1Department of Mechanical Engineering, JNTU College of Engineering, Kukatpally, Hyderabad, 500085, Andhra Pradesh, India.
2Department of Mechanical Engineering, JNTU College of Engineering, Kakinada, Andhra Pradesh, India.
A CFD analysis was carried out to investigate the enhancement of heat transfer by incorporating different wire coil inserts in a tube of length 610 mm with an inside diameter of 27 mm. The analysis was performed with air as working fluid for the bare tube and the heat transfer coefficient obtained is compared with the experimental results for validation. It is observed that the heat transfer coefficient obtained analytically is 10.7% more than that obtained experimentally. The analysis was extended to six wire coil inserts with different pitches of 66mm, 38mm and 22mm.
The wire diameters used for analysis were 2mm and 3.4mm respectively. The Reynolds number ranged from 10353 to 12395. The model was developed in Gambit with finite meshing and exported into fluent 6.2.16. The heat transfer coefficient is found to increase by 190.6% and 311% with wire coil inserts of wire diameter 2.0mm and 3.4mm respectively for a coil pitch of 22 mm when compared with bare tube at Re=12395.
wire coil inserts, enhancement of heat transfer, CFD analysis, horizontal tube, turbulent flow
