Perpindahan panas pada Fluida Non-Newton

Abstract

Non-Newtonian fluids exhibit behaviour deviating from Newton’s law. In Sisko fluid flow, which is a non-Newtonian fluid, within pipes, the relationship between shear stress magnitude and shear strain becomes linear as the shear stress limit is ex- ceeded. Hence, it is essential to understand the velocity profile and heat transfer occurring in Sisko fluid flow inside pipes. This thesis examines the velocity model of fluid flow and heat transfer of non-Newtonian fluids flowing in pipes to under- stand their velocity profile and heat transfer. Assumptions and problem constraints are established, utilizing the laws of mass conservation, linear momentum equation, pressure equation for moving fluids, and heat convection equation. The obtained mo- del constitutes a system of ordinary differential equations (ODEs). This model is numerically solved using finite difference method with central scheme and visualized with Matlab 7.10. From the visualization of the relationship between cylinder radius and fluid flow velocity depicted in graphical form, it is observed that the velocity of Newtonian fluid is greater than Sisko fluid when n=1, and conversely for n = 0. The temperature of Sisko fluid is always higher than Newtonian fluid. Hence, it can be seen that the velocity and temperature profiles of Sisko fluid are influenced by the applied pressure and material parameter b, besides heat distribution is also affected by Brinkman number.