Learning objectives
The course aims at providing the tools necessary to understand and carry out analysis in engineering applications of heat transfer.
Knowledge and understanding:
At the end of this course the student should know the fundamentals of heat transfer.
Applying knowledge and understanding:
The student should be able to analyze engineering problems related to the course.
Making judgments:
By the end of the course, the student should be able to evaluate, with critical mind, the problem of heat transfer and fluid flow.
Communication skills:
The student should be able to clearly present his knowledge in heat trasnfer.
Prerequisites
It is useful to have familiarity with the basic features of Applied Thermodynamics.
Course unit content
Heat transfer and thermofluidics.
Full programme
Heat conduction, Fourier law and Fourier equation. Thermal conductivity, insulating materials. Temperature profile, heat flux. Internal power generation. Cartesian and cylindrical coordinates.
Heat convection, heat transfer coefficient and Newton law. Biot and Nusselt numbers.
Radiative heat transfer; Absorption and emission. Black and grey bodies. Stefan Boltzmann law, Plank law, Wien law, Lambert law, Kirchhoff law. Applications. Solar radiation. Combined radiative and convective heat transfer.
Non isothermal fluid flow. Viscosity and reology. Boundary layers, external and internal flows. Entrance region, fully developed flows. Continuity, Navier-Stokes and energy equations. Coutte flow. Poiseuille flow. Falling film on inclined surfaces. Laminar flow in circular and non-circular ducts. Microfluidics, Knudsen number. Slip flow in micro channels.
Laminar flow of non-Newtonian fluids in circular ducts. Forced, mixed and natural convection. Reynolds, Prandtl, Brinkman, Grashof numbers. Turbulent flow. Heat exchangers.
Bibliography
M. Spiga, Fisica Tecnica 2, Esculapio Editore, Bologna.
Teaching methods
Slides will be used to convey the most important messages of the theory lectures.
Assessment methods and criteria
The examination is based on a written exam.
Other information
E’ consigliata la frequenza del corso.
