Article ID Journal Published Year Pages File Type
155572 Chemical Engineering Science 2012 11 Pages PDF
Abstract

An engineering model of the particle diffusivity in horizontal hydraulic conveying pipelines is developed. The model is based on a known equation of the turbulent diffusivity for isotropic turbulence. The Kolmogoroff turbulence model is employed. It is assumed that turbulence develops in an equivalent fluid, representing a solid–liquid suspension. The particle diffusivity model takes into account a diffusivity increase with both the particle size and the mean solids concentration. The model has two empirical parameters, which are identified from the experimental data available in the literature. A comparison of the computed solids concentration distributions over the pipe cross-section with those measured demonstrates a high model accuracy in a wide range of slurry flow parameters.

► We model particle diffusivity in a horizontal hydrotransport pipeline. ► The model accounts for both the particle size and the solids concentration. ► The model has only two empirical parameters. ► Computed solids concentration profiles are in a good agreement with those measured.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
Authors
,