Exact(5)
The average Nusselt number values have also been interpreted in terms of the usual Colburn heat transfer factor (j).
Further, in the calculation of the convective heat transfer coefficient, the Colburn heat transfer factor and Fanning friction factor are generally obtained using empirical equations.
The heat transfer factor depends not only on the particle Reynolds number but also on the void fraction of the bed.
The results show that the 20°TCO scheme possesses the best market application value for its highest shell-side heat transfer factor jo and average comprehensive index (jo/fo).
A genetic algorithm (GA) combined with orthogonal design is used to search for the optimal overall structure and the correlations about the fin heat transfer factor j and the friction factor f. The maximum total heat transfer rate and the minimum total pressure drop are taken as objective functions in the GA, respectively.
Similar(55)
The correlations of heat transfer Colburn factor and friction factor for the MEE are fitted in terms of Reynolds number based on the experimental results.
This review covers the synthesis of hybrid nanoparticles, preparation of hybrid nanofluids, thermal properties, heat transfer, friction factor and the available Nusselt number and friction factor correlations.
The validation results show that, the predicted droplet behaviors can qualitatively agree with the visualization images; the predicted mass transfer j factor agrees with 89% of the experimental data within a deviation of ±25%, and the predicted heat transfer j factor agrees with 94% of the experimental data within a deviation of ±20%.
Correlation equations were developed for the heat transfer, friction factor and enhancement efficiency.
Heat transfer, friction factor and exergy loss correlations were obtained according to the experimental results.
Stagnation heat transfer augmentation factor in the range of 1.2 2.8 times of the air-jet level is achieved.
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