Second law analysis of magnetized Casson nanofluid flow in squeezing geometry with porous medium and thermophysical influence

Journal of Taibah University for Science

A. O. Ajibade¹  M. M. Awad²  I. Rashidi³  M. M. Rashidi⁴  M. T. Akolade⁵ 

[1] Ahmadu Bello University;Mansoura University;Quchan University of Technology;University of Electronic Science and Technology of China;University of Ilorin;

关键词: casson nanofluid;    entropy generation;    thermo-physical effect;    porous media;    bejan number;   

DOI  :  10.1080/16583655.2021.2014691

来源: DOAJ

【 摘 要 】

This flow investigation analysed the entropy generation rate as an additional enrichment to the rate of heat transfer in Casson nanofluid flow between squeezing disks. The flow is modelled mathematically in PDEs systems, transformed into systems of ODEs via a well-posed transformation, and then solved. In a limiting case, good agreement of the numerical results is achieved. The assumption of variable fluid properties was seen to downsize the fluid velocity and temperature fields but enriches the nanoparticle volume fraction. Entropy number remarkably minimized for thermophysical properties, yield stress, and squeezing impact, while nanoparticle parameters, thermal diffusivity, and viscous dissipation contributed significantly to the system disorderliness. Moreover, findings reveal that thermal irreversibility controls the flow system in the entire channel (approximately $ 0.3 \lt \eta \le 1 $ ) except near the fixed disk where the other irreversibility dominated. Prandtl, Eckert, and Darcy's number help facilitate the irreversibility distribution phenomenon. With nanoscale mechanism modification nanoparticle volume fraction and energy distributions can easily be achieved.

【 授权许可】

Unknown