Experimental Study on Heat Transfer and Friction Factor in Laminar Forced Convection over Flat Tube in Channel Flow. (2015)

• Record Type: Journal Article
• Authors: Tahseen, Tahseen Ahmad; Rahman, M.M.; Ishak, M.
• Is Part Of: Procedia engineering. Volume 105(2015)
• Page Start: 46
• Page End: 55
• Publication Date: 2015
• Subjects: Laminar forced convection -- Heat transfer -- Fluid flow -- Reynold's number -- Heat flux -- Nusselt number; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.05.005
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: The heat transfer and fluid flow over a flat tube in the channel with laminar forced convection is experimentally investigated. The experiments were conducted at a flat tube in the flow direction, the five air velocity between 0.2 and1.0 m/s, and Reynolds number based on the hydraulic diameter ( Re Dh ) was considered from 124.5 to 622.5. The uniform heat flux supplies are at the surface of the tube are 354.9, 1016.3 and 1935.8 W/m 2 respectively. The experimental results indicate that the average Nusselt numbers ( N u ¯ D h ) for the flat tube increased with increase of Re Dh at fixed of the heat flux supply. The N u ¯ D h increased with an increase of heat flux supply at fixed Re Dh . On the other hand, the friction factor decreased with increases of the front free stream velocity. The N u ¯ D h relationship with Re Dh in the power law, the N u ¯ D h – Re Dh correlation was found to be N u ¯ D h = C × ( Re D h ) m . The correlation achieved good predictions of the measured data with the minimum root mean square value is 99.70%.