 140 | |
| journal issue | 2 | |
| journal title | Journal of Hydraulic Engineering | |
| identifier doi | 10.1061/(ASCE)HY.1943-7900.0000801 | |
| tree | Journal of Hydraulic Engineering:;2014:;Volume ( 140 ):;issue: 002 | |
| contenttype | Fulltext |