Structure Development during Converging Flow of a Liquid Crystal Dispersed Two-Phase Fluid
Abstract
The flow dynamics of liquid crystal (LC)-dispersed two phase fluids were studied in order to determine the relationships between the deformation of the dispersed phase (D), the weber number (We) and the viscosity ratio of the two phases (k). A flow visualization apparatus consisting of a glass capillary with aconical converging entrance and a video system was constructed and used to measure droplet deformation in the entrance region (extensional flow) and in the capillary (shear flow). The systems studied included p-ethoxybenzyline-p- butylanine (EBBA) dispersed in three Newtonian fluids (50, 80, and 100% glycerin (aq)) and three viscoelastic, non Newtonian fluids (0.35. 1.0, and 1.5% polyacrylamide (aq)). The data were compared with the theoretical predictions for non-LC containing two phase fluids by Reijden-Stolk and Sara. D increased with increasing We and it appeared that LC droplets may experience more deformation than isotropic fluid dispersions for comparable values of We and K.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 03, 1989
- Accession Number
- ADA203062
Entities
People
- P. J. Yanisko
- Robert A Weiss
Organizations
- University of Connecticut