ISSN Online: 2377-424X
ISBN Print: 0-89116-909-1
International Heat Transfer Conference 9
TURBULENT FLUID FLOW AND HEAT TRANSFER INDUCED BY SQUARE-RIBBED SURFACE ROUGHNESS IN CONCENTRIC ANNULI
要約
The fully developed turbulent momentum and heat transfer induced by the square-ribbed roughness elements on the inner wall surface in concentric annuli is studied analytically based on a modified turbulence model. The analytical results of the fluid flow is verified by experiment. The effects of various parameters such as the roughness ratio, the pitch to roughness ratio, the radius ratio etc. on friction factor and Nusselt number were investigated.
The study demonstrates that certain artificial roughness elements may be used to enhance heat transfer rates with advantages from the overall efficiency point of view.
The study demonstrates that certain artificial roughness elements may be used to enhance heat transfer rates with advantages from the overall efficiency point of view.