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

Title:	Simulation and modeling of magnetically-assisted impaction coating (MAIC) process for dry particle coating
Author:	Chaudhuri, Bodhisattwa
View Online:	njit-etd2000-010 (xvii, 134 pages ~ 7.2 MB pdf)
Department:	Department of Mechanical Engineering
Degree:	Doctor of Philosophy
Program:	Mechanical Engineering
Document Type:	Dissertation
Advisory Committee:	Dave, Rajesh N. (Committee co-chair) Singh, Pushpendra (Committee co-chair) Pfeffer, Robert (Committee member) Rosato, Anthony D. (Committee member) Chen, Rong-Yaw (Committee member)
Date:	2000-05
Keywords:	Magnetically assisted Impaction coating Newton's equations Van der waal force
Availability:	Unrestricted
Abstract:	The objective of proposed research is to model, and understand the processes happening at multiple length and time scales in magnetically assisted impaction coating process. The smallest length scale is of the order of the molecular size and is important because during collisions the molecules rearrange themselves to form a semi-permanent bond between the core and secondary particles, which is studied by using the results of direct numerical integration of the governing Newton's equations. The effect of parameters such as size, orientation and relative velocity of particles on the collision mechanics is quantified. The largest length scale which is the device scale determines the magnetic field strength that is needed to fluidize the mixture. The intermediate length scale is of the order of particle size. The frequency of collision among the fluidized particles at this length scale determines the residence time required to coat the particles. The velocities and the normal force attained by the non-magnetic particles are estimated and compared with the same necessary for coating process. The deformation of the virtual guest particles are estimated from the normal force of collision of host particles and the van der Waal force of attraction is calculated. The attraction force is found to be more than the separation force of guest from the host, which is favorable for the coating process.