Heat and mass transfer characteristics in peristaltic Rabinowitsch nano-fluid passing through a non-uniform tube with temperature dependent variable fluid properties

This paper gives a quantitative examination of peristaltic flow in a non-uniform tube, which includes temperature-dependent fluid characteristics and second-order slip conditions. The research uses the Rabinowitsch fluid model to describe non-Newtonian behaviour, while Buongiorno's nanofluid model characterises the fluid's thermophysical characteristics. To answer the current physical puzzle, a set of highly nonlinear equations must be translated utilising nondimensional parameters and fundamental assumptions such as a low Reynolds number and a long wavelength. The Optimal Homotopy Analysis Method (OHAM) is used to develop the solution.. We examine the impact of various physiological limitations through the generation of graphs. The graphs presented here demonstrate how various parameters affect Nusselt number, Sherwood number, temperature, velocity, concentration, skin friction, and streamlines. As a consequence of the Lorentz force, the current investigation found that the axial velocity reduces as M n increases. The fluid's shear-thinning behaviour causes axial velocity to drop as slip parameters rise. The findings provide practical insights for enhancing heat transfer efficiency in industrial applications, particularly in systems utilizing non-Newtonian nanofluids, such as chemical processing and microfluidic devices.