Mass transfer around a single soluble solid with different shapes buried in a packed bed and exposed to fluid flow

• Type: Chapter or Part of a Book
• Date: 2012

Authors

J.M.P.Q. Delgado (Author) FEUP

Book

Title: Single and Two-Phase Flows on Chemical and Biomedical Engineering

Pages: 196-232

ISBN: 9781608053476

Publisher: Bentham Science Publishers Ltd.

Indexing

Scopus - 0 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-008-D5S

DOI: 10.2174/978160805295011201010196

Abstract (EN): The present work describes the mass transfer process between a moving fluid and a soluble solid mass (a sphere, a cylinder or a plane surface aligned with the flow, a cylinder in cross-flow, a prolate spheroid and a oblate spheroid) buried in a packed bed of small inert particles with uniform voidage. Numerical solutions of the partial differential equations describing solute mass conservation were undertaken (for solute transport by both advection and diffusion) to obtain the concentration field in the vicinity of the soluble surface and the mass transfer flux was integrated to give the Sherwood number as a function of the relevant parameters (e.g., Peclet number, Schmidt number, aspect ratio of the soluble mass). Mathematical expressions are proposed that describe accurately the dependencies found. The solutions of these problems are useful in the analysis of a variety of physical situations, as in the analytical models of continuous injection of solute at a point source, in a uniform stream, to estimate the distance from the "contaminant source" beyond which the levels of contaminant are expected to fall below some safe limit.

Language: English

Type (Professor's evaluation): Scientific