Y. Vazifeshenas - Faculty of Mechanical Engineering, Babol University of Technology, Babol, Iran.
M.A Delavar - Faculty of Mechanical Engineering, Babol University of Technology, Babol, Iran.

The article presents a practical technique for enhancing thermo-hydraulic performance of a circulartube. In this way, numerical method focusing on laminar tubular flow is used to compare theeffectiveness of utilizing center-cleared twisted tapes instead of typical shape of short width tapes.Numerical analysis represented that using both center-cleared and typical shape of twisted tapes, Reenhancement reduces the flow resistance. Studying short width twisted tapes showed that decreasingthe width of twisted tape, reduces the heat transfer and hydraulic performance. Contrarily, usingsufficient clearance for center-cleared twisted tapes can increase the heat transfer. Hence, applyingcenter-cleared twisted tape as a tool of enhancing heat transfer can be a promising and practical idea

Twisted TapeHeat TransferFriction FactorLaminar Tubular Flow