title: Development of pulsating twin jets mechanism for mixing flow heat transfer analysis.
abstract: Pulsating twin jets mechanism (PTJM) was developed in the present work to study the effect of pulsating twin jets mixing region on the enhancement of heat transfer. Controllable characteristics twin pulsed jets were the main objective of our design. The variable nozzle-nozzle distance was considered to study the effect of two jets interaction at the mixing region. Also, the phase change between the frequencies of twin jets was taken into account to develop PTJM. All of these factors in addition to the ability of producing high velocity pulsed jet led to more appropriate design for a comprehensive study of multijet impingement heat transfer problems. The performance of PTJM was verified by measuring the pulse profile at frequency of 20 Hz, where equal velocity peak of around 64 m/s for both jets was obtained. Moreover, the jet velocity profile at different pulsation frequencies was tested to verify system performance, so the results revealed reasonable velocity profile configuration. Furthermore, the effect of pulsation frequency on surface temperature of flat hot plate in the midpoint between twin jets was studied experimentally. Noticeable enhancement in heat transfer was obtained with the increasing of pulsation frequency.
authors.affiliation: Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia ; Department of Mechanical Engineering, College of Engineering, University of Tikrit, Tikrit, Iraq.
authors.forename: Ali Ahmed
authors.identifier: 0000-0003-0863-887X
authors.initials: AA
authors.lastname: Gitan
authors.affiliation: Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia ; Department of Mechanical Engineering, College of Engineering, University of Tikrit, Tikrit, Iraq.
authors.forename: Rozli
authors.identifier: 0000-0002-4125-6163
authors.initials: R
authors.lastname: Zulkifli
authors.affiliation: Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia.
authors.forename: Shahrir
authors.initials: S
authors.lastname: Abdullah
authors.affiliation: Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia.
authors.forename: Kamaruzzaman
authors.identifier: 0000-0002-4675-3927
authors.initials: K
authors.lastname: Sopian
mesh_terms: D004867:Equipment Design; D006358:Hot Temperature