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Titolo:
Hydrodynamics of slug flow applied to cross-flow filtration in narrow tubes
Autore:
Mercier-Bonin, M; Maranges, C; Lafforgue, C; Fonade, C; Line, A;
Indirizzi:
LA INRA, CNRS, UMR 5504, Lab Biotechnol Bioprocedes,Inst Natl Sci Applique, F-31077 Toulouse, France LA INRA Toulouse France F-31077 l Sci Applique, F-31077 Toulouse, France Inst Natl Sci Appl, Lab Ingn & Procedes Environm, F-31077 Toulouse 4, France Inst Natl Sci Appl Toulouse France 4 nvironm, F-31077 Toulouse 4, France
Titolo Testata:
AICHE JOURNAL
fascicolo: 3, volume: 46, anno: 2000,
pagine: 476 - 488
SICI:
0001-1541(200003)46:3<476:HOSFAT>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLUX ENHANCEMENT; ULTRAFILTRATION FLUX; TUBULAR MEMBRANES; PERMEATE FLUX; CELL-RECYCLE; MICROFILTRATION; FERMENTATION; IMPROVEMENT; SUSPENSIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Mercier-Bonin, M LA INRA, CNRS, UMR 5504, Lab Biotechnol Bioprocedes,Inst Natl Sci Applique, 135 Ave Rangueil, F-31077 Toulouse, France LA INRA 135 Ave Rangueil Toulouse France F-31077 France
Citazione:
M. Mercier-Bonin et al., "Hydrodynamics of slug flow applied to cross-flow filtration in narrow tubes", AICHE J, 46(3), 2000, pp. 476-488

Abstract

This article focuses on the characterization of slug-flow hydrodynamics intwo sizes of tubular membrane re diameters (6 and 15 mm) to quantify the main mechanical phenomena involved iii the limitation of particle fouling during cross-flow filtration of suspensions. By using a conductance probe technique, the flow structure was accurately identified for two geometries, nod noticeable differences tt ere observed in terms of void fractions, velocities and lengths of Taylor bubbles, and liquid slugs. This characterizationallowed some data to be theoretically estimated (wall shear stress, "falling" film velocity: film thickness) thanks to the application of a phenomenological model initially developed for oil pipes. The results obtained in a 15-mm tube showed that the ultrafiltration flux improvement experimentally achieved with bentonite and yeast suspensions, was partly due to the increase in the wall shear stress, induced by continuous gas sparging inside the tubular filtration module. Other hydrodynamic phenomena linked to the quasi-periodic succession of Taylor bubbles and liquid slugs were also involved in the control of the particle entrainment: intermittency frequency reversal of the wall shear stress instantaneous pressure variations in the long bubble wake with a higher level of turbulence, and an enhanced local mixing.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/08/20 alle ore 23:12:19