Impaction of spherical particles on cylinders at moderate Reynolds numbers

✍ Scribed by F.O. Griffin; A. Meisen

• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 740 KB
• Volume: 28
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(73)85005-5

✦ Synopsis

Inertial and interceptive impaction of spherical particles on circular cylinders was investigated theoretically. The particles were considered to be suspended in a fluid-moving steadily through a random array of parallel cylinders. Fluid flow fields around the cylinders were obtained by numerically solving the Navier-Stokes Equations subject to Kuwabara's zero vorticity boundary condition. These solutions were subsequently utilized in calculating particle trajectories and impaction efficiencies. The latter are presented as functions of Reynolds number (0.2 G Re, s 40), particle inertial parameter (0 G P 6 1000) particle to cylinder size ratio (0.001 G K c 1-O) and cylinder concentration ( 1 O-' G c L 0.111).

The impaction efficiencies and critical inertial parameters differ from earlier theoretical predictions. The discrepancies are primarily attributable to the inaccurate flow field representations used by urevious authors. The aareement between Subramanyam and Kuloor's experimental work and present iheory is satisfactory.