Void fraction as a function of depth and pressure drops of packed beds of porous media formed by granular materials


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dc.contributor.author Haque, E.
dc.date.accessioned 2012-04-27T17:47:45Z
dc.date.available 2012-04-27T17:47:45Z
dc.date.issued 2012-04-27
dc.identifier.uri http://hdl.handle.net/2097/13722
dc.description.abstract A mathematical equation that describes the void fraction as a function of location, bulk density at the surface,bulk density at the location of interest in the bed, maximum bulk density, bin geometry, friction properties of the grain, and the ratio of lateral to vertical pressures of the grain in a deep packed bed of bulk solids was developed. Variation in the void fraction caused variation in the pressure drop per unit of bed depth. Since bulk density and void fraction are functionally related to each other, the void fraction was expressed as a mathematical function of bed depth, and the model was verified using fundamentals of mathematics. In order to develop the model, Ergun's equation was used and integrated over the bed depth, substituting a void fraction that varied with the bed depth. Model results were compared to Shedd's data. Agreement between Shedd's data and this model was good to a bed depth of 10 m. For bed depths greater than 10 m, results from this model gave much greater pressure drop values than were given by Shedd. The model showed that pressure drop per unit of bed depth increases exponentially with the bed depth. en_US
dc.relation.uri http://elibrary.asabe.org/toc_journals.asp?volume=54&issue=6&conf=t&orgconf=t2011 en_US
dc.subject Granular material en_US
dc.subject Packed bed en_US
dc.subject Pressure depth en_US
dc.subject Void fraction en_US
dc.title Void fraction as a function of depth and pressure drops of packed beds of porous media formed by granular materials en_US
dc.type Article (publisher version) en_US
dc.date.published 2011 en_US
dc.citation.epage 2243 en_US
dc.citation.issue 6 en_US
dc.citation.jtitle Transactions of the ASABE en_US
dc.citation.spage 2239 en_US
dc.citation.volume 54 en_US
dc.contributor.authoreid ehaque en_US

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