Angles of repose of ground marigold petals as a function of particle size,moisture content, and flow enhancer

Loose and rolling angles of repose of uncompacted ground marigold petals we re measured as function of particle size (0.37, 0.57, and 0.80 mm), moistur e content (3.5 and 14.8% dry basis) and flow enhancer addition (1-35% of Tr icalcium phosphate - TCP). Larger particles had higher angles of repose. Th e effect of moisture content was not significant. Adding as little as 1% TC P reduced the angles of repose of ground marigold petals by 3 degrees. Roll ing angle of repose was 10 degrees to 15 degrees higher than the loose angl e of repose.