Accession Number : ADA193064

Title :   The Heat Transfer and Fluid Dynamics of Concave Surface Curvature.

Descriptive Note : Annual rept. 1 Jan-31 Dec 87,

Corporate Author : STANFORD UNIV CA DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Johnston, J P ; Moffat, R J

PDF Url : ADA193064

Report Date : 10 Mar 1988

Pagination or Media Count : 12

Abstract : The overall goal of this project is study convective heat transfer and fluid-mechanics in a concavely curved turbulent boundary layer. The objective is to identify the mechanisms whereby concavity increases surface heat transfer. Progress during the past year has centered on the recently added goal of studying the combined effects of moderate levels of grid-generated turbulence and concave curvature. Overall results from the fluid-mechanics section of the project are that grid-generated turbulence increases the skin friction, but does not alter the near-wall mean velocity scaling or the near-wall levels of the velocity fluctuations. The heat transfer measurements are showing that the Stanton number is increased by the grid-generated turbulence with the combined effects of curvature and the additional turbulence producing the largest increase. Keywords: Heat transfer, Turbulent boundary layers, Adaptive grids.

Descriptors :   *CONVECTION(HEAT TRANSFER), *CURVATURE, *TURBULENT BOUNDARY LAYER, *BOUNDARY LAYER FLOW, ADAPTIVE SYSTEMS, CONCAVE BODIES, FLUID DYNAMICS, GRIDS, HEAT TRANSFER, MEASUREMENT, SKIN FRICTION, SURFACES, TURBULENCE, VARIATIONS, VELOCITY

Subject Categories : Thermodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE