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Description: The resistance to airflow through high-moisture soft-centre large round bales of alfalfa herb age was determined for air velocities between 1.0 and 1.5 m/s. A general one-dimensional mathematical modelrelating pressure gra dient and fluid velocity was developed based upon the concept of fluid flow in porous media. The model was further modified by assuming that for a characteristic alfalfa crop harvested in round bales,the lengthof an alfalfastemis muchgreaterthan its diameter, thus, the aspect ratiois negligible. Global viscous and inertial coef ficients werepredicted from the general and reducedmodels across bale axial lengths. Viscous forces dominated in planes around bale axial centres with inertial forces pronounced in planes near inlet and outlet faces. In general, the bales were found to be significantly denser in their axial centres than in the inlet and outlet portions.

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Citation: Y.D, Yiljep, W.K. Bilanski and D.M. Joy 1992. MODELLING PRESSURE DROP-VELOCITY RELATIONSHIPS IN LARGEROUND BALES OF ALFALFA HERBAGE. Canadian Agricultural Engineering 34(4):383-391.
Volume: 34
Issue: 3
Pages -
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Date: 1992
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Type: Text.Article
Format: PDF
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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