Study of airflow resistance through beetroot seed bed
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| Authors: | Joanna Kaniewska1, Marek Domoradzki1, Lidia Wardęcka1 1Department of Chemical and Ford Technology and Apparatus, University of Technology and Life Science in Bydgoszcz ul. Seminaryjna 3, 85-326 Bydgoszcz |
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| Abstract : | The paper presents a study on the air flow resistance of beetroot seed bed. Air pressure drop across a porous layer of the seed, within a wide range of Reynolds number values, was described with a modified Levy equation. Determination of coefficient of resistance depending on Reynolds number allows to design a height of the layer in an dryer for a particular fan or to select the fan for the assumed height of the bed, which ensures the optimum drying time. Physical properties of beetroot seeds were determined. Pressure drop in the different heights of the bed were estimated. This allowed to determine the elementary pressure gradient. Relationship between the elementary pressure gradient and airflow velocity was described by Ergun equation. To describe the relationship between the coefficient of resistance and a constant Reynolds number friction K2 = 15.03 was calculated. |
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| Keywords : | flow resistance of particulate material, seed drying | ||||||||
| Language : | Polish | ||||||||