Irreversibility process analysis for SiO2-MoS2/water-based flow over a rotating and stretching cylinder

Abstract

Entropy is the measure of the amount of energy in any physical system that is not accessible for the useful work, which causes a decrease in a system’s thermodynamic efficiency. The idea of entropy generation analysis plays a vital role in characterizing the evolution of thermal processes and minimizing the impending loss of available mechanical power in thermo-fluid systems from an analytical perspective. It has a wide range of applications in biological, information, and engineering systems, such as transportation, telecommunication, and rate processes. The analysis of the entropy generation of axisymmetric magnetohydrodynamic hybrid nanofluid [Formula: see text]/water flow induced by rotating and stretching cylinder in the presence of heat radiation, ohmic heating, and the magnetic field is focus of this study. Thermal energy transport of hybrid nanofluids is performed by applying the Maxwell model. Heat transport is carried out by using convective boundary condition. The dimensionless ordinary differential equations are acquired by similarity transformations. The numerical solution for these differential equations is obtained by the bvp4c program in MATLAB. A comparison between nanofluid and hybrid nanofluid is made for flow field, temperature, and entropy generation. Comparison of nanofluid flow with hybrid nanofluid flow exhibits a higher rate of heat transmission, while entropy generation exhibits the opposite behavior. It is observed that the flow and heat distribution increase as the solid volume fraction’s value grows. An increase in entropy is indicated by augmentation in the Brinkman number and temperature ratio parameter, but the Bejan number shows a declining trend. Furthermore, outcomes of the Nusselt number for hybrid nanofluid and nanofluid are calculated for various parameters. It is noticed that the Nusselt number is reduced for enlarging the magnetic field and Eckert number. The axial and azimuthal wall stress parameters are declined by augmenting the Reynolds number.

Flow and Heat Transfer of CoFe2O4-Blood Due to a Rotating Stretchable Cylinder under the Influence of a Magnetic Field

“…Hayat et al [8] explored three-dimensional MHD flow with viscous dissipation and joule heating. Using the bvp4c approach, which is a finite difference code that implements the three-stage Lobatto IIIa formula in MATLAB (Version 2018b), Khan et al [9] studied the steady SiO 2 -MoS 2 /water hybrid nanofluid flow induced by a rotating and stretching cylinder. They found that azimuthal and wall stress characteristics decrease with increasing values of Reynolds number, whereas heat and flow distributions increase as the volume percentage of solid particles increases.…”

“…As a result, the rotational velocity of magnetic particles in the base fluid is different from the vortices in the flow domain. Considering the above assumptions and extending the work of [6,9,[32][33][34][35], the conservation of mass, momentum, and energy equations are expressed as: Considering the above assumptions and extending the work of [6,9,[32][33][34][35], the conservation of mass, momentum, and energy equations are expressed as:…”

Entropy generation analysis of CNT‐based nanofluid flows induced by a moving plate

“…The paper concludes that using MWCNT nanofluids can reduce the thermodynamic irreversibility in heat transfer processes, leading to more efficient heat transfer. References [18] and [19] are particularly notable for their investigations of entropy generation in various thermal systems.…”

Impact of Reynolds number in modulating wall stresses in radial stagnation-point flow

“…Two different forms of hybrid nanofluids were used in a flattened tube and compared in terms of their heat transmission abilities and degree of thermodynamic irreversibility by Huminic and Huminic [22]. The irreversibility process study for SiO 2 -/ MoS 2 water-based flow through a rotating and stretching cylinder was researched by Khan et al [23]. Further interesting studies regarding thermal analysis are given in [24] and [25].…”