Nanofluid flow through a porous space with convective conditions and heterogeneous-homogeneous reactions

- Nanofluid saturates a porous medium.
- Heat transfer is accounted through convective conditions.
- Homogeneous-heterogeneous reactions are examined.
- Single wall (SWNTs) and multi wall (MWNTs) carbon nanotubes are treated as nanoparticles.

Present analysis deals with the nanofluid flow due to a cylinder. Heat transfer mechanism is inspected under the physically acceptable convective type conditions. A simple isothermal model of homogeneous-heterogeneous reactions is used to regulate the solute concentration. Thermodynamics processes of homogeneous-heterogeneous reactions analyze the effect of temperature phase changes, such as convection or evaporation. It is assumed that the base fluid (water) is essentially composed of single and multi walled carbon nanotubes. Uniformly valid convergent series expressions are obtained with the help of optimal homotopic approach. Impacts of embedded flow parameters are visualized through graphical illustrations. Fluid velocity displays decreasing trend near the cylinder as the curvature parameter is incremented. Interestingly, such result is not preserved far from the cylinder. The simulations predict that wall heat flux is inversely proportional to both curvature parameter and the convecting heating strength. However, value of heat flux is predicted to be larger in case of larger volume fraction of carbon nanotubes. Moreover heat transfer coefficient is more in single wall carbon nanotubes (SWCNTs) when compared with multi wall carbon nanotubes (MWCNTs). Heterogeneous and homogeneous reactions have opposite behaviors on nanoparticle concentration distribution. Drag coefficient at the cylinder enhances when larger curvature parameter is accounted. Comparison of present study with previous published work is given. The results are found in good agreement.

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