Geometrical, volumetrical and frictional properties of some medicinal plant seeds

Physical (geometrical, volumetrical and frictional) properties of some medicinalplant seeds such as fennel seeds, linseeds and harmal seed capsules were determined. The length, width and thickness were as 6.93, 2.13, 1.75 mm for fennel seeds, and 4.31, 2.28, 0.87 mm for linseeds, respectively. The length and diameter were as 6.65, 9.07 mm for harmal seed capsules, respectively. The bulk and true densities were determined as 270.5 and 664.6 kg/m3 (for fennel seeds), 384.3 and 1256.5 kg/m3 (for linseeds), 201.5 and 936.2 kg/m3 (forharmal seed capsules), respectively. The sphericity of the medicinal plant seeds were found as 0.43, 0.47, 0.72 for fennel seeds, linseeds and harmal seed capsules, while the angle of repose of fennel seeds, linseeds and harmal seed capsules were obtained as 17.35º, 13.84º, 29.94º, respectively. The highest static friction coefficient of the medicinal plant seeds such as fennel seeds, linseeds and harmal seed capsules were found for rubber friction surface.

Keywords:

fennel seeds , linseeds and harmal seed capsules , sphericity , volume , frictioncoefficient