Abstract
A numerical study on boundary layer flow behaviour, heat and mass transfer characteristics of a nanofluid over an exponentially stretching sheet in a porous medium is presented in this paper. The sheet is assumed to be permeable. The governing partial differential equations are transformed into coupled nonlinear ordinary differential equations by using suitable similarity transformations. The transformed equations are then solved numerically using the well known explicit finite difference scheme known as the Keller Box method. A detailed parametric study is performed to access the influence of the physical parameters on longitudinal velocity, temperature and nanoparticle volume fraction profiles as well as the local skin-friction coefficient, local Nusselt number and the local Sherwood number and then, the results are presented in both graphical and tabular forms.
Highlights
The industrial processes like hot rolling, wire drawing, spinning of filaments, metal extrusion, crystal growing, glass fibre production, paper production, cooling of a large metallic plate in a bath, which may be an electrolyte, etc. to require the study of flow and heat transfer over a stretching surface
Metals (Al, Cu), oxides (Al2O3, TiO2 and CuO), carbides (SiC), nitrides (AlN, SiN), or nonmetals and conductive fluids, such as water or ethylene glycol, or oil, other lubricants, bio-fluids, polymer solutions as base fluids are used in the manufacturing of nanofluids. 5% volume fraction of nanoparticles in these fluids ensure effective heat transfer enhancements which help them to exhibit enhanced thermal conductivity and the convective heat transfer coefficient compared with the base fluid
This paper provides the solution to the problem of flow and heat transfer of a nanofluid over an exponentially stretching porous sheet by considering the effect of chemical reaction, joule heating and thermal radiation parameters along with the suction parameter by adopting the Keller Box method
Summary
The industrial processes like hot rolling, wire drawing, spinning of filaments, metal extrusion, crystal growing, glass fibre production, paper production, cooling of a large metallic plate in a bath, which may be an electrolyte, etc. to require the study of flow and heat transfer over a stretching surface. (2015) Joule Heating and Thermal Radiation Effects on MHD Boundary Layer Flow of a Nanofluid over an Exponentially Stretching Sheet in a Porous Medium. Buongiorno and Hu [7] observed that convective heat transfer enhancement had been suggested to be due to the dispersion of the suspended nanoparticles, this effect was too small to explain the observed enhancement It is often assumed in the problems of boundary layer flow over a stretching surface that the velocity of the stretching surface is linearly proportional to distance from the fixed origin. This paper provides the solution to the problem of flow and heat transfer of a nanofluid over an exponentially stretching porous sheet by considering the effect of chemical reaction, joule heating and thermal radiation parameters along with the suction parameter by adopting the Keller Box method
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