Cattaneo-Christov heat flow analysis of hydromagnetic micropolar nanofluid over a chemically activated permeable stretching sheet

Abstract

Several engineering and technological processes, such as air conditioning, machinery power collectors, food processing, refrigeration, and heat exchangers, need deep investigation of energy and mass transfer in various conditions. As a result, in this paper, we analyze the radiative flow of a hydromagnetic micropolar nanofluid with activation energy and chemical reaction using the Cattaneo-Christov energy flux model over an expanding porous sheet. Further, the consequences of suction, energy generation, and convective boundary conditions were also examined. Boundary layer approximation is utilized to obtain the primary partial differential equations of the model and reduced to nonlinear ordinary differential equations, using the appropriate transformations, the model equations are formulated for numerical simulation and further analysis. Using the inbuilt BVP5C function available in MATLAB, the numerical solutions for the coupled system of the nonlinear ordinary differential equations are obtained. Further, graphical and tabular representations are used to analyze the impacts of several physical parameters on the concentration, velocity, temperature, and microrotation fields. The outcomes reveal that the velocity and microrotation of the micropolar liquid movement are improved by increasing the magnetic and material parameters. An increase in the concentration Grashof number, thermal relaxation parameter, and temperature Grashof number leads to a reduction in the temperature distribution within the thermal boundary layer. Furthermore, the mass transfer rate is directly proportional to the thermophoresis and chemical reaction parameters.