FEM computations and Taguchi optimization in nonlinear radiative MHD MWCNT-MgO/EG hybrid nanoliquid ?ow and heat transfer over a 3D wedge surface

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The problems concerning to heat transport in hybrid nanofluids on a wedge surfaces are of great interest due to their relevance in applications such as solar panels, drying processes, cooling of electronic equipment, heat exchangers, and air heaters. Therefore, the present study explores the nonlinear thermal radiative heat transport features and three-dimensional rheological characteristics of MWCNT-MgO/EG hybrid nanofluid flowing over a wedge considering the variable magnetic field, and multiple slip boundary conditions. The single-phase model comprising of the experimental data with their dependency on temperature and nanoparticle weight fraction is used for thermal conductivity and viscosity of composite nanomaterial. Rosseland and Boussinesq approximations are accounted. The wedge surface is maintained at thermal jump condition, whereas the ambient state is considered at a constant temperature. The governing conservation laws are transformed into a system of ordinary differential equations via space type similarity transformations, and then are solved using the Galerkin finite element method. The L16 orthogonal array-based Taguchi method is applied to determine the optimal setting of governing parameters are determined for maximum heat transport rate. The contribution of physical parameters in the enhancement of heat transport rate is also estimated. The temperature jump condition has the maximum contribution (51.72%), among the selected four physical parameters whereas the nanoparticle weight fraction has the least (10.02%). The nonlinear thermal radiation has the maximum heat transfer rate compared to the linear one.

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Case Studies in Thermal Engineering



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