Session: 12-21-01: Multiphase Flow

Paper Number: 165852

Magnetohydrodynamic Darcy-Forchheimer MWCNT-MoS2/Micropolar Hybrid Nanofluid Flow Over Stretching/Shrinking Sheet With Thermal Radiative and Heat Source/Sink 

The study of hybrid nanofluids (HNFs) has gained significant attention due to their advanced thermal properties and wide applications in modern science and technology. In this research, a comprehensive numerical investigation is conducted on the two-dimensional, steady, incompressible Darcy-Forchheimer magnetohydrodynamic (MHD) flow of MWCNT-MoS₂/micropolar water-based hybrid nanofluid over a stretching and shrinking sheet. The effects of heat source/sink, thermal radiation, chemical reaction, convective heat transfer, and porous medium resistance are incorporated to analyze the heat and mass transfer characteristics of the fluid flow. The governing partial differential equations (PDEs) describing the conservation of mass, momentum, angular momentum, energy, and concentration are transformed into a system of ordinary differential equations (ODEs) using similarity transformations. These ODEs are solved numerically via the shooting method implemented in Maple software, ensuring accurate and reliable results.

A key finding of the study is the existence of dual solutions, which emerge due to the nonlinearity of the governing equations. To determine the physical feasibility of these solutions, a stability analysis is performed using the bvp4c solver in MATLAB. The results confirm that only the first solution is stable and physically valid, while the second solution is unstable and not realizable in practical applications.

The study further examines the impact of various physical parameters on skin friction, couple stress, Nusselt number, and Sherwood number, along with velocity, microrotation, temperature, and concentration profiles. The findings indicate that an increase in the nanoparticle volume fractions enhances the skin friction coefficient and couple stress for stretching sheets (λ > 0), but reduces them in the case of shrinking sheets (λ < 0). Additionally, a higher volume fraction of nanoparticles lowers the Nusselt number, implying a reduction in heat transfer efficiency, while simultaneously increasing the Sherwood number, suggesting an enhancement in mass transfer.

The velocity profile is found to increase with a rise in nanoparticle volume fractions but decreases with increasing micromaterial parameter (n), Darcy-Forchheimer number (Fr), and suction parameter (S). Similarly, the microrotation profile exhibits an increasing trend with Darcy-Forchheimer number and micropolar parameter but decreases with a rise in the micro-material parameter. The temperature profile is elevated with an increase in Biot number (Bi), thermal radiation (Rd), and nanoparticle volume fractions, whereas it declines with increasing Prandtl number (Pr) and suction parameter (S). The concentration profile decreases with a higher Schmitt number (Sc), chemical reaction parameter (Q), and suction (S).

The findings of this study provide crucial insights into heat and mass transfer mechanisms in hybrid nanofluids, contributing to the design of efficient thermal management systems in heat exchangers, cooling devices, energy storage systems, and industrial applications.

Keywords: Hybrid nanofluid, Micropolar, Nanoparticles, Thermal radiation, Convective heat transfer.

Presenting Author: Kishwat Ijaz Malik Montana State University

Presenting Author Biography: Kishwat Ijaz Malik is a Mechanical Engineer and PhD researcher at Montana State University, specializing in advanced manufacturing, computational modeling, and machine learning applications in engineering. With a strong academic foundation, he holds an MS in Mechanical Engineering from UET Taxila and a BS from HITEC University, complemented by extensive experience in research, teaching, and industry collaborations.

His research interests span additive manufacturing, fluid dynamics, and structural analysis, with multiple peer-reviewed publications in prestigious journals and conferences. As a former Research Assistant at Nazarbayev University, he played a key role in projects involving 3D printing technologies, gear accuracy analysis, and fluid-solid interactions in journal bearings. Additionally, his tenure as a Lecturer at NUTECH University saw him lead curriculum development, lab establishment, and industry collaborations while mentoring students in cutting-edge engineering projects.

Authors:

Muhammad Imran Anwar University of Sragodha
Hazoor Bux Sindh Higher Education Department
Kishwat Ijaz Malik Montana State University