Accession Number : ADA299441

Title :   The Effect of a Flexible Fiber Cover on Controlling Boundary Layer Flow and Heat Transfer.

Descriptive Note : Final rept. 1 Feb 92-31 Jan 95,

Corporate Author : DUKE UNIV DURHAM NC DEPT OF MECHANICAL ENGINEERING AND MATERIALS SCIENCE

Personal Author(s) : Bejan, Adrian

PDF Url : ADA299441

Report Date : 01 FEB 1995

Pagination or Media Count : 109

Abstract : This report describes the friction and heat transfer characteristics of a solid surface covered with flexible fibers. The work consisted of analysis, numerical simulations, and laboratory experiments. Chapter 1 documents the pressure drop and heat transfer through bundles of parallel cylinders in a domain that has been overlooked, namely, low Reynolds numbers, arrays that are long in the direction of flow such that the flow is hydraulically and thermally fully developed, and cylinders inclined relative to the flow direction. The heat transfer, friction and mechanical (elastic) interaction between an external laminar flow and a solid surface covered by a layer of fibers is documented in Chapter 2. The flow is initially perpendicular to the surface, and the fibers can bend. The effect of fiber bending,

Descriptors :   *CONVECTION(HEAT TRANSFER), *FRICTION, *BOUNDARY LAYER FLOW, PRESSURE GRADIENTS, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, FIBERS, OPTIMIZATION, STIFFNESS, TURBULENT BOUNDARY LAYER, BENDING, CORRELATION, MASS FLOW, FLOW FIELDS, TEMPERATURE GRADIENTS, CYLINDRICAL BODIES, THERMAL CONDUCTIVITY, TWO DIMENSIONAL FLOW, HEAT FLUX, LAMINAR FLOW, REYNOLDS NUMBER, FLEXIBLE MATERIALS, POROUS MATERIALS, ENTROPY, CROSS FLOW, BUNDLES.

Subject Categories : Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE