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Effect of laminar flow on the rate of mass transfer inside cubical cavities
Faculty
Science
Year:
1997
Type of Publication:
Article
Pages:
199-202
Authors:
Zaki, MM, Nirdosh, I, Sedahmed, GH
DOI:
10.1002/ceat.270200307
Journal:
CHEMICAL ENGINEERING \& TECHNOLOGY WILEY-V C H VERLAG GMBH
Volume:
20
Research Area:
Engineering
ISSN
ISI:A1997XA84100006
Keywords :
Effect , laminar flow , , rate , mass transfer
Abstract:
An electrochemical technique which involved measuring the limiting current of the cathodic reduction of potassium ferricyanide was used to study the rate of mass transfer inside a cubical cavity machined in the wall of a vertical rectangular duct. Variables studied were side length, physical properties of the solution and flow rate of the solution. The mass transfer coefficient was found to decrease with increasing cavity size; in all cases, the mass transfer coefficient inside the cavity was less than that at the duct wall. Mass transfer data inside the cavity were correlated by the equation Sh(c) = 0.525 (Sc Re d(e)/L)(0.33). Comparison of the present results with the results obtained using other cavity geometries shows that cavity geometry plays an important role in determining the rate of mass transfer inside the cavity.
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