Abstract: Design of unit operations for mechanical and pneumatic cleaning, transportation (conveying), processing and storage\r\nof cardamom seeds are dependent on moisture content. Some of moisture dependent physical properties of cardamom seeds\r\nwere studied at moisture contents 9.9%, 13.57%, 18.41%, and 23.29% wet basis (w.b.). The length, width, thickness,\r\ngeometric mean diameter, thousand seed mass, and sphericity increased from 17.01 to 17.30 mm, 5.68 to 6.57 mm, 5.02 to\r\n5.35 mm, 7.86 to 8.47 mm, 120.83 to 165.60 g, and 0.46 to 0.49, respectively, with the increase in the moisture content from\r\n9.9 to 23.29% w.b. As the moisture content increased from 9.9 to 23.29% the bulk density, true density, and porosity\r\ndecreased from 408.2 to 358.90 kg/m3, 926.57 to787.19 kg/m3, and 55.94 to 54.41%, respectively. The angle of repose\r\nincreased from 72.16o at 9.9% to 73.80o at 23.29% moisture content. Whereas, the static coefficient of friction increased with\r\nthe increase in moisture content from 9.9 to 23.29% on three different surfaces. The highest static coefficient of friction was\r\nrecorded when cardamom seed against plywood (0.47 to 0.56), and lowest static coefficient of friction against mild steel (0.41\r\nto 0.50). The static coefficient of friction between cardamom seeds and galvanized iron surface increased from 0.44 to 0.53\r\nwithin the studied moisture content range.
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