NUMERICAL STUDY ON HEAT TRANSFER AND PRESSURE DROP CHARACTERISTICS OF A TUBE EQUIPPED WITH WIRE COIL INSERT

摘要

Present work reports CFD studies of Nusselt number, friction factor and overall enhancement efficiency for a tube fitted with wire coil. The result showed that the wire coil with p/d of 0.434, 0.651 and 0.868 can enhance heat transfer up to 4.98, 5 and 4.3 times respectively and friction factors up to 5.82, 4.06 and 3.3 times respectively, in comparison with plain tube. Wire coil inserts with e/d of 0.038, 0.128 and 0.171 provide heat transfer enhancement around 4.99, 5.92 and 7.6 times respectively and friction factor enhancement up to 5.82, 19.97 and 35.7 times respectively than plain pipe.