Heat transfer and entropy production analysis of Casson nanofluid under cylindrical stretching motion in the existence of aggregates nanoparticles

Abstract

This paper focuses on the heat transfer and entropy production of the Casson nanofluid under cylindrical stretching motion in the case of nanoparticle aggregation. Calculations derived from the BVP4C numerical solution were utilized in the study to verify the accuracy of the calculations in comparison with previous results. The results showed that when the nanoparticle volume fraction was increased from 1% to 3%, the heat transfer efficiency improved by 2.72% in the absence of nanoparticle aggregation, while the heat transfer efficiency improved by 12.42% in the existence of nanoparticle aggregation. It is also found that the existence of aggregation of nanoparticles significantly increased the heat transfer capacity and flow resistance of the Casson nanofluid compared to the absence of aggregation. The results of this study can provide important theoretical support for applications in thermal management of stretched cylinders, biomedical drilling, and other fields.