Department of Agricultural Machinery, Faculty of Agriculture, Lorestan University, Khorramabad, Iran.
J Sci Food Agric. 2013 Apr;93(6):1466-70. doi: 10.1002/jsfa.5916. Epub 2012 Oct 15.
Wild mustard seed is similar in size and shape to canola seed and can be separated by pneumatic means if the aerodynamic properties of these two materials are well known. The objective of this study was evaluation of the aerodynamic properties of canola and wild mustard seeds as a function of moisture content from 5% to 20% (w.b).
The results showed that the terminal velocity of canola seeds increased, following a polynomial relationship from 5.401 to 6.566 m s(-1), as the moisture content increased from 5% to 20%. Over this same moisture content range the terminal velocity of wild mustard seeds varied from 4.276 to 5.433 m s(-1). The drag coefficient of canola and wild mustard seeds decreased linearly from 1.062 to 0.646 and from 1.432 to 0.928, respectively, as moisture content increased from 5% to 20%. Analysis of variance showed that there was a significant difference between the terminal velocity and drag coefficient of canola and wild mustard seed at a 1% probability level.
The results suggest that aerodynamic separation of wild mustard seed from canola is possible. Moisture content had a significant effect on the terminal velocity and drag coefficient of seeds.
野芥菜种子的大小和形状与油菜籽相似，如果这两种材料的空气动力学特性已知，则可以通过气动方式将其分离。本研究的目的是评估油菜籽和野芥菜种子的空气动力学特性，作为水分含量从 5%到 20%（w.b）的函数。
结果表明，油菜籽的终端速度随着水分含量从 5%增加到 20%，呈多项式关系从 5.401 增加到 6.566 m s(-1)。在相同的水分含量范围内，野芥菜种子的终端速度从 4.276 变化到 5.433 m s(-1)。油菜籽和野芥菜种子的阻力系数分别从 1.062 线性减小到 0.646 和从 1.432 线性减小到 0.928，随着水分含量从 5%增加到 20%。方差分析表明，油菜籽和野芥菜种子的终端速度和阻力系数在 1%的概率水平上存在显著差异。
结果表明，从油菜籽中气动分离野芥菜种子是可能的。水分含量对种子的终端速度和阻力系数有显著影响。
