GAS-PARTICLE FLOW IN A DUCT OF ARBITRARY INCLINATION WITH PARTICLE-PARTICLE INTERACTIONS

Earlier work of Sinclair and Jackson on the flow of gas-particle suspe nsions in vertical pipes is extended to the case of ducts of arbitrary inclination. As a result of the compaction due to gravity, it is nece ssary to take into account forces transmitted between particles at poi nts of sustained, rolling and sliding contact, and a simple frictional model of this contribution to the stress is introduced. The resulting theory is shown to predict fully developed flows with the qualitative features to be expected, even in horizontal ducts. The effects of flo w rates, duct inclination, and duct width on the solution are explored .