Impinging jets – a short review on strategies for heat transfer enhancement

¹ CAMBI, Technical University of Civil Engineering in Bucharest, Building Services Faculty, 020396, Bucharest, Romania
² Technical University of Cluj Napoca, Mechanical Engineering Faculty, Cluj-Napoca, Romania

^* Corresponding author: ilinca.nastase@utcb.ro

Abstract

In industrial applications, heat and mass transfer can be considerably increased using impinging jets. A large number of flow phenomena will be generated by the impinging flow, such as: large scale structures, large curvature involving strong shear and normal stresses, stagnation in the wall boundary layers, heat transfer with the impinged wall, small scale turbulent mixing. All these phenomena are highly unsteady and even if nowadays a substantial number of studies in the literature are dedicated, the impinging jets are still not fully understood due to the highly unsteady nature and more over due to great difficulty of performing detailed numerical and experimental investigations.