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한국수자원학회 / v.3, no.3, 2002년, pp.155-162 
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( FLUID-GRANULE MIXED FLOIW DOWNSTREAM OF SCOUR HOLE AT OUTLET OF HYDRAULIC STRUCTURE ) |
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| 초 록 |
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| This study presents the theoretical approach for volume concentration, velocity profile, and granular discharge on the fluid-granule mixed flow downstream of the scour hole at the outlet of the hydraulic structure. Concept of dilatant model was applied for the stress-strain relationships of fluid-granule mixed flow since the flow downstream of the scour hole corresponds to debris flow, where momentum transfers through particle collisions. Mathematical formulations were derived using momentum equation and stress-strain relation of the fluid-granule mixture. Velocity profile under the assumption of uniform concentration over flowing layer showed the downward convex type. Deposition angle of downstream hump was found to be a function of an upstream slope angle, a dynamic friction angle and a volume concentration irrespective of flow itself, Granular discharge and the overflow depth were obtained with given values of inflow rates. Experimental results showed relatively good agreements with theoretical ones. |
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| 키워드 |
| volume concentration;granular discharge;dilatant model;fluid-granule mixed flow; |
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Water Engineering Research / v.3, no.3, 2002년, pp.155-162
한국수자원학회
ISSN : 1229-6503
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921175041)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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