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Some aspects of hydrodynamics in multistage bubble columns

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Abstract

Hydrodynamic aspects covering the flow regimes and dispersed phase holdup have been investigated in multistage bubble columns using different geometries for the horizontal perforated plates. Air-water, air-kerosene and air-CMC solutions are investigated to cover a wide range in physical properties of liquids. The data show that the plate perforation diameter, plate spacing and the gas flow rate are the principal variables influencing the flow regimes and the dispersed phase holdup.

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Abbreviations

d 0 m:

plate perforation diameter

D m:

column diameter

g m/sec2 :

acceleration due to gravity

H m:

height of the test section

k Pa.sn :

fluid consistency index

n :

flow behaviour index

P m:

interplate spacing

S :

fractional plate free area

U m/s:

superficial phase velocity

Mo :

Morton number (gμ4/ρσ3)

ɛ :

dispersed phase holdup

γ s−1 :

shear rate

μ Pa.s:

viscosity of liquid

ρ Kg/m3 :

density of liquid

σ N/m:

surface tension

app:

apparent

CMC:

carboxymethyl cellulose

g :

gas phase

l:

liquid phase

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Authors and Affiliations

  1. Department of Chemical Engineering, Indian Institute of Technology, 600 036, Madras, India

    M. Vinaya & Y. B. G. Varma

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  1. M. Vinaya
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  2. Y. B. G. Varma
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Vinaya, M., Varma, Y.B.G. Some aspects of hydrodynamics in multistage bubble columns. Bioprocess Engineering 13, 231–237 (1995). https://doi.org/10.1007/BF00417633

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