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Effect of vertical vibration on mass transfer from spheres.

Padmanabha, D and Nair, BG and Ramachandran, A (1970) Effect of vertical vibration on mass transfer from spheres. In: Indian Journal of Technology, 8 (7). pp. 243-247.

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Abstract

Mass transfer rates of sublimation of naphthalene in air from spheres subjected to vertical vibration were detd. for the following ranges of variables: amplitude, 13/32-7/8 in.; frequency, 180-600 cycles/min; and sphere diams., 1.0, 1.5, and 2.0 in. For values of vibrational Reynolds no. >200, vibration increases the values of the mass transfer considerably and a value as high as 7 times the free convection value is obtained. The mass transfer coeff. was correlated with the vibrational variables by the following dimensionless equations: NSh = 0.63(NRe)v0.64(a/d)0.63 and (hv/h0) = 1.15 [(NRe)v0.64(a/d)0.63/(NSc)1/3 (NGr)0.25]0.91, where N Sh, (NRe)u, N Sc and NGr are Sherwood no., vibrational Reynolds no., Schmidt no., and Grashof no., resp.; a is vibration amplitude; d is the sphere diam.; and hv and h0 are the mass transfer coeffs. with and without vibration, resp.

Item Type: Journal Article
Additional Information: The Copyright belongs to American Chemical Society.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 07 Apr 2006
Last Modified: 27 Aug 2008 11:50
URI: http://eprints.iisc.ernet.in/id/eprint/5987

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