Entropy production on couple-stress hybrid nanofluid flow in a rocket engine nozzle with non-Fourier’s and non-Fick’s law

Abstract

At the industrial level, hybrid nanofluid plays a significant role in innovative technologies and engineering expedients. The current investigation focused on assessing heat and mass relocation concerned with the flow of a couple-stress hybrid nanofluid in a rocket engine nozzle with non-Fourier’s and non-Fick’s law. The amalgamation of spherical-shaped nanoparticles of CoFe 2 O 4 and MWCNT suspended in engine oil (ordinary fluid) are considered hybrid nanofluids. This study is unique because it includes entropy generation, viscous dissipation, thermal radiation, Thomson and Troian, thermal, and concentration slips. From the intended problem, the obtained partial differential equations were transfigured into ordinary differential equations with the help of resemblance conversion and then solved by bvp4c. The significant effects of influential physical parameters are investigated and presented by graphs and tables. The result shows that an increment in the couple-stress parameter upsurges the velocity of the fluid and entropy generation. An increase in the Thomson and Troian slip parameters, on the other hand, results in a decrease in the fluid’s velocity. Also, it is observed from the result that an increment in the thermal relaxation parameter reasons a decline in temperature distribution. Likewise, it is noticed from the study that the highest enhancement of heat relocation rate happens at a ( CoFe 2 O 4 + MWCNT ) nanoparticles volume fraction of 4 % (i.e. 66.12 % of the CoFe 2 O 4 nanoparticles). Also, the Brinkman number needs to be well-organized to minimize entropy production in the system.