Rheology Study of Antimist Fuels.
Abstract
Two different rheological phenomena have been studied that may relate to the mechanisms by which high molecular weight polymers inhibit misting. The first of these is a shear thickening or antithixotripic phenomenon in which the liquid fuel develops a shear induced structure above a critical shear stress. The second phenomenon involves the sudden increase in resistance to flow in porous media that certain polymer solutions exhibit when the flow rate is above a critical value. This effect is quite different from the first in that the former can be induced by shear while the latter requires elongation. The theoretical significance of the critical flow rate in porous media has been discussed in terms of a fluid relaxation time which in turn may be related to the polymer molecular weight. A relationship between the critical flow rate and the intrinsic viscosity is presented that explains why the former is more sensitive to polymer degradation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1977
- Accession Number
- ADA039758
Entities
People
- R. J. Mannheimer
Organizations
- Southwest Research Institute