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|Title:||Nucleate pool boiling of aqueous solution of citric acid on a smoothed horizontal cylinder|
|Citation:||Heat and Mass Transfer: Waerme- und Stoffuebertragung, 2012; 48(4):611-619|
|Mohammad Mohsen Sarafraz|
|Abstract:||Nucleate pool boiling heat transfer coefficients were measured during pool boiling of the mixtures of Citric acid/water on a horizontal heated Cylinder. The experiment was done at atmospheric pressure and heat fluxes up to 113 kW m−2 and mass fraction range 0.1496–0.613 over all ranges of mass fraction, the heat transfer coefficients of the mixtures are markedly less than those in single component substances and, in particular, are dramatically deteriorated in the vicinity of both single component substances. An applicability of existing correlations to the present experimental data is discussed. As a result, it is difficult for any existing correlation to predict the true values of pool boiling heat transfer coefficients over all ranges of mass fraction in mixtures of citric acid/water. Available correlation results were not exactly adapted to experimental data and for the best estimation, a new modified model based on Stephan-Kroner has been achieved with reasonable accuracy. Also the status of bubble generation showed that nucleation site density is strictly functioning of heat flux.|
|Rights:||© Springer-Verlag 2011|
|Appears in Collections:||Mechanical Engineering publications|
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