A Numerical Investigation of Nanocomposite of Copper and Titanium Dioxide in Water Based Fluid Influenced by Instigated Magnetic Region

Presence of external electrical field plays a vital role in heat transfer and fluid flow phenomena. Keeping this in view present article is a numerical investigation of stagnation point flow of water based nanoparticles suspended fluid under the influence of induced magnetic field. A detailed comparative analysis has been performed by considering Copper and Titanium dioxide nanoparticles. Utilization of similarity analysis leads to a simplified system of coupled nonlinear differential equations, which has been tackled numerically by means of shooting technique followed by Runge-Kutta of order 5. The solutions are computed correct up to 6 decimal places. Influence of pertinent parameters is examined for fluid flow, induced magnetic field, and temperature profile. One of the key findings includes that magnetic parameter plays a vital role in directing fluid flow and lowering temperature profile. Moreover, it is concluded that Cu-water based nanofluid high thermal conductivity contributes in enhancing heat transfer efficiently.

Nano-alumina based(alpha and gamma)drilling fluid system to stabilize high reactive shales

Most of water based drilling fluids easily penetrate into shale formations and cause serious problems such as well instability,destruction of the formation,wall pipe folding and pipe adhesion.The present research aims to assess the effects of alumina nano-particles(alpha and gamma)on shale/clay stability due to the unique specifications of alumina(alpha and gamma)nano particles.The SEM,XRD,EDAX and AFM analyses of recovered shale samples indicate that the average size of alpha alumina nano-particles coating the shale surface and the pores existing in the shale is between 25 and 35 nm,whereas the average size of gamma alumina nano-particles coating the shale surface and the pores present in the shale is between 20 and 30 nm.In addition,samples recovered by nano-alpha reveal more porosity remained in the shale sample in comparison with the nano-gamma nano-sample.Furthermore,the results obtained from EDAX illustrate a suitable nano-gamma alumina over the recovered shale.The experiment with five types of drilling fluid without the presence of potassium chloride as an inhibitor salt designed.Thus,the water based drilling fluid containing nano-gamma alumina with less than 1%wt was chosen as the best sample.Generally,the presence of alumina nano-particles optimizes the stability of formations containing ions like shale.

Melting Heat in Radiative Flow of Carbon Nanotubes with Homogeneous-Heterogeneous Reactions

The present article provides mathematical modeling for melting heat and thermal radiation in stagnationpoint flow of carbon nanotubes towards a nonlinear stretchable surface of variable thickness. The process of homogeneousheterogeneous reactions is considered. Diffusion coefficients are considered equal for both reactant and autocatalyst.Water and gasoline oil are taken as base fluids. The conversion of partial differential system to ordinary differential system is done by suitable transformations. Optimal homotopy technique is employed for the solutions development of velocity, temperature, concentration, skin friction and local Nusselt number. Graphical results for various values of pertinent parameters are displayed and discussed. Our results indicate that the skin friction coefficient and local Nusselt number are enhanced for larger values of nanoparticles volume fraction.