Accession Number : AD0754006

Title :   Interaction Between a Sound Field and Natural Convection on a Horizontal Cylinder,

Corporate Author : BROWN UNIV PROVIDENCE R I

Personal Author(s) : Davis,G. de Vahl ; Richardson,P. D.

Report Date : MAY 1972

Pagination or Media Count : 69

Abstract : Sound and vibrations affect convective heat transfer. An oscillating flow field can induce Reynolds stresses in a boundary layer. These Reynolds stresses may affect the time-mean motion, or even be its sole cause. Solutions for convection by streaming alone have already been found, within the framework of boundary-layer analysis for a circular cylinder under transverse oscillations. Solutions are obtained here to the coupled momentum and energy boundary layer equations for the interaction of a transverse sound field with natural convection on a horizontal cylinder in terms of aximuthal series of functions of the (transformed) radial coordinate. The solutions treat the cases where the direction of oscillations, transverse to the cylinder, is either horizontal or vertical. It has been found that horizontal oscillations increase the heat transfer coefficient at the bottom of a heated cylinder, while vertical oscillations cause a decrease. (Author)

Descriptors :   (*BOUNDARY LAYER, FLOW FIELDS), (*CONVECTION(HEAT TRANSFER), SOUND), HEAT TRANSFER COEFFICIENTS, EQUATIONS OF MOTION, STRESSES, REYNOLDS NUMBER, PARTIAL DIFFERENTIAL EQUATIONS, NUMERICAL ANALYSIS, TABLES(DATA), CYLINDRICAL BODIES

Subject Categories : Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE