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Particle Residence Time Distributions in Two-phase Flow in Straight Round Conduit |
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| Authors: | B BARRY YANG KENNETH R SWARTZEL |
| Affiliation: | Author Yang (formerly with the Dept. of Food Science, North Carolina State Univ.) is now affiliated with Food Industry Research &Development Institute, P.O. Box 246, Hsinchu, Taiwan, R.O.C.;Author Swartzel is with the Dept. of Food Science and Dept. of Biological &Agricultural Engineering, North Carolina State Univ., Raleigh, NC 27695-7624. |
| Abstract: | Residence times were studied for single particles (polystyrene spheres 19.1 mm diam) in the straight portion of the holding section of a continuous flow system. Particle residence times were all less than the mean residence time of fluid; their ranges were within particle-to-fluid residence time ratios of 0.8 to 1.0. The velocities of the fastest moving particles were all about 1.25 times the mean fluid velocity in the turbulent flow regime. Particle density was important in the flow patterns of two-phase flow. The effect of particle-to-fluid density ratios on the particle residence time followed a quadratic function where particles with density ratio of 1.01 had the least residence time. |
| Keywords: | particles residence time conduit two-phase |