Rates of particle deposition from aqueous suspensions in turbulent flow: a comparison of theory with experiment

✍ Scribed by Carl W. Turner

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 822 KB
• Volume: 48
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(93)80236-j

✦ Synopsis

Particle transport velocities have been determined from published data for aqueous suspensions and dimensionless particle relaxation times (ti) ranging from 10m4 to 5. These were compared to predictions from several theories of particle transport. There is reasonably good agreement between measured and predicted transport velocities for diffusion-limited particle transport (ti -0.001). The particle transport rate is dominated by the contribution from inertial forces for t,' 3 0.02, in contrast to aerosol systems, where diffusion dominates up to t, + = 0.20. The theories of Beal and Davies are in much better agreement with the experimental data in the inertial regime than is the theory of Cleaver and Yates. For t,' 2 0.2, the particle transport rate is no longer dominated by inertia but appears to be controlled by a diffusion process. None of the theories examined account for the magnitude of the particle transport rate in this regime.