Thermophoresis and Brownian motion effects of nanoparticles on a non -Newtonian fluid flow : A numerical study

In this article, an efficient numerical approach has been utilized to investigate the effect of adding nanoparticles to the MHD (magnetohydrodynamics) non-Newtonian fluid. The geometry of the problem is such that the flow passes through the porous medium between two tubes and these two tubes are coaxial. This problem has many applications, the most important of which can be mentioned in biomedical and chemical sciences. A comparison of the applied procedure outcomes with the results of a published work showed that the present method is very accurate and can be easily applied to non-linear problems, especially thermal engineering. From the obtained results, it can be realized that the nanoparticle concentration enhances the by increasing the thermophoresis parameter (Nt). In addition, increasing the magnetic field intensity leads to reduced velocity values. Also, it can be found that with the increase of the Nt parameter, the velocity rises a little, which is not very significant. In terms of quantitative evaluation, it can be concluded that by elevating the Nt from ۰.۶ to ۱.۲, the temperature increases by ۱۷.۴%.

کلیدواژه ها:

Thermophoresis ، Non-Newtonian fluid ، Nanoparticle ، Magnetic field ، Brownian motion