TY - JOUR
TI - Experimental studies on heat transfer and friction factor characteristics of a turbulent flow for internally grooved tubes
AU - Ponnusamy Selvaraj
AU - Shanmugam Rajasekaran
AU - Sivan Suresh
AU - Jaganathan Sarangan
JN - Thermal Science
PY - 2016
VL - 20
IS - 14
SP - 1005
EP - 1015
PT - Article
AB - This paper reports experimental studies on friction factor, Nusselt number,  and thermal hydraulic performance of a tube equipped with the classic three  modified internally grooved tubes. Heat transfer and friction factor  characteristics and pres- sure drop results have been obtained experimentally  for a fully developed water flow in a grooved tube is also reported. Tests  were performed for Reynolds number ranges from 5000-13500 for different  geometric grooved tubes (circular, square, and rapezium). The ratio of  length-to-diameter is 38.69 D. Among the grooved tubes, heat transfer  enhancement obtained up to 47% for circular grooved tube, 31% for square  grooved tube, and 52% for trapezoidal grooved tube in comparison with the  smooth tube. It has been observed that the friction factor high in the case  of square grooved tube than those of other tubes.