Accession Number:

AD0619209

Title:

MASS, MOMENTUM, AND HEAT TRANSFER WITHIN A TURBULENT BOUNDARY LAYER WITH FOREIGN GAS MASS TRANSFER AT THE SURFACE. PART I. CONSTANT FLUID PROPERTIES

Descriptive Note:

Final rept. no. 111

Corporate Author:

ITEK CORP PALO ALTO CA VIDYA DIV

Report Date:

1964-02-01

Pagination or Media Count:

168.0

Abstract:

A critical reexamination is made of existing experimental data on the velocity, temperature, and concentration profiles in a low-speed, constant property turbulent boundary layer with surface mass injection. It is found that a model of the boundary layer can be constructed that fits the local profile data as well as the local drag, mass, and heat-transfer coefficients at the surface. The essential features of the model include a law of the wall that provides a continuous and smooth profile from the surface to the fully turbulent region and a wake region that joins the inner region smoothly and is characterized by an eddy diffusivity that is constant with respect to distance from the wall. Four empirical parameters appear in the analysis the Prandtl mixing length constant, K the Clauser eddy diffusivity Reynolds number an inner region mixing length constant analogous to Rottas intercept constant and a value of turbulent Schmidt or Prandtl number. Constant values of these parameters are found to be suitable in predicting data over a wide range of surface blowing or suction and Reynolds number

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE