Abstract
In this study, the entropy generation and exergy efficiency of turbulent flow through a twisted elliptical tube were investigated. The effects of the fluid properties, the aspect ratio (1.05-10.00) and the twist pitch ratio (4-200) were considered. The results indicated that the total dimensionless entropy generation increased whereas the exergy efficiency decreased as the twist pitch ratio increased. Moreover, the total dimensionless entropy generation decreased, whereas the exergy efficiency increased with an increase in the aspect ratio. The minimum total dimensionless entropy generation of 0.01 is obtained with an aspect ratio of 10.00 and a twist pitch ratio of 16.36.
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