OVERVIEW

The outcome of the Heat Transfer course is to provide, through theoretical lessons and numerical exercises, an advanced knowledge of the main fundamentals of heat transfer involved in applications and processes of interest for the mechanical engineer.

AIMS AND CONTENT

LEARNING OUTCOMES

The goal of the teaching unit is to provide the student the basis for the thermal analysis in components and processes of particular interest for mechanical engineering.

The student will demonstrate to possess a deep knowledge of the different heat transfer mechanisms and to be able to apply the fundamental laws to engineering problems.

AIMS AND LEARNING OUTCOMES

On successful completion of this module, students should demonstrate:

• Knowledge and understanding of the heat transfer equations, including their application to complex problems, also in case of on combined heat transfer mechanisms;
• Ability to propose solutions to limit/enhance heat transfer in complex systems;
• Ability to select the most suitable numerical or analytical method for the solution of the heat transfer equations (dimensionless formulation, numerical methods).

PREREQUISITES

Bachelor level knowledge in heat transfer and thermodynamics is mandatory.

TEACHING METHODS

Lectures

Students who have valid certification of physical or learning disabilities on file with the University and who wish to discuss possible accommodations or other circumstances regarding lectures, coursework and exams, should speak both with the instructor and with Professor Federico Scarpa (federico.scarpa@unige.it), the Polytechnic School's disability liaison.

SYLLABUS/CONTENT

HEAT CONDUCTION: General heat conduction equation; boundary and initial conditions; the thermal resistance concept; critical radius of insulation; heat transfer from finned surfaces; lumped system analysis; transient heat conduction in semi-infinite solids; finite difference formulation of differential equations in heat conduction.

HEAT CONVECTION: Fundamentals and preliminary analysis; conservation of mass equation; conservation of momentum equations: newtonian fluids and Navier-Stokes equations; conservation of energy equation; dimensionless forced convection equations and similarity; analogies between momentum and heat transfer; turbulence; Blasius solutions of convection equations for a flat plate; forced convection in tubes; natural convection: Boussinesq assumption; dimensionless natural convection equations.

THERMAL RADIATION: Fundamentals; blackbody and gray surfaces radiation; radiation heat transfer: black surfaces and diffuse, gray surfaces.

TWO-PHASE HEAT TRANSFER: Fundamentals of pool and flow boiling; Nusselt equation for condensation.

This unit contributes to the achievement of the following Sustainable Development Goals of the UN 2030 Agenda: 4. Quality Education, 7. Clean and Affordable Energy.

RECOMMENDED READING/BIBLIOGRAPHY

• Y. Cengel. Heat and Mass Transfer, Ed. McGrawHill, 2015.

• Incropera, DeWitt, Bergman, Lavine: Fundamentals of Heat and Mass Transfer, John Wiley and Sons, 2011
• A.Bejan, Heat Transfer, John Wiley and Sons, Inc, 1993

TEACHERS AND EXAM BOARD

LESSONS

LESSONS START

https://corsi.unige.it/en/corsi/11960/studenti-orario

Class schedule

The timetable for this course is available here: Portale EasyAcademy

EXAMS

EXAM DESCRIPTION

Oral examination

ASSESSMENT METHODS

The oral examination in based on a specific topic among those presented during the course, with in addition a couple of short questions on other one/two subjects. The aim of the examination is to assess the student knowledge and the skill in reasoning and subject presentation.

Students with a certified learning disability (DSA), a disability, or other special educational needs are invited to contact the instructor at the beginning of the course to discuss teaching and examination arrangements that, while respecting the learning objectives of the course, take individual learning needs into account and provide appropriate accommodations.

Please also note that requests for exam accommodations or exemptions must be submitted using the form available at this link  https://modulionline.unige.it/richiesta-adattamenti#no-back , to the course professor, the DIME contact person (federico.scarpa@unige.it), and the relevant office (inclusione.studenti@info.unige.it) at least seven working days before the examination, in accordance with the guidelines available at this link https://unige.it/disabilita-dsa/richiesta-servizi