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Biosystems Engineering
Teitel, M., Institute of Agricultural Engineering, Agricultural Research Organization, the Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
In computational fluid dynamics (CFD) analyses, insect-proof screens are usually simulated as porous media. In applying the porous medium approach, the Forchheimer equation with published correlations for the permeability K and inertial factor Y are usually used. In the present study, a comparison between simulations of flow through a realistic woven screen and a porous slab that represented the realistic woven screen indicated that using the published relations for K and Y may lead to erroneous results for pressure drops through screens. An alternative way, basically similar to that used in previous studies, for calculating K and Y is presented; it led to good estimates of pressure drops through various porous media slabs that were used to simulate realistic screen geometries. © 2009 IAgrE.
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Using computational fluid dynamics simulations to determine pressure drops on woven screens
105
Teitel, M., Institute of Agricultural Engineering, Agricultural Research Organization, the Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Using computational fluid dynamics simulations to determine pressure drops on woven screens
In computational fluid dynamics (CFD) analyses, insect-proof screens are usually simulated as porous media. In applying the porous medium approach, the Forchheimer equation with published correlations for the permeability K and inertial factor Y are usually used. In the present study, a comparison between simulations of flow through a realistic woven screen and a porous slab that represented the realistic woven screen indicated that using the published relations for K and Y may lead to erroneous results for pressure drops through screens. An alternative way, basically similar to that used in previous studies, for calculating K and Y is presented; it led to good estimates of pressure drops through various porous media slabs that were used to simulate realistic screen geometries. © 2009 IAgrE.
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