The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Particle deposition from turbulent flow in a divergent channel
Author:	Huang, Wai-Ting
View Online:	njit-etd1997-058 (xvii, 120 pages ~ 4.4 MB pdf)
Department:	Department of Mechanical Engineering
Degree:	Doctor of Philosophy
Program:	Mechanical Engineering
Document Type:	Dissertation
Advisory Committee:	Chen, Rong-Yaw (Committee chair) Droughton, John Vincent (Committee member) Geskin, E. S. (Committee member) Singh, Pushpendra (Committee member) Zhou, MengChu (Committee member)
Date:	1997-05
Keywords:	Viscous flow. Transport theory. Numerical analysis.
Availability:	Unrestricted
Abstract:	This dissertation presents a numerical analysis of particle deposition from a dilute gas-solid two-phase suspension in a divergent channel. The Lagrangian governing equations for particle motion include inertia force, viscous force, gravity force and image force from electrostatic charge on the particle. The incompressible two-dimensional turbulent flow field in a divergent channel is solved by employing a Κ-ε modeling technique with FIDAP finite element CFD software. A computational procedure is developed to incorporate the flow field into numerical simulation of particle trajectories from which the fraction of deposition is determined. Several divergent channels (half divergent angles of 0°, 7.5°, 10° and 12.5°) coupled with the combination of dimensionless parameters (inertia parameter 0.015 ≤ S ≤ 100, gravity parameter 0.01 ≤ G ≤ 100 and charge parameter 0.00001 ≤ Q ≤ 10000) are performed and the effects of these parameters on the deposition are determined. The mechanism of particle motion in a two-dimensional turbulent channel is understood from the analysis of particle trajectory and deposition.