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You are here : eLibrary : IAHR World Congress Proceedings : 32nd Congress - Venice (2007) : THEME A: Engineering and Management of Fresh-water Systems : Study on longitudinal dispersion coefficient in trapezoidal cross-section open channels
Study on longitudinal dispersion coefficient in trapezoidal cross-section open channels
Author : Yongcan Chen and Z. Dejun
Based on the maximum entropy principle, a velocity formula was derived to describe the variation of longitudinal velocity in both the vertical and transverse directions in a trapezoidal cross-section open channel. Influence of transverse and vertical velocity profiles on longitudinal dispersion was studied, and conclusions in fair agreement with the work of other researchers were drawn. Finally a formula for predicting the longitudinal dispersion coefficient in trapezoidal cross-section open channels was proposed. According to the formula, the longitudinal dispersion coefficient is determined by two parameters which reflect the inhomogeneity of velocity distribution and the influence of channel walls. The method on longitudinal dispersion coefficient prediction in this essay is not based on some special experimental results or field data. Because of the solid theoretical basis, this method can be used as an efficient tool for determining the longitudinal dispersion coefficient in any straight symmetrical trapezoidal cross-section open channels.
File Size : 97,517 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 32nd Congress - Venice (2007)
Article : THEME A: Engineering and Management of Fresh-water Systems
Date Published : 01/07/2007
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