Reference no: EM131144928

• What is the difference between a local convection heat transfer coefficient and an average coefficient? What are their units?

• What are the forms of Newton's law of cooling for a heat flux and a heat rate?

• What are the velocity and thermal boundary layers? Under what conditions do they develop?

• What quantities change with location in a velocity boundary layer? A thermal boundary layer?

• Recognizing that convection heat transfer is strongly influenced by conditions associated with fluid flow over a surface, how Is it that we may determine the convection heal flux by applying Fourier's law to the fluid at the surface?

• Do we expect heat transfer to change with transition from a laminar to a turbulent boundary layer? If so, how?

• What laws of nature are embodied by the convection transfer equations?

• What physical processes are represented by the terms of the x-momentum equation? By the energy equation?

• What special approximations may be made for conditions within thin velocity- and thermal boundary layers?

• What is the film temperature and how is it used?

• How is the Reynolds number defined? What is its physical interpretation? What role is played by the critical Reynolds number?

• What is the definition of the Prandtl number? How does its value affect relative growth of the velocity and thermal boundary layers for laminar flow over a surface? What are representative room temperature values of the Prandtl number for a liquid metal, a gas, water, and an oil?

• What is the coefficient of friction? The Nusselt number? For flow over a prescribed geometry, what are the independent parameters that determine local and average values of these quantities?

• Under what conditions may velocity and thermal boundary layers be termed analogous? What is the physical basis of analogous behavior?

• What important boundary layer parameters are linked by the Reynolds analogy?

• What physical features distinguish a turbulent flow from a laminar flow?