Study of ZnO-SAE50 over a radiated permeable exponentially elongating curved device subject to non-uniform thermal source and Newtonian heating

Abstract

Thermal analysis in nanolubricants is a topic of interest. The nanolubricants are uniform mixture of nanoparticles and oil. These fluids extensively use for thermal applications and friction reduction. Hence, the key objectives of this work to analyze the dynamics of ZnO-SAE50 through a curved surface. The traditional problem modified using novel effects of non-uniform thermal source, variable thermal conductivity, non-linear thermal radiations and Newtonian heating in the presence of convective condition. Further, enhanced properties of ZnO-SAE50 used to achieve the desired results. The physical results for the problem obtained through numerical approach (RK scheme coupled with shooting method). It is examined that the velocity enhances by increasing the curvature of the surface (K=5.0,10.0,15.0,20.0) while stronger Hartmann effects (M=0.1,0.5,0.9,1.3) and concentration of ZnO reduce the motion over the surface. The momentum boundary layer declines for S>0 as compared to S<0. Inclusions of non-uniform source enhanced the thermal transport while prominent increase is observed for Biot number (Bi=0.1,0.2,0.3,0.4). Further, the variable thermal conductivity (ϵ=0.1,0.2,0.3,0.4) and Newtonian heating have minimal variations in the temperature. Thermal radiations and ϕ improve the temperature of ZnO-SAE50. Thus, modified problem in the presence of indicated physical phenomenon has effective outcomes regarding the heat transfer applications in nanolubricants.

Keywords

• Nanolubricant
• Curved device
• Suction/injection
• Thermal source
• Newtonian heating