Date of Completion
9-22-2015
Embargo Period
9-21-2016
Advisors
Anson Ma, Xinyu Zhao, Ying Li
Field of Study
Mechanical Engineering
Degree
Master of Science
Open Access
Campus Access
Abstract
Theoretical investigation is presented for a linear viscoelastic flow induced by an oscillatory colloidal particle in nonadsorbing polymer solutions. At small-amplitude oscillation, the polymer distribution is assumed at equilibrium and forms a depletion zone around the particle based on polymer mean field approximation. A simplified two-layer approximation is compared with numerical results using a continuous depletion profile to describe the nonuniform complex viscosity. The goal is to present the apparent complex viscosity sensed by the particle and to distinguish it from the actual viscosity of the bulk fluid. The resulting friction coefficient can be used to interpret active or passive microrheological measurement that takes polymer depletion into account.
Recommended Citation
He, Yanzhen, "Viscoelastic Flow Induced by an Oscillatiing Sphere for Probing Microrheological Properties of Nonadsorbing Polymer Solutions" (2015). Master's Theses. 835.
https://digitalcommons.lib.uconn.edu/gs_theses/835
Major Advisor
Tai-Hsi Fan