Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

EFFECT OF TRANSVERSE CONVEX SURFACE CURVATURE ON TURBULENT HEAT TRANSFER IN CONCENTRIC ANNULI

Get access (open in a dialog) DOI: 10.1615/IHTC11.2390
pages 39-44

Abstrakt

The effect of the transverse convex surface curvature on the fully developed turbulent flow and heat transfer in concentric annular ducts with smooth surfaces were studied both analytically and experimentally. It is seen from the study that both the friction and heat transfer coefficients increase with decreasing value of the inner core radius of concentric annuli, R;. It is concluded from the study that, while the effect of the transverse concave curvature on fluid flow and heat transfer is negligible, that of the transverse convex curvature is rather significant. It is further deduced from the present study that the tube-based heat transfer correlations, such as those for heat exchanger design codes, or especially for nuclear fuel channels safety codes, should not be applied to flow outside of tube bundles or in a subchannel whose heated surfaces are convex.