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Numerical Simulation and Experimental Investigation of Conjugate Heat Transfer between a Turbulent Hot Air Jet Impinging on a Cookie‐shaped Object
Author(s) -
NITIN N.,
KARWE M. V.
Publication year - 2004
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.2004.tb15510.x
Subject(s) - jet (fluid) , mechanics , heat transfer coefficient , turbulence , nozzle , body orifice , heat transfer , computer simulation , materials science , thermodynamics , physics , mechanical engineering , engineering
ABSTRACT: Numerical simulation of the flow field and conjugate heat transfer for a turbulent jet impinging on the surface of a model cookie were carried out at different nozzle‐to‐plate spacings. Numerical predictions were compared with the experimental results on average and the local heat‐transfer coefficient. Results indicated good agreement between the numerical and experimental results over the range of jet velocities, that is, 10 to 40 m/s, which corresponds to Reynold's number range of 7500 to 32000 based on the jet orifice diameter. Numerical simulation also confirmed that the surface heat‐transfer coefficient was independent of the thermo‐physical properties of the cookie. The local heat‐transfer coefficient on the top surface of the cookie was highest at the center of the impinging jet.