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Effect of fiber length distribution on gas holdup in a cocurrent air–water–fiber bubble column

Authors
Journal
Chemical Engineering Science
0009-2509
Publisher
Elsevier
Publication Date
Volume
62
Issue
5
Identifiers
DOI: 10.1016/j.ces.2006.11.042
Keywords
  • Bubble Column
  • Fiber Length Distribution
  • Fiber Suspension
  • Hydrodynamics
  • Multiphase Flow
  • Voidage

Abstract

Abstract An experimental investigation is reported on the effect of fiber length distribution on gas holdup in a cocurrent air–water–fiber bubble column. Different combinations of 1 and 3 mm Rayon fibers are used to simulate different fiber length distributions. At a constant total fiber mass fraction, gas holdup generally decreases with increasing mass fraction of the 3 mm Rayon fiber while other conditions remain constant. Crowding factors estimated using four different methods ( N c = N c , A , N c * , N c , L , and N c , M ) and the parameters N c , L N f 0.2 0.8 and N c , M N f 0.2 0.8 are tested on their performance to quantify the overall effects of fiber mass fraction and fiber length and its distribution on gas holdup. N c , L N f 0.2 0.8 and N c , M N f 0.2 0.8 provide the best characterization of the fiber effects on gas holdup in the cocurrent air–water–fiber bubble column. The crowding factor estimated using the model-based average fiber length ( N c , M ) also provides a good characterization and is better than the other crowding factor definitions.

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