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Radial gas dispersion in a column packed with screen cylinders
Author(s) -
Chen B. H.,
Osberg G. L.
Publication year - 1967
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450450111
Subject(s) - thermal diffusivity , eddy diffusion , turbulence , reynolds number , mechanics , materials science , packed bed , dispersion (optics) , column (typography) , tracer , volumetric flow rate , analytical chemistry (journal) , thermodynamics , chemistry , geometry , physics , optics , chromatography , mathematics , connection (principal bundle) , nuclear physics
Gaseous eddy diffusivity measurements were made by a point injection technique in a 6.5‐in. column packed with open‐end screen cylinders varying in size from 3/8‐in. to 1 1/2‐in. diameter, and made from wire cloth varying from 4 to 28 mesh/in. Oxygen was used as the tracer gas. Only packings made from 4 to 10 mesh/in. produced concentration profiles which were symmetric. The latter data show that turbulent diffusivity increases linearly with gas flow rate, but decreases with decreasing mesh opening and wire diameter. A correlation is presented for turbulent diffusivities as a function of the Reynolds number, d m u ρ/m̈, and the ratio d w /d m .
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