Vol. 10, Issue 12 (2021)

Author(s):
E Gowthami, DD Smith, L Edukondalu, Vimala Beera and V Srinivasa Rao

Abstract:
In this study, frictional properties like angle of repose and coefficient of static friction of rice bran were evaluated at seven different moisture contents (9.4, 12, 15, 20, 25, 30 & 35% w.b.) on different surface materials namely; glass, fiber, plywood and mid steel. The results showed that linear relationship noticed between angle of repose and moisture content with high correlation coefficient (0.98). The angle of repose of rice bran was greatest (56.98±0.01) at high moisture content (35%w.b.) and least (23.5±0.27) for low moisture content (9.4% w.b.). The static coefficient of friction value for rice bran on all four structural surfaces (fiber, glass, mild steel and wood) was investigated. The peak value was observed for mild steel (0.687–1.184) at high moisture content (35% w.b.) and lowest for (0.328–0.812) on wood surface. High correlation coefficient (0.99) for mild steel established the relationship between coefficient of static friction and moisture content. The coefficient of static friction of rice bran on all four test surfaces decreased linearly with decreasing the moisture content.