Unit APPLIED THERMAL FLUID DYNAMICS
- Course
- Mechanical engineering
- Study-unit Code
- A005724
- Curriculum
- Energy
- Teacher
- Giorgio Baldinelli
- Teachers
-
- Giorgio Baldinelli
- Hours
- 72 ore - Giorgio Baldinelli
- CFU
- 9
- Course Regulation
- Coorte 2025
- Offered
- 2025/26
- Learning activities
- Caratterizzante
- Area
- Ingegneria meccanica
- Academic discipline
- ING-IND/10
- Type of study-unit
- Obbligatorio (Required)
- Type of learning activities
- Attività formativa monodisciplinare
- Language of instruction
- Italian
- Contents
- Complements of heat transfer and fluid flow applied to the problems of mechanical engineering. Thermal fluid dynamics and computational models for the dispersion of pollutants in the atmosphere. Thermal fluid analysis of buildings envelope: dynamic thermal characteristics, heat transfer matrix, practical examples.
- Reference texts
- G. Guglielmini, C. Pisoni, Elementi di trasmissione del calore, Ed. Veschi Lecture notes will be distributed by the teacher.
- Educational objectives
- The primary goal of the module consists of providing students with tools to solve advanced heat transfer issues. The laboratory phase is aimed to make visible the theoretical aspects treated in class lectures, both in experimental terms and as far as the use of thermal-fluid-dynamic calculations. In addition, through the direct (optional) involvement of students in exposing topics in the classroom, it is intended to make them facing the intrinsic difficulties of public speaking, indicating methods for its improvement.
- Prerequisites
- The student must know the basics of mathematical analysis, with particular reference to differential and integral calculation. Essential prerequisites are also the basics of thermodynamics.
- Teaching methods
- The course is organized with classroom on all treated subjects, as well as laboratory exercises for observing the conduction, convection and irradiation phenomena. The study of computational analysis is supported by application examples through a commercial code.
- Other information
- Attendance to the classes is optional but strongly advised.
- Learning verification modality
- The exam includes a written test and an oral exam. The written exam, which lasts an hour and a half, is the solution of 4 themes on topics related to the program, chosen within a list provided to the students. The test is intended to verify: i) the ability to understand the problems proposed during the course, ii) the ability to correctly apply the theoretical knowledge, iii) the ability to effectively communicate in writing. The oral tests, one for each module, consist of a discussion of no longer than 45 minutes each aimed to determine: i) the level of theoretical and methodological knowledge of the contents; ii) the independence of judgment in proposing the most appropriate approach for each scope. The oral examinations also aims to verify the student's ability to expose issues proposed by the Commission with property of language, to support a dialectical relationship during discussion and summarize the results of application of the theories studied. For information on support services for students with disabilities and/or DSA, visit the page http://www.unipg.it/disabilita-e-dsa
- Extended program
- Conduction Thermophysical properties; non-stationary cases ; approximation of the thin object; nonlinear problems: conductivity integral; transient in non-uniform temperature systems; fins. Radiation Radiation heat transfer; radiosity method. Characters of convection Navier-Stokes equations, energy equation in fluids, a dimensionless form of convection equations, boundary layer approximation; mechanical and thermal boundary layers, boundary layer equations, flat plate similarities solutions, the boundary layer in non-planar geometries: separation, laminar flow in pipes, losses calculation; laminar convection in internal flows, laminar natural convection. Thermal effects of turbulence Transition to turbulence; structure of turbulence, mixing length; velocity profiles, pressure drop in turbulent flows; rough pipes, turbulent thermal diffusivity; Reynolds analogy , heat exchange relations for interior flows. Condensation and boiling Film condensation, the effects of turbulence; correlations for film condensation, drops condensation; effect of non-condensable gases. Nukiyama curves; overheating; bubble growth; critical flow; forced convection boiling; correlations for boiling in forced convection. Heat exchangers Methods of MLTD and efficiency; multiple stages heat exchangers, heat exchangers typologies . Thermal Fluid Dynamics Computational Finite differences method, finite differences methods in conduction heat transfer; application of finite differences in conduction problems, the finite elements method; equations for the finite elements method in steady-state conduction; application of the finite elements method to a case of non-stationary conduction, the finite elements method in non-stationary regimes, integration of the non-stationary finite elements equations. Applications in convection heat transfer. Applications and case studies. Mathematical models for calculating the dispersion of pollutants into the atmosphere Classes of atmospheric stability, vertical temperature gradients. The phenomenon of temperature inversion. General criteria for the models choice of pollutants diffusion in the atmosphere. Gaussian models. Applications and case studies.