Print Email Facebook Twitter Diffusion of sediment in a non-uniform flow field Title Diffusion of sediment in a non-uniform flow field Author Apmann, R.P. Rumer, R.R. Corporate name TU Delft Date 1967-12-01 Abstract The suspension of sediment particles by turbulent eddy diffusion in a non- uniform flow region was studied, using the convective-diffusion equation as a mathematical model. A simplified form of the equation for which mixing characteristics and flow velocities 'vere assumed uniform was found to accurately describe the sediment concentration profiles which had been measured in a 24-foot long flume. The experiments also showed that turbulent mixing was more uniform than predicted by existing theories, and that it depended on the geometric characteristics of the mobile, wavy bed. Although diffusivities in the non- uniform region tended towards uniformity with downstream distance the vertical diffusive transport rate was related to depth as a power law function. An expression with analytic support was derived for the diffusion coefficients as functions of sediment and hydraulic variables. Subject diffusionsedimentwaves Classification TKJ3000 To reference this document use: http://resolver.tudelft.nl/uuid:70f8d358-2ae8-4794-bdc9-4f2b6a17aa53 Publisher State University of New York Source Civil Eng. report 16, sponsored by US dept. of Agriculture, Agricultural Research Service Part of collection Hydraulic Engineering Reports Document type report Rights © 1967 Authors Files PDF appman-rumer1967.pdf 45.97 MB Close viewer /islandora/object/uuid:70f8d358-2ae8-4794-bdc9-4f2b6a17aa53/datastream/OBJ/view