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

Title:	Dispersion in the laminar flow of Ellis model fluids through straight tubes
Author:	Huang, Yeong-Hua
View Online:	njit-etd1986-033 ( iv, 68 pages ~ 1.3 MB pdf)
Department:	Department of Chemical Engineering, Chemistry and Environmental Science
Degree:	Master of Science
Program:	Chemical Engineering
Document Type:	Thesis
Advisory Committee:	Wong, Wing T. (Committee chair) Lin, Chen-Chong (Committee member) Parker, Richard Clyde (Committee member)
Date:	1986-05
Keywords:	Dispersion Laminar flow
Availability:	Unrestricted
Abstract:	Taylor-Aris dispersion theory is extended to the laminar tube flow of Carreau model fluids and Ellis model fluids and the results are compared with those of power law fluids. It is found that Carreau and Ellis models are more appropriate than power-law model, especially at low pressure gradient. An exact solution to the unsteady convective diffusion equation in fully developed laminar flow in tube is obtained by applying the generalized dispersion theory of Gill and Sankarasubramanian for Ellis model. The results are compared with those obtained by Booras and Krantz for power-law model. The most interesting result of this work is that the power law is valid only at high shear stress, whereas Ellis model allows the prediction of dispersion coefficient and meansolute distribution over much wider range of external pressure gradient.