EXPERIMENTAL TECHNIQUES IN ELECTROHYDRODYNAMICS.

Abstract

The critical Reynolds number for Hagen-Poiseuille flow was more accurately detected by means of the electric double layer technique. Results are obtained utilizing reversible microelectrodes mounted flush with the wall of the pipe in the region of fully developed Hagen-Poiseuille flow. Previous measurements depended on electrodes beyond the ends of the pipe, so that the effect of the entrance flow region of the pipe was included -- a source of error. Use was made of the microelectrodes to detect the streaming potential fluctuations and Fourier analysis of the fluctuation waveforms was carried ou; the autocovariance function of each waveform and the Fourier transform (spectral density) of the autocovariance function were computed. A viscosimeter capable of handling small volumes of biological fluids (such as blood) was designed and construction is almost complete. The design is based on Stoke flow between two rotating coaxial, concentric cones. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 31, 1970
Accession Number
AD0706934

Entities

People

  • Addison G. Hardee
  • Knox Millsaps

Organizations

  • Colorado State University

Tags

DTIC Thesaurus Topics

  • Construction
  • Electric Double Layer
  • Electrodes
  • Electrohydrodynamics
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Fourier Analysis
  • Measurement
  • Microelectrodes
  • Poiseuille Flow
  • Reversible
  • Reynolds Number
  • Waveforms

Readers

  • Approximation Theory.
  • Fluid Dynamics.
  • Plasma Physics.