Numerical Solution Of Nanofluids Flow And Heat Transfer Over A Moving Surface With Thermal Radiation

Azli, Muhammad Asyraf (2017) Numerical Solution Of Nanofluids Flow And Heat Transfer Over A Moving Surface With Thermal Radiation. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Nanofluid is an advanced kind of fluid containing small quantities of nanoparticles that are uniformly and stably suspended in a base liquid. It has a higher thermal conductivity and enhanced heat transfer coefficient than its base fluid. In this study, the boundary layer of nanofluids problems has been carried out through the numerical solutions over a moving surface in the appearance of the thermal radiation. This mathematical model describes the flow of nanofluid that incorporates the effects of thermal radiation, Brownian motion and thermophoresis. The governing nonlinear partial differential equations are transformed into a system of nonlinear ordinary differential equations using similarity transformation which is then solved numerically using a finite difference scheme known as the Keller-box method. The numerical results for reduced Nusselt and reduced Sherwood numbers obtained shows that when the thermophoresis increase, the Sherwood number and the Nusselt number will decrease. On the other hand, the decreasing of the Nusselt number tends to increase the Sherwood number as the Brownian motion effects are increased. The effect of thermal radiation proves that the thickness of the thermal boundary layer increases due to the increases of the values of the radiation parameter. Thus, thermal radiation enhances thermal diffusion. The results show that the Brownian motion and thermophoresis influence the flow characteristics of nanofluids by either warming the boundary layer or aggravating the collisions between the nanoparticles and molecules of the base fluid.

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