Table of Contents
Journal of Thermodynamics
Volume 2012, Article ID 580593, 12 pages
Research Article

CFD Analysis for Heat Transfer Enhancement inside a Circular Tube with Half-Length Upstream and Half-Length Downstream Twisted Tape

1Department of Mechanical Engineering, MIT College of Engineering, Pune-411028, India
2Department of Mechanical Engineering, Flora Institute of Technology, Pune-412205, India

Received 30 August 2012; Revised 31 October 2012; Accepted 31 October 2012

Academic Editor: Ahmet Z. Sahin

Copyright © 2012 R. J. Yadav and A. S. Padalkar. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


CFD investigation was carried out to study the heat transfer enhancement characteristics of air flow inside a circular tube with a partially decaying and partly swirl flow. Four combinations of tube with twisted-tape inserts, the half-length upstream twisted-tape condition (HLUTT), the half-length downstream twisted-tape condition (HLDTT), the full-length twisted tape (FLTT), and the plain tube (PT) with three different twist parameters ( , 0.27, and 0.38) have been investigated. 3D numerical simulation was performed for an analysis of heat transfer enhancement and fluid flow for turbulent regime. The results of CFD investigations of heat transfer and friction characteristics are presented for the FLTT, HLUTT, and the HLDTT in comparison with the PT case.