Investigation of Pipe Flow Instability and Results for Wave Number Zero.

Abstract

Past research by Harrison and Johnston on the stability of pipe flow yielded only tenuous results owing to errors in setup of the problem and in formulation of the complex axis boundary conditions. Recent advances in the formulation of these boundary conditions and application of generalized stability criteria allowed an accurate numerical solution to be made for angular wave number zero. The results show that flow for this case is characterized by certain instabilities that have not been previously identified in linearized studies of this type. A nonuniform computational mesh was developed which provided dramatic reductions in computational time on a limited basis. Two data reduction programs were also developed to process and display data generated by the main program. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1978
Accession Number
ADA066374

Entities

People

  • Michael James Arnold

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boltzmann Equation
  • Computational Fluid Dynamics
  • Computational Science
  • Computer Programs
  • Data Reduction
  • Difference Equations
  • Differential Equations
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Mechanics
  • Numerical Analysis
  • Pipe Flow
  • Poiseuille Flow
  • Reynolds Number
  • Two Dimensional

Readers

  • Computational Fluid Dynamics (CFD)
  • Computational Modeling and Simulation
  • Control Systems Engineering.