The transition from free to forced convection in mass transfer from solid spheres | Zendy

Garner F. H. | Zendy; Hoffman J. M. | Zendy

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The transition from free to forced convection in mass transfer from solid spheres

Author(s) -

Garner F. H.,

Hoffman J. M.

Publication year - 1960

Publication title -

aiche journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.958

H-Index - 167

eISSN - 1547-5905

pISSN - 0001-1541

DOI - 10.1002/aic.690060415

Subject(s) - spheres , reynolds number , mass transfer , convection , forced convection , chemistry , mechanics , natural convection , thermodynamics , work (physics) , range (aeronautics) , materials science , physics , composite material , astronomy , turbulence

Mass transfer rates have been measured at 30°C. over a Reynolds number range of 1 to 130 for the solution of 3/8‐in. diameter spheres of benzoic acid for both upflow and downflow streams. These are compared with similar results for 3/4‐in. diameter spheres and show a gradual transition from forced to free convection. The interaction between the two effects is complex but less marked for the smaller spheres. Free convective effects do not disappear entirely until a Reynolds number of about 250 for the 3/8‐in. spheres, compared with a value of 750 given for 3/4‐in. spheres in the previous work (6).

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