ABSTRACT
There are many engineering applications involving turbulent flow conditions. Turbulent flow heat transfer correlations are very useful for basic heat transfer calculations such as for heat exchanger design. In turbulent flows, friction coefficients are dependent on the Reynolds number and heat transfer coefficients are related to the Reynolds and Prandtl numbers. This chapter focuses on how to derive the RANS equations. To solve these equations, the Reynolds analogy and Prandtl mixing length theory are introduced. Furthermore, the law of wall for velocity and temperature profiles is demonstrated. This classic turbulent flow theory is important to provide students with fundamental background in order to handle advanced turbulence models. The velocity profile and friction factor for turbulent flows in tubes with sand grain roughness are discussed. Computational models are also presented as state-of-the-art tools to solve the turbulent flow and heat transfer equations.
