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Title: Turbulent impinging jet heat transfer enhancement due to intermittent pulsation
Authors: Xu, P.
Yu, B.
Qiu, S.
Poh, H.J.
Mujumdar, A.S. 
Keywords: Convective heat transfer
Intermittent pulsation
Nusselt number
Pulsed impinging jet
Issue Date: Jul-2010
Citation: Xu, P., Yu, B., Qiu, S., Poh, H.J., Mujumdar, A.S. (2010-07). Turbulent impinging jet heat transfer enhancement due to intermittent pulsation. International Journal of Thermal Sciences 49 (7) : 1247-1252. ScholarBank@NUS Repository.
Abstract: A numerical study was carried out of heat transfer under a pulsating turbulent slot impinging jet. The jet velocity was varied in an intermittent (on-off) fashion. The effects of the time-mean jet Reynolds number, temperature difference between the jet flow and the impinging surface, nozzle-to-target distance as well as the frequency on heat and mass transfer were examined. The numerical results indicate significant heat transfer enhancement due to intermittent pulsation of the jet flow over a wide range of conditions for both cooling and heating cases. Simulations of the flow and temperature fields show that the instantaneous heat transfer rate on the target surface is highly dependent on the hydrodynamic and thermal boundary layer development with time. © 2010 Elsevier Masson SAS. All rights reserved.
Source Title: International Journal of Thermal Sciences
ISSN: 12900729
DOI: 10.1016/j.ijthermalsci.2010.01.020
Appears in Collections:Staff Publications

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