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Risorsa bibliografica facoltativa 

Anno Accademico

2017/2018

Scuola

Scuola di Ingegneria Industriale e dell'Informazione 
Insegnamento

083903  HEAT TRANSFER AND THERMAL ANALYSIS

Docente 
Guilizzoni Manfredo Gherardo

Cfu 
6.00

Tipo insegnamento

Monodisciplinare

Corso di Studi 
Codice Piano di Studio preventivamente approvato 
Da (compreso) 
A (escluso) 
Insegnamento 
Ing Ind  Inf (Mag.)(ord. 270)  BV (469) AERONAUTICAL ENGINEERING  INGEGNERIA AERONAUTICA  *  A  ZZZZ  083903  HEAT TRANSFER AND THERMAL ANALYSIS  Ing Ind  Inf (Mag.)(ord. 270)  BV (470) SPACE ENGINEERING  INGEGNERIA SPAZIALE  *  A  ZZZZ  083903  HEAT TRANSFER AND THERMAL ANALYSIS  Ing Ind  Inf (Mag.)(ord. 270)  BV (479) MANAGEMENT ENGINEERING  INGEGNERIA GESTIONALE  *  A  ZZZZ  083903  HEAT TRANSFER AND THERMAL ANALYSIS  Ing Ind  Inf (Mag.)(ord. 270)  BV (483) MECHANICAL ENGINEERING  INGEGNERIA MECCANICA  *  A  ZZZZ  083903  HEAT TRANSFER AND THERMAL ANALYSIS 
Programma dettagliato e risultati di apprendimento attesi 
Focus
The course is focused on an advanced treatment of heat transfer and it is aimed at providing knowledge and knowhow for the solution of heat transfer and thermal control problems, particularly for space applications.
Detailed description of the topics
1. Heat conduction. The Fourier hypothesis and the thermal conductivity. The heat diffusion equation; initial, boundary and interface conditions. Steadystate conduction: onedimensional solutions; thermal resistances and equivalent circuits. Transient conduction: lumpedcapacity solutions; analytical solutions in a semiinfinite medium with constant or periodic temperature boundary condition; thermal waves.
2. Convective heat transfer. The governing equations, dimensionless version of the thermofluid dynamics equations and dimensionless groups of interest for convection. Free and forced convection in external flows: laminar and turbulent boundary layers, micro and macro scales, velocity profiles; some relevant heat transfer correlations for flows over flat plate, cylinders, spheres and bluff bodies. Forced convection inside ducts: the bulk temperature, the fully developed region and the Graetz problem; some relevant correlations for the friction factor and the heat transfer coefficient; the logarithmic mean temperature difference. Boiling and condensation: evaporation; introduction to capillary and interface phenomena; metastable states; pool boiling, the boiling curve, critical and minimum heat fluxes, factors affecting the boiling curve; introduction to twophase flow, forcedconvection boiling inside tubes; film condensation on vertical flat plates and inside/outside tubes, dropwise condensation.
3. Radiative transfer. Overview about radiation and radiationmatter interaction. Thermal radiation, radiation intensity, directional, spectral and total quantities, irradiation and radiosity. Blackbody radiation: Planck distribution, StefanBoltzmann law, Wien displacement law, band emission. Emission, absorption, reflection, transmission for real, diffuse and gray emitters; selective surfaces; Kirchhoff law. Radiation exchange between gray surfaces, view factors and their relationships, radiation exchange between gray surfaces in an enclosure. Radiation in gases: emission, absorption, scattering. Solar and environmental radiation.
4. Thermal analysis. Introduction to thermal control. Operative and survival limits. Internal and external thermal sources. Heat sinks, cooling/insulating devices for electronic/space equipment: fillers, thermal bridges, cold plates, heat pipes, Peltier cells, coatings and clothing, primary and secondary surface mirrors, space radiators.
5. Thermal modeling. Design of heat exchangers and extended surfaces. Lumpedcapacity approach: arithmetic and diffusive nodes, mesh types, thermal resistances. Introduction to numerical methods and codes to solve thermal equivalent circuits for space applications; steady and transient multidimensional conduction by means of finite difference approximation, basic forms, explicit and implicit schemes, direct and iterative solving methods; FEM and FVM numerical codes; raytracing and Monte Carlo methods for radiation.

Note Sulla Modalità di valutazione 
Course organization and exams
The course is structured in lessons, exercises and laboratories. Exercises are devoted to the solution of problems related to heat transfer analyses and thermal design, focused both on general applications and on space and propulsion topics. Laboratories are devoted to the use of suitable software for the solution of thermofluid dynamics problems.
Exams are scheduled only after the course end (no intermediate test is offered). They consist of a written test including theoretical questions and numerical exercises on the course topics.

John H. Lienhard IV, John H. Lienhard V, A Heat Transfer Textbook, 4th edition, ISBN: 9780486479316 Note:The textbook can be dowloaded from the given Web page
Theodore L. Bergman, Adrienne S. Lavine, Frank P. Incropera, David P. DeWitt, Fundamentals of Heat and Mass Transfer, 7th Edition, Editore: John Wiley & Sons, Anno edizione: 2011, ISBN: 9780470917855

Nessun software richiesto 
Tipo Forma Didattica

Ore didattiche 
lezione

38.0

esercitazione

22.0

laboratorio informatico

8.0

laboratorio sperimentale

0.0

progetto

0.0

laboratorio di progetto

6.0

Informazioni in lingua inglese a supporto dell'internazionalizzazione 
Insegnamento erogato in lingua
Inglese

Disponibilità di libri di testo/bibliografia in lingua inglese

Possibilità di sostenere l'esame in lingua inglese

Disponibilità di supporto didattico in lingua inglese

