Analysis of thermal and concentration transport in unsteady MHD squeezing nanofluid flow under the influence of chemical reaction and joule heating

This research investigates the unsteady magnetohydrodynamic (MHD) squeezing flow of a viscous incompressible nanofluid enclosed between two parallel plates and affected by an inclined magnetic field. Suction/injection at the lower plate is also considered to enhance control over the flow. Such flow occurs in microfluidics, lubrication, material processing, and cooling devices, which indicates the need to introduce transport mechanisms at small scales. The flow is driven by the motion of the lower plate translating in its own plane, while the upper plate moves perpendicularly. The flow governing equations are converted to a set of coupled, nonlinear ordinary differential equations through similarity transformations. These reduced equations are then numerically solved using the bvp4c MATLAB solver. Validation is achieved for the obtained outcomes by comparing with existing literature. The study presents comprehensive parametric analyses of velocity, temperature, and concentration profiles through their graphical representations under varying parameter conditions. When the squeezing parameter increases, the velocity profile improves in both suction and injection cases. For the Schmidt parameter (0.1 ≤ Sc≤ 1.0), the concentration profile decreases ϕ(η = 0.3) = 0.200695 to ϕ(η = 0.3) = 0.163544) in the injection case. The temperature profile enhances, but the concentration profile declines when distance parameter goes from δ=0.1 to δ=0.8. Furthermore, detailed analyses of skin friction, Nusselt number, and Sherwood number are provided at both plates to offer more profound insights into the physical phenomena, with potential implications for applications in microfluidic systems, cooling technologies, and industrial fluid processes.