Characteristics of acoustic standing waves in packed-bed columns

Sai Kumar, T. ; Patle, Munesh Kumar ; Sujith, R. I. (2007) Characteristics of acoustic standing waves in packed-bed columns AIChE Journal, 53 (2). pp. 297-304. ISSN 0001-1541

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/aic.110...

Related URL: http://dx.doi.org/10.1002/aic.11067

Abstract

The acoustic characteristics of a column are described when filled with different random packings of various shapes, sizes and void fractions. An experimental setup was developed to study the acoustic field in a packed-bed column. Eight different packings were used to fill the column and for each packing the acoustic pressure amplitude and phase were measured along the length of the packed bed. The speed of sound and the attenuation coefficient were determined using a nonlinear regression technique. The speed of sound inside the column decreased when the column was filled with packings. The natural frequencies increased as the void fraction of a particular packing decreased. It is shown that the attenuation coefficient depends on a nondimensional frequency defined as ωd2/v, where v is the kinematic viscosity, ω is the angular frequency and d is the effective diameter of the packing.

Item Type:Article
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ID Code:110017
Deposited On:21 Dec 2017 10:56
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