A Method of Modelling the Flow of a Propellant Dough in a Single Kneading Disc of a Twin Screw Mix-Extruder

Abstract

A simplified method of modelling 2 dimensional flow of propellant doughs in a kneading disc of a twin screw mix-extruder (SME) has been developed. The 2-dimensional model is a first step in the development of a full 3 dimensional model of flow in screws and kneading blocks in SMEs. The model is based on the FAN method of Tadmor as modified by Szydlowski et al, and it aims to use less computational effort than alternative models based on finite element analyses. Apart from one model for non-Newtonian fluids, which has several serious flaws, the existing models have assumed that the viscosity of the fluid was Newtonian. The model presented here gives a better method of calculating the flow of non-Newtonian fluids than the previous method, and it produces more realistic flow velocity profiles. (RWJ)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1990
Accession Number
ADA228453

Entities

People

  • R. C. Warren

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Propellants
  • Computer Programs
  • Computers
  • Difference Equations
  • Differential Equations
  • Double Base Propellants
  • Equations
  • Flow Rate
  • Geometry
  • Mainframe Computers
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Pressure Distribution
  • Propellants
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Mathematics

Readers

  • Aerodynamics.
  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.