The experiments were conducted in 54.9mm diameter horizontal pipe on two sizes of glass beads of which mean diameter and geometric standard deviation are 440 mu m & 1.2 and 125 mu m & 1.15, respectively, and a mixture of the two sizes in equal fraction by mass. Flow velocity was up to 5m/s and overall concentration up to 50% by volume for each velocity. Pressure drop and concentration profiles were measured. The profiles were obtained traversing isokinetic sampling probes in the horizontal, 45 degrees inclined and vertical planes including the pipe axis. Slurry samples of the mixture collected in the vertical plane were analyzed for concentration profiles of each particle batch constituting the mixture. It was found that the pressure drop is decreased for the mixture at high concentrations except 5m/s and a distinct change of concentration profiles was observed for 440 mu m particles indicating a sliding bed regime, while the profiles in the horizontal plane remains almost constant irrespective of flow velocity, overall concentration and slurry type. (All rights reserved Elsevier).
Effect of particle size distribution on pressure drop and concentration profile in pipeline flow of highly concentrated slurry
International Journal of Multiphase Flow ; 31 , 7 ; 809-823
2005
15 Seiten, 10 Quellen
Article (Journal)
English