THE EFFECE OF BUOYANCY FORCES ON FORCED CONVECTION IONIC MASS TRANSFER AT HORIZONTAL PLANAR ELECTRODES.

Abstract

The effect of byoyancy forces on ionic mass transfer to electrodes in a horizontal flat duct were studied experimentally with both laminar and turbulent bulk flow. Cu electrodes and an acified Cu SO4 electrolyte were used in obtaining mass transfer data. With turbulent bulk flow, byoyancy forces were found to have a negligible effect on the mass transfer process. With laminar bulk flow, buoyancy forces can induce secondary flows near the electrode interface in the form of roll cells or even turbulence if the Grashof number is sufficiently high. Either of these free convective secondary flows can dominate the mass transfer process. A method of predicting average mass transfer coefficients for laminar bulk flow is described. Other experiments were performed to obtain local mass transfer rates. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1963
Accession Number
AD0426444

Entities

People

  • Robert Gordon Hickman

Organizations

  • University of California, Berkeley

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Buoyancy
  • Coefficients
  • Convection
  • Electrodes
  • Electrolytes
  • Flow
  • Mass Transfer
  • Secondary Flow
  • Transport Ships
  • Turbulence

Readers

  • Electrochemical Surface Science
  • Fluid Dynamics.
  • Marine Hydrodynamics