ROTATING FLOWS OVER A ROTATING DISK FOR A CLASS OF NON-NEWTONIAN FLUIDS.

Abstract

Axisymmetric rotating flows over a rotating disk for Non-Newtonian fluids of Reiner-Rivlin type are calculated by means of an adjustable local boundary layer approximation. Variation of the dynamic similarity parameter, which characterizes the Non-Newtonian fluid, shows that secondary motions of stagnation, wake or cell type can exist. The beginning of instability in Bodewadt type motions, which indicates laminar flow separation from the surface of the disk, is shifted to higher Reynolds numbers for Non-Newtonian fluids. Furthermore, the largest tangential shear stress at the surface is exhibited by laminar flows of Newtonian fluids. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1966
Accession Number
AD0636102

Entities

People

  • Ernst W. Schwiderski
  • Hans J. Lugt

Organizations

  • Naval Surface Warfare Center Dahlgren Division

Tags

DTIC Thesaurus Topics

  • Axisymmetric
  • Boundaries
  • Boundary Layer
  • Flow
  • Flow Separation
  • Instability
  • Laminar Flow
  • Layers
  • Reynolds Number
  • Shear Stresses
  • Stresses

Fields of Study

  • Mathematics

Readers

  • Fluid Dynamics.