A Model for Application of Chen's Boiling Correlation to a Standard Engine Cooling System

With the increase of specific power, in development of modern engines, also the demand on the cooling system has significantly increased. CFD analysis reveals the occurrence of localized boiling, since often the measured temperature distribution cannot be explained by convective heat transfer alone [ 1 ]. The requirement for highest heat transfer rates has led to the very promising concept of a controlled transition from pure convection to subcooled boiling in the critical thermal conditions [ 2 ]. However, computational fluid dynamics is still unable to represent boiling flow, while any boiling based strategy requires a right prediction of heat transfer rates on the coolant surface inside IC engines. Chen's heat transfer model for boiling region [ 1 , 2 , 4 , 6 ] is widely used today, to predict and compare the predicted heat transfer coefficients in circular and rectangular ducts with experimental results.

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See papers presented at 2008 SAE International Powertrains, Fuels and Lubricants Congress, June 2008, Shanghai, CHINA, Session: Heat Transfer

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