Axisymmetric flow in an expanding and contracting Darcy radiated walls with suspension of composite‐solid nano mixtures of various conductivity and viscosity models: A simple linear regression analysis

Abstract In comparison to mono‐fluids, hybrid fluids have better energy transfer qualities. These materials are used in a variety of applications, including military equipment and solar collectors. Nothing is known about the dynamics of chemically reactive graphene and water‐copper oxide and aluminum oxide hybrid nanofluids across a permeable plate when heat radiation and Darcy are considerable. In light of these concerns, this work performs a theoretical analysis of the flow and heat performance characteristics of a hybrid nanofluid in contracting or expanding porous plates with permeabilities under the impact of thermal radiation and partial slip. The density and conductivity of the Ternary fluid 1 (Graphene, aluminum oxide, and copper oxide) are measured in spherical, platelet, and cylindrical configurations. Because the elevated principal classification is an extremely nonlinear PDEs, similarity transformations were used to convert it to an ordinary differential system, which was then explained with the solver bvp5c in MATLAB. For two situations of ternary mixes of manufacturing attention, friction factor and rate of heat transfer values were also determined. The possessions of a diversity of growing parameters on temperature and velocity (axial) disseminations have inspected. The outcomes of the present investigation are matched previously existing literature. The rate of skin friction is decreasing in contracting walls case with rates of (−102.116449 & −0.680263) and raising in expanding walls case with rate of (30.236326 & 1.27381) whereas improvement in the Nusselt number observed at the lower plate in both cases with rate of 22.195298 and 12.526747 with existing of partial slip. With the decline in the permeability parameter (0 to −1) the velocity field transform from most asymmetric shape to symmetric shape.