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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/11186
Title: Determination of rewetting on hot horizontal surface with water jet impingement through a sharp edge nozzle
Authors: Agrawal C.
Kumar R.
Gupta, Akhilesh Kumar
Chatterjee B.
Published in: International Journal of Thermal Sciences
Abstract: The rewetting phenomenon was experimentally investigated for the hot horizontal stainless steel surface of 0.25 mm thickness and 800 ± 10 C initial surface temperature. The round water jet of 2.5 mm diameter at 22 ± 1 C temperature was injected through a sharp edge nozzle. The investigation was done for the stagnation point to 12 mm (≈5d) radial distance and jet Reynolds number varied in the range of 5000-24,000. The rewetting phenomena during the transient cooling was accessed on the basis of rewetting temperature, wetting delay, wetting speed and maximum surface heat flux. It has been observed that with rise in jet Reynolds number, the rewetting performance increased for the entire measured spatial locations. However, for downstream region the surface rewetting has been delayed and occurred at the reduced surface temperature as compared to the stagnation region. The maximum surface heat flux is the highest at the stagnation point and in a range of 2.1-2.45 MW/m2. The correlation developed for the wetting front speed predicts 85 percent of experimental data within an error band of ±20 percent and the correlation for maximum surface heat flux predicts 90 percent of experimental data within an error band of ±10 percent. © 2013 Elsevier Masson SAS. All rights reserved.
Citation: International Journal of Thermal Sciences (2013), 71(): 310-323
URI: https://doi.org/10.1016/j.ijthermalsci.2013.03.010
http://repository.iitr.ac.in/handle/123456789/11186
Issue Date: 2013
Keywords: Jet impingement
Maximum heat flux
Nusselt number
Rewetting
Stagnation
Wetting delay
ISSN: 12900729
Author Scopus IDs: 55224918500
55389796000
55491955100
7201648525
Author Affiliations: Agrawal, C., Department of Mechanical Engineering, College of Technology and Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur 313001, Rajasthan, India
Kumar, R., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttranchal 247667, India
Gupta, A., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttranchal 247667, India
Chatterjee, B., Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai 400085, India
Funding Details: First author is grateful to the AICTE , New Delhi, QIP Centre , IIT Roorkee and CTAE , Udaipur for their financial support and permission to carry out research work at IIT Roorkee.
Corresponding Author: Kumar, R.; Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttranchal 247667, India; email: ravikfme@iitr.ernet.in
Appears in Collections:Journal Publications [ME]

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