Numerical modelling of electromagnetohydrodynamic (EMHD) radiative transport of hybrid Ti6Al4V-AA7075/H2O nanofluids from a Riga plate sensor surface

Reddy, M.G.; Tripathi, D; Beg, O. A.; Tiwari, AK

Abstract

A Riga plate is special electromagnetic magnetic sensor surface which can be exploited in numerous technologies including nuclear reactor heat transfer control. Although developed for conventional viscous fluids, the Riga plate system may be improved via the use of magnetic nano-liquids. Motivated by this, the current work examines the incompressible magnetohydrodynamic (MHD) Ti6Al4V-AA7075-H2O hybrid nanofluid two-dimensional boundary layer flow and heat transfer from a variable thickness vertical Riga plate is studied theoretically and numerically. Viscous dissipation, heat source and thermal radiation effects are included. The governing partial differential boundary layer equations are formulated by employing the mass, momentum and energy conservation laws and they are simplified into a non-linear system of coupled ordinary differential equations with associated wall and free stream boundary conditions via appropriate scaling similarity transformations. The transformed nonlinear coupled boundary value problem is solved computationally with the bvp4c numerical function in MATLAB. The physical impacts of key emerging parameters on all key thermal and hydrodynamic characteristics i. e. velocity, temperature, skin friction factor and reduced Nusselt number are computed, and results are presented as graphs and tables. Validation is included for several special cases with earlier studies in the literature. The velocity of hybrid nanofluid f'(η) is enhanced with increment in modified Hartmann magnetic number Q. Hybrid nano fluid temperature is depleted with an increase in thermal Grashof number Gr. An augmentation of fluid temperature is observed with a boost in thermal radiation. In addition, the rate of heat transfer 〖Nu)x of the unitary (mono) nanofluid is significantly lower than that obtained with the hybrid nanofluid. Hybrid nanofluids are demonstrated to achieve significant benefits in thermal management of relevance to hybrid thermal reactors and advanced micro-coolers utilizing magnetohydrodynamics.

Citation

Reddy, M., Tripathi, D., Beg, O. . A., & Tiwari, A. (2023). Numerical modelling of electromagnetohydrodynamic (EMHD) radiative transport of hybrid Ti6Al4V-AA7075/H2O nanofluids from a Riga plate sensor surface. In Nanomaterials and Nanoliquids: Applications in Energy and Environment (203-226). Springer. https://doi.org/10.1007/978-981-99-6924-1_12

• Acceptance Date: Oct 7, 2023
• Online Publication Date: Nov 16, 2023
• Publication Date: Nov 16, 2023
• Deposit Date: Oct 9, 2023
• Publisher: Springer
• Pages: 203-226
• Series Title: Advances in Sustainability Science and Technology
• Book Title: Nanomaterials and Nanoliquids: Applications in Energy and Environment
• ISBN: 978-981-99-6923-4
• DOI: https://doi.org/10.1007/978-981-99-6924-1_12