A. Ginestet et al., FURTHER-STUDIES ON FLOWING GAS-SOLIDS SUSPENSIONS IN A TUBE AT HIGH ANGLES OF INCLINATION, Canadian journal of chemical engineering, 72(4), 1994, pp. 582-587
The flow of glass (0.571 mm) and canola seed (1.75 mm) particles entra
ined by air in a 31.8 mm i.d. conduit inclined at 72 degrees or at 90
degrees to the horizontal was studied. With glass particles a transiti
on between a dilute and a dense phase was found at both orientations,
but no transition point was found with canola seed particles. Plots of
solids volume fraction versus solids flux in the dilute regime were c
urved, implying interparticle interactions were significant even at ve
ry low solids volume fractions. The velocity of canola seed particles
in admixture with sand particles (0.186 mm) increased as the proportio
n of sand in the mixture increased. Finally, it was found that the oil
y film imparted by the canola seed particles to the sand particles sig
nificantly affected the behaviour of the sand particles in the dense r
egime.