Numerical investigation of thermal and solutal interaction in MHD peristaltic transport of a tangent hyperbolic nanofluid with viscous dissipation and thermal radiation

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Abstract
Purpose: The study aims to investigate the effects of multi-slips on the peristaltic pumping of a tangent hyperbolic nanofluid through an inclined magnetic field, thermal radiation and double-diffusive convection, with emphasis on thermal and mass conservation characteristics. Design/methodology/approach: A mathematical model describing the nonlinear flow is formulated by incorporating magnetohydrodynamic effects, slip boundary conditions, thermal radiation and double-diffusive convection. The governing flow equations are first reduced to a system of nonlinear differential equations and then solved numerically using the NDSolve function in Mathematica. Interpolating functions are employed to get velocity, temperature, nanoparticle concentration and solutal profiles, while the Nusselt and Sherwood numbers are computed to assess heat and mass exchange rates. Findings: The analysis reveals that the flow exhibits velocity reversal under variation of the Prandtl number, solutal Grashof number and thermal radiation, whereas the velocity slip factor speed up the flow near the boundaries. The fluid temperature decreases by increasing the Weissenberg number and thermal radiation but increases for higher values of thermal slip parameter. Furthermore, it is observed that the buoyancy and viscous effects significantly enlarge the trapped bolus which indicates enhanced fluid entrapment. The calculated Nusselt and Sherwood numbers demonstrate the sensitivity of thermal and mass transport to the governing physical parameters. For the validation and convergence, a comparison with previous results is made as a limiting case of present study and found in good agreement. Originality/value: This study presents a novel analysis of tangent hyperbolic nanofluid peristaltic flow by incorporating slip effects, oblique magnetic field, thermal radiation and double diffusion.

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