Note from June 29, 2020
Although we do not yet know how long the social distancing related to the Covid-19 pandemic will last, and regardless of the changes that had to be made in the evaluation of the June 2020 session in relation to what is provided for in this learning unit description, new learnig unit evaluation methods may still be adopted by the teachers; details of these methods have been - or will be - communicated to the students by the teachers, as soon as possible.
Although we do not yet know how long the social distancing related to the Covid-19 pandemic will last, and regardless of the changes that had to be made in the evaluation of the June 2020 session in relation to what is provided for in this learning unit description, new learnig unit evaluation methods may still be adopted by the teachers; details of these methods have been - or will be - communicated to the students by the teachers, as soon as possible.
5 credits
30.0 h + 30.0 h
Q1
Teacher(s)
Duponcheel Matthieu; Duponcheel Matthieu (compensates Winckelmans Grégoire); Papalexandris Miltiadis (compensates Winckelmans Grégoire); Winckelmans Grégoire;
Language
English
Prerequisites
Students are expected to master the following skills: the basics of Continuum mechanics, as they are covered within the course LMECA1901, the basics of Thermodynamics, as they are covered within the course LMECA1855, and the basics of Fluid mechanics and heat transfer, as they are covered within the course LMECA1321
Main themes
- Compressible flows.
- Isentropic flows (subsonic and supersonic) in ducts with varying cross-section, shocks.
- Hydrodynamic stability (Rayleigh, Orr-Sommerfeld) and transition.
- Turbulence (in general, in pipes/channels, in boundary layers).
- Closure models.
- Practical evaluation of friction and heat transfer coefficients.
- Singular head losses.
- Natural convection.
- Boussinesq approximation.
- Phase changes (condensation, ebullition, solidification, fusion).
- Heat exchangers.
- Thermal radiation (physical principles; surface radiation; radiation in gases).
Aims
At the end of this learning unit, the student is able to : | |
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In consideration of the reference table AA of the program "Masters degree in Mechanical Engineering", this course contributes to the development, to the acquisition and to the evaluation of the following experiences of learning:
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The contribution of this Teaching Unit to the development and command of the skills and learning outcomes of the programme(s) can be accessed at the end of this sheet, in the section entitled “Programmes/courses offering this Teaching Unit”.
Content
Compressible flows (7 hrs)
Compressible flows : Bernoulli's equation for isentropic flows; relation between incompressible flow and compressible flow at low Mach number. Isentropic flows in duct with varying cross-section, subsonic and supersonic (converging, diverging, nozzle); maximum mass flow rate. normal shock and jump relations (Hugoniot). Operating modes of a convergent-divergent nozzle. Adiabatic flow in duct with constant cross-section and with wall friction (Fanno).
2D incompressible and irrotational flows (5 hrs)
Fundamental monopole singularities: circulation singularity, mass flow rate singularity. Multipole singularities. Obtaining flows using the complex potential f(z) and examples of simple flows. Flow with and without circulation past a circular cylinder. Conformal transformation, flow past an airfoil (using the Joukowski transformation) et Kutta-Joukowski condition for the circulation, lift and Blasius theorem.
Evaporation (2 hrs)
Mass transfer in boundary layers for a highly diluted binary mixture, and correlations. Evaporation of a liquid. Heat and mass transfer correlation in forced convection, in laminar and turbulent flows.
Heat exchangers (5 hrs)
Main configurations of exchangers, incidence of the fluid circulation directions (co-flow, counter-flow and cross-flow). Convective and conductive thermal resistance. Determination of the global heat transfer coefficient. Evaluation of the exchange area. LMTD method. Efficiency of an exchanger. Dimensionless solutions epsilon-NTU (efficiency - number of transfer units).
Boiling and consensation (2 hrs)
Boiling: the different boiling modes, nucleation, Nukiyama curve; ebullition in forced convection. Condensation: film condensation, Nusselt theory.
Radiative heat transfer (5 hrs)
Basic physical laws. Surface properties (emissivity and absorbtivity, directional vs hemispherical, spectral vs total). Exchange between black surfaces. View factors. Exchange between real surfaces (special cas of gray diffuse surfaces). Electric analogy of the equivalent resistance network.
Compressible flows : Bernoulli's equation for isentropic flows; relation between incompressible flow and compressible flow at low Mach number. Isentropic flows in duct with varying cross-section, subsonic and supersonic (converging, diverging, nozzle); maximum mass flow rate. normal shock and jump relations (Hugoniot). Operating modes of a convergent-divergent nozzle. Adiabatic flow in duct with constant cross-section and with wall friction (Fanno).
2D incompressible and irrotational flows (5 hrs)
Fundamental monopole singularities: circulation singularity, mass flow rate singularity. Multipole singularities. Obtaining flows using the complex potential f(z) and examples of simple flows. Flow with and without circulation past a circular cylinder. Conformal transformation, flow past an airfoil (using the Joukowski transformation) et Kutta-Joukowski condition for the circulation, lift and Blasius theorem.
Evaporation (2 hrs)
Mass transfer in boundary layers for a highly diluted binary mixture, and correlations. Evaporation of a liquid. Heat and mass transfer correlation in forced convection, in laminar and turbulent flows.
Heat exchangers (5 hrs)
Main configurations of exchangers, incidence of the fluid circulation directions (co-flow, counter-flow and cross-flow). Convective and conductive thermal resistance. Determination of the global heat transfer coefficient. Evaluation of the exchange area. LMTD method. Efficiency of an exchanger. Dimensionless solutions epsilon-NTU (efficiency - number of transfer units).
Boiling and consensation (2 hrs)
Boiling: the different boiling modes, nucleation, Nukiyama curve; ebullition in forced convection. Condensation: film condensation, Nusselt theory.
Radiative heat transfer (5 hrs)
Basic physical laws. Surface properties (emissivity and absorbtivity, directional vs hemispherical, spectral vs total). Exchange between black surfaces. View factors. Exchange between real surfaces (special cas of gray diffuse surfaces). Electric analogy of the equivalent resistance network.
Teaching methods
Lectures : there are 13 2-hour long lectures (26 hours)
Exercices : sessions with a teaching assistant, homeworks, and at least one laboratory
The exercises are either direct appplications of the theory (with an objective to familiarize the student to pratical computation methods, and to familiarize them to typical orders of magnitude), or they will rely on the creativity of the student to use the concepts learned in the class to tackle new problems or methodologies not explicitely studied during the lectures.
Exercices : sessions with a teaching assistant, homeworks, and at least one laboratory
The exercises are either direct appplications of the theory (with an objective to familiarize the student to pratical computation methods, and to familiarize them to typical orders of magnitude), or they will rely on the creativity of the student to use the concepts learned in the class to tackle new problems or methodologies not explicitely studied during the lectures.
Evaluation methods
Evaluation of the homeworks, lab reports, and written exam.
Online resources
Bibliography
- G. Winckelmans, "Compressible flows", lecture notes
- G. Winckelmans, "Incompressible and irrotational flows", lecture notes
- M. Duponcheel, Slides on heat exchangers, Boiling and condensation, and Radiative heat transfer
- T. Bergman, A. Lavine, F. Incropera, D. Dewitt, Fundamentals of Heat and Mass Transfer, 7th Edition, Wiley, 2011 (recommended)
- Notes et/ou transparents des titulaires.
- G.K. Batchelor, "An introduction to fluid dynamics", Cambridge University Press 1967 (reprinted paperback 1994).
- F. M. White, "Viscous fluid flow" second edition, Series in Mechanical Engineering, McGraw-Hill, Inc., 1991.
- P. A. Thompson, "Compressible-fluid dynamics", advanced engineering series, Maple Press, 1984.
- H. Lamb, "Hydrodynamics", sixth edition, Cambridge University Press 1932, Dover Publications (paperback).
- L. Rosenhead, "Laminar boundary layers", Oxford University Press 1963, Dover Publications (paperback).
- P. G. Drazin and W. H. Reid, "Hydrodynamic stability", Cambridge University Press 1985.
- M. Van Dyke, "An album of fluid motion", The Parabolic Press, 1982.
- A. Bejan, "Heat transfer", Wiley, 1993.
- R.B. Bird, W.E. Stewart., E.N. Lighfoot , "Transport phenomena", Wiley int. ed., 1960.
- Schlichting, "Boundary-layer theory", Mc Graw-Hill, NY, 1986.
- L. Prandtl and O.G. Tietjens, "Fundamentals of hydro- and aero-mechanics", Dover, NY, 1957.
- J. Happel and H. Brenner, "Low Reynolds number hydrodynamics", Noordhoff int. publ., Leyden, 1973.
- D.J. Tritton, "Physical fluid dynamics", Clarendon Press, 1988.
- T. Bergman, A. Lavine, F. Incropera, D. Dewitt, Fundamentals of Heat and Mass Transfer, 7th Edition, Wiley, 2011(conseillé)
- M. N. O'zisik, Heat Transfer, a Basic Approach, McGraw-Hill, 1985
- Y. Cengel, Heat Transfer, a Practical Approach, 2nd Edition, McGraw-Hill, 2003
- N. Todreas & M. Kazimi, Nuclear Systems, Volume 1, Thermal Hydraulics Fundamentals, 2nd Edition, CRC Press, 2011
- M. F. Modest, Radiative Heat Transfer, 2nd Edition, Academic Press, 2003
Teaching materials
- G. Winckelmans, "Compressible flows", lecture notes
- G. Winckelmans, "Incompressible and irrotational flows", lecture notes
- M. Duponcheel, Slides on heat exchangers, Boiling and condensation, and Radiative heat transfer
- T. Bergman, A. Lavine, F. Incropera, D. Dewitt, Fundamentals of Heat and Mass Transfer, 7th Edition, Wiley, 2011 (recommended)
Faculty or entity
MECA
