Accession Number : ADA309909

Title :   Modeling of Nonisothermal Viscoelastic Slender Jet and Thin Sheet Flows.

Descriptive Note : Final technical rept. 1 Jun 92-30 Nov 95,

Corporate Author : INDIANA UNIV-PURDUE UNIV AT INDIANAPOLIS

Personal Author(s) : Wang, Qi

PDF Url : ADA309909

Report Date : 30 NOV 1995

Pagination or Media Count : 5

Abstract : The central theme in the study for viscoelastic flows is the modeling of thin filament flows. In particular, we want to address the issues that industries are interested in such as derivation and evaluation of reliable low-dimensional models, temperature distribution along the spinline and radial variation in fiber spinning processes and modeling of crystallization in fiber spinning processes. Our platform in addressing these issues is based on the Maxwell, Johnson-Segalman constitutive equations for the extra stress and their modifications for nonisothermal flows. Specifically, we developed a systematic way to derive and evaluate 1-D models of Maxwell and Johnson-Segalman flows, derived hybrid 2-D nonisothermal models for temperature dependent spinning processes, and studied linear and nonlinear stabilities of the flows in different geometries.

Descriptors :   *VISCOELASTICITY, *SPINNING(INDUSTRIAL PROCESSES), THERMAL PROPERTIES, FIBERS, STABILITY, POLYMERS, CRYSTALLIZATION, LIQUID CRYSTALS, NONLINEAR SYSTEMS, FILAMENTS, THINNESS, FLOW.

Subject Categories : Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE