Experimental Investigations and Numerical Analysis on Heat Transfer and Friction Factor Characteristics of a Laminar Flow for Internally Grooved Tubes

摘要

This paper reports the experimental and computational fluid dynamics (CFD) studies on friction factor, Nusselt number and hydraulic performance of internally grooved tubes. Tests were performed for Reynolds number ranges from 300 to 2300 for different geometric grooved tubes of Circular, Square, Trapezium. The ratio of length-to-diameter is 38.69D. Among the grooved tubes, heat transfer enhancement up to 48% circular grooved, 24% square grooved and 33% for trapezoidal grooved tube. It has been observed that the friction factor high in the case of square grooved tube than those of other tubes.