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http://dx.doi.org/10.11002/kjfp.2016.23.5.746

Effect of moisture content on terminal velocities of domestic wheat and foreign materials  

Choi, Eun-Jung (Division of Food Safety, Distribution and Standard Research, Korea Food Research Institute)
Kim, Hoon (Division of Food Safety, Distribution and Standard Research, Korea Food Research Institute)
Kim, Sang-Suk (Division of functional Food Research, Korea Food Research Institute)
Kim, Oui-Woung (Division of Food Safety, Distribution and Standard Research, Korea Food Research Institute)
Publication Information
Food Science and Preservation / v.23, no.5, 2016 , pp. 746-752 More about this Journal
Abstract
This research was carried out to identify aerodynamic property as a function of moisture content for designing equipment such as for post-harvest management. Terminal velocity of two wheat varieties {Backjjung (B) and Jogyeong (J)} with selected sound, damaged kernel and foreign materials (Wheat stick, Wheat husks) were measured with a designed vertical wind column at different moisture contents from about 9 to 30% wet basis. The results showed that terminal velocity of wheat and foreign materials except of Jogyeong's husks (p<0.05) had a significant difference at p<0.001. With increasing moisture content, the aerodynamic property values of the kernels and foreign materials of the two wheat varieties increased linearly. In detail, terminal velocity of sound and damaged kernel increased from 5.46 to 7.13 m/sec (B) and 7.48 to 8.60 m/sec (J), damaged kernel from 5.91 to 7.00 m/sec (B) and 6.48 to 7.75 m/sec (J). For foreign materials the terminal velocity of wheat stick increased from 2.92 to 4.07 m/sec (B) and 3.74 to 5.22 m/sec (J) whereas that of husks from 1.07 to 1.85 m/sec (B) and 2.02 to 2.33 m/sec (J) each. For air separation of wheat and foreign materials, the air flow should be less than 5.22 m/sec due to the range (1.07~5.22 m/sec) of foreign materials in wheat.
Keywords
terminal velocity; moisture content; wheat; foreign materials;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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