Entropy generation analysis and effects of slip conditions on micropolar fluid flow due to a rotating disk

• Main Authors: Khan Najeeb Alam, Naz Farah, Sultan Faqiha
• Format: Article
• Language: English
• Published: De Gruyter 2017-09-01
• Series: Open Engineering
• Subjects: micropolar; anisotropic slip; entropy generation; rotating disk; axisymmetric
• Online Access: https://doi.org/10.1515/eng-2017-0025

This article deals with the investigation of three-dimensional axisymmetric steady flow of micropolar fluid over a rotating disk in a slip-flow regime. Further, the generation of entropy due to heat transfer and fluid friction is identified. It is noticed that the entropy generation can be decreased and controlled in the presence of slip. The anisotropic slip has vital characteristics and it has a great influence on the flow field and heat transfer. The von Kármán similarity transformation is used to establish the equations governing the flow and heat transfer characteristics of the fluid. The impact of some important parameters on velocity profiles, angular velocity (microrotation) and energy distribution is discussed and illustrated through graphs and tables. The effects of physical parameters on the entropy generation and Bejan numbers are also presented graphically. In addition, the most favorable agreement is observed among the results of the present study and those of the earlier studies.