About AAQR

Aims and Scope

Articles online
For contributors
Call for Papers
Guideline for the
Special Issue Proposal
Subscription
Information

Advertising

Contact Us
 
Search for  in   Search  Advanced search  

 

Volume 2, No. 1, June 2002, Pages 71-86 PDF(1.57 MB)  
doi: 10.4209/aaqr.2002.06.0008   

Apparent Viscosity of a Monodispersed Liquid Aerosol

Shih-Hsin Chen, Jun-Jay Lee, Chi-Yia Maa

Department of Chemical Engineering, Hwa Hsia College of Technology and Commerce, Chungho City, Taipei Hsien 235, Taiwan ROC

 

Abstract

 

The work presents an analytical study of the effective viscosity of a mono-dispersion of liquid aerosol droplets in a gas medium based on a steady-state low-Reynolds number hydrodynamics. The Kundsen and Reynolds numbers are assumed to be small, and thus fluid flows inside and outside the fluid particle can be described using a continuum model with a hydrodynamic slip at the drop-gas interface, while the flow fields are governed by the Stokes equations. Three types of cell models are employed to solve the problem, namely the Simha, Happel and Kuwabara cell models. Regarding the limitations of this study, the analytical expression of apparent viscosity as functions of the particle volume fraction in a closed form agree with the literature. The bulk viscosity is significantly influenced by the surface properties of the droplet-gas interface and by the internal-to-external viscosity ratio of the droplet. Generally, the influence of the concentration effect of the particles on the apparent viscosity increases with the volume fraction of the dispersed liquid drops.

 

 

Keywords: Aerosol; Emulsion; Liquid droplet; Effective viscosity; Unit cell model.

 

 

Copyright © 2009-2014 AAQR All right reserved.