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- W808013667 abstract "The afflux at bridge constructions needs to be estimated accurately, to reduce the cost of flood protection. This paper reports an Indian study, where rational afflux-discharge relations for choked flows at bridge constrictions are derived from a mathematical model; they are applied to the accurate estimation of afflux. The drag coefficient and coefficient of pier-nose resistance for choked and unchoked flows are also evaluated; formulae for them are proposed, based on experiments conducted on bridge-pier models of different shapes and length-width ratios. It is found that the proposed afflux relations for choked and unchoked flows may be used to estimate the afflux rationally. Let F1, F2 and F3 be the respective Froude numbers upstream of the constriction, at the constriction and downstream of the constriction. Let F3L be the limiting value of F3, corresponding to critical flow at the constriction. Then the variation of the drag coefficient with F3/F3L may be used to obtain this coefficient for known downstream flow condition and constriction geometry for unchoked flow. The variation of the coefficient of pier-nose resistance with F1 may be used to obtain that coefficient for known discharge and shape of the pier nose for choked flow." @default.
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- W808013667 date "1998-10-01" @default.
- W808013667 modified "2023-09-22" @default.
- W808013667 title "A RATIONAL APPROACH FOR ESTIMATING AFFLUX AT BRIDGE CONSTRICTIONS" @default.
- W808013667 hasPublicationYear "1998" @default.
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