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The effect of molecular diffusion on mixing in fluidized beds

โœ Scribed by R.W. Fontaine; P. Harriott

Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
706 KB
Volume
27
Category
Article
ISSN
0009-2509

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โœฆ Synopsis

Gas mixing in a 6.5 in fluidized bed of sand was studied using frequency response techniques with He and CO* tracers. Samples taken in the bed, where the probe saw mainly dense phase gas, had a lower amplitude ratio than samples at the top of the bed where the bubble contribution predominated. The gas interchange coefficients showed a small dependence on the molecular diffisivity at about twice the minimum fluidization velocity but no effect of diffusivity at high velocities.

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