Heat transfer due to impinging double free circular jets

• Published in: Alexandria engineering journal Vol. 54; no. 3; pp. 281 - 293
• Main Authors: Teamah, Mohamed A., Khairat, Mohamed M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-09-2015; Elsevier
• Subjects: Free impingement jets; Heat transfer; Hydraulic jump; Super cooling; Super cooling; Hydraulic jump; Heat transfer; Free impingement jets
• ISSN: 1110-0168
• DOI: 10.1016/j.aej.2015.05.010

The heat transfer and fluid flow between a horizontal heated plate and impinging circular double jets were studied experimentally. The parameters investigated are the Reynolds number of each jet and jet-to-jet spacing. Experiments are carried out covering a range for Reynolds number from 7100 to 30,800 for each jet, the dimensionless jet-to-jet spacing from 22.73 to 90.1. During experimental phases, the right jet Reynolds number was higher than the left jet Reynolds number. The isothermal contours were plotted for different cases as well as the distribution of water film thickness over the heated plate. The results indicated that increasing the Reynolds number of one jet than the other increases both local and average Nusselt numbers. In addition, increasing the jet-to-jet spacing at the same Reynolds number increases the average Nusselt number.