Numerical Study of an Unsteady Confined Jet. Application to Crossflow Filtration

[+] Author and Article Information
C. Maranges, C. Fonade

Institut National des Sciences Appliquées, Centre de Bioingénierie G. Durand (URA CNRS 544, L.A. INRA), Complexe Scientifique de Rangueil, F31077 Toulouse Cedex, France

G. Arroyo

Centre National du Machinisme Agricole, Division Technologie, 17 avenue de Cucillé, F35044 Rennes Cedex, France

J. L. Estivalezes

CERT-ONERA, Dpt de mécanique et energétique des systèmes, 2 avenue E. Belin, F31055 Toulouse Cedex, France

J. Fluids Eng 118(1), 74-80 (Mar 01, 1996) (7 pages) doi:10.1115/1.2817517 History: Received July 15, 1994; Revised November 06, 1995; Online December 04, 2007


This paper deals with the influence of a new flow unsteadiness on the permeate flux in crossflow filtration. A pneumatically controlled valve generates intermittent jets from the main flow, leading to the formation of large vortices moving downstream along the tubular membrane. A numerical calculation of this flow is achieved using a finite difference scheme. Influences of tube diameter and jet velocities are discussed. Application of this technique is carried out by filtering a bentonite suspension through an ultrafiltration membrane.

Copyright © 1996 by The American Society of Mechanical Engineers
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