APPLIED PHYSICS FOR INDUSTRIAL DESIGN
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- Versione italiana
- Academic year
- 2020/2021
- Teacher
- MICHELE BOTTARELLI
- Credits
- 6
- Didactic period
- Primo Semestre
- SSD
- ING-IND/10
Training objectives
- The course is focused on fundamentals of applied physics, as regarding thermodynamics, heat transfer and acoustics for the product design.
The main knowledges are:
- Thermodynamics
- Thermodynamics cycles, with regard of renewable energies exploitation
- Heat transfer
- Acoustics characterization
- Noise control
The main skills are expertise in:
- knowledge of physics fundamentals
- expertise in modelling real problems according the skills acquired
- skill in designing by a quantitative approach Prerequisites
- No prerequisites are required
Course programme
- Lectures are organized in three parts: acoustics, thermodynamics, heat transfer.
Part 1: THERMODYNAMICS (18 hours)
Concepts and definitions used in thermodynamics. Work and heat. The first law of thermodynamics, internal energy, enthalpy, specific heat. Ideal and real gases. Thermodynamic diagrams. First-law analysis for turbines, compressors, pumps, valves. The second law of thermodynamics. Reversible process. Carnot cycle and its efficiency. Ideal versus real thermal machines. Outlines of thermodynamics cycles (Brayton, Stirling, Rankine, refrigeration cycle, heat pumps). Renewable energy exploitation by heat pumps.
Air water vapour mixture. Humidity control in air flow.
Part 2: HEAT TRANSFER (18 hours)
Conduction in solids. Heat conductivity. Natural and forced convection heat transfer. Radiation. Emissivity, Reflectivity. Black body, gray body. Solar radiance. Heat transfer control by phenomenon: low thermal conductivity, phase change, natural/forced ventilation, reflectivity.
Part 3: ACOUSTICS (12 hours)
Basic acoustical concepts and variables. Sound energy and intensity. Sound pressure and sound levels. Frequency analysis in half octave shift, critical frequency band. Human ear and its response to sound pressure level. Isophonic filters. A-weighted equivalent continuous noise level. Sound sources and outdoor sound propagation, geometrical spreading, directivity index, excess attenuation factor, air absorption, shielding by barriers. Fresnel number and Maekawa equation. The traffic noise, impact and model formulation. Control sound in enclosed spaces. Acoustic insulation and adsorption. Sabine and Eyring formulations. Reverberation time method for the measurement of the constant room. Open, semi and full reverberant field. Low/high frequency behaviour. Acoustical properties of porous material. Panel sound absorber. Mass low and acoustic insulation. Didactic methods
- Lectures assisted by Powerpoint slides projection, practical exercises and monitoring systems for testing are the main methods to present topics and apply on them.
Experimental tests will be proposed to approach some physic concepts.
Blackboard is still considered functional to support the understanding of all topics, even if they are available on slides.
Streaming and videos will be available for remote frequency.
Tools implemented in experimental test will be available also for their usage in thesys.
The introduction and preliminary use of numerical models is also proposed to approach complex problems. Learning assessment procedures
- The learning verification is carried out with regard of the evaluation of:
1. an elaborate composed by the student on the basis of experimental or numerical analyses concerning Thermodynamics and Thermokinetics;
2. an elaborate composed by the student on the basis of experimental or numerical analyses concerning Acoustics.
To each elaborate is assigned a rating out of thirty. The overall evaluation is then defined by the weighted average of the total number of hours of the parts (75% for THERMODYNAMICS and THERMOCINETICS; 25% for ACOUSTICS). If positive, the candidate can choose whether to integrate this result with an oral discussion on the elaborates. The opportunity is limited to only the first examination following the end of the course and can result in integration up to -/+3/30. In absence of an integration request, the vote is directly attributed as the overall evaluation of the elaborates.
In all other cases, the vote is follows an oral examination on the full programme, as practical application of the theory.
(Italian or English on request) Reference texts
- Part 1-2
Yunus A. Cengel, Michael A. Boles, Thermodynamics: An Engineering Approach Mc Graw Hill New York
Yunus A. Cengel, John Cimbala, Fluid Mechanics Fundamentals and Applications Mc Graw Hill New York
Draft notes available on the course website
Part 3
Leland K. Irvine, Roy L. Richards, Acoustics and Noise Control Handbook for Architects and Builders, Krieger Pub Co
David A. Bies, Colin H. Hansen, Engineering Noise Control: Theory and Practice, CRC Press
D. Halliday, R. Resnick, Fundamentals of Physics,
Draft notes available on the course website
