Study of thermophoresis and Brownian motion phenomena in radial stagnation flow over a twisting cylinder

Study of thermophoresis and Brownian motion phenomena in radial stagnation flow over a twisting cylinder

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This article deals with the analysis of nanofluid flow and its thermal energy transport in the stagnation region, impinged radially on a rotating circular cylinder with magnetohydrodynamic (MHD) effect.The swirling flow is driven by the rotational motion of a circular cylinder along the z-direction.A two-phase nanofluid model, namely the Buongiorno model is utilized to determine the thermal characteristics of nanoparticles, which highlights the influence of Brownian diffusion and thermophoresis on temperature and concentration distributions.Numerical outcomes are computed by applying the built-in program bvp5c in MATLAB.The focus of this manuscript is to determine the numerical interpretations of wall stresses with their asymptotic behavior, Nusselt number, and Sherwood number against relevant moen rothbury faucet parameters.

The axial and azimuthal wall stress parameters are obtained as a function of twist rate at various values of Reynolds number.Furthermore, the asymptotic behavior for small Reynolds number is compared with their corresponding numerical solutions.The comparison of our result as a special case for non-electrically here conducting flow is found in exact agreement with the ones in the literature.It is noticed that wall stresses are greatly affected due to an increment in Reynolds number.The thermal and mass transport phenomena is reduced due to increment in the twisting rate of the cylinder.

However, the momentum of the system is inclined, and consequently, an increase in the axial and azimuthal velocities is observed.Moreover, the numerical values of heat and mass transfer rates deteriorate because of thermophoresis; however, owing to the Brownian diffusion, the former declines, and the latter progress significantly.