70/0072-M - FLUID MECHANICS
Academic Year 2018/2019
Free text for the University
SIMONE FERRARI (Tit.)
- Teaching style
- Lingua Insegnamento
|[70/77] CHEMICAL ENGINEERING||[77/00 - Ord. 2016] PERCORSO COMUNE||9||90|
|[70/77] CHEMICAL ENGINEERING||[77/00 - Ord. 2017] PERCORSO COMUNE||9||90|
The Course supplies the necessary competencies for the understanding of the fundamental principles of Fluid Mechanics and the ability to understand the phenomenology of laminar and turbulent flows.
The main aims of the course are:
• to stimulate the deepening of the knowledge about Fluid Mechanics peculiar of the industrial applications of Chemical Engineering;
• to induce the knowledge and the proper interpretation of the main phenomena of Fluid Mechanics involved in Chemical Engineering;
• to supply the students with a methodology of interpretation and computation concerning the balance of mass, momentum, forces and energy of fluids in the field of Chemical Engineering.
The expected learning outcomes are:
• the capability to apply the acquired skills in the design and implementation of modelling and analysis of processes, in the field of hydrostatics and pipe flows;
• the ability to identify and use data to formulate responses to well-defined concrete and abstract problems;
• the ability to communicate about the above described phenomena with the peers, supervisors and clients of studies and simulations, and with people who develop and make use of simulation models;
• the learning skills to undertake further studies with some autonomy on particular phenomenological aspects;
• the capability to work in a group.
The student, before facing the contents of the Course of Fluid Mechanics, has to be sure to have a good knowledge of Mathematics and Physics (Mechanics is essential). In particular, in order to properly understand the topics of the Course, it is essential to know the vectorial calculus (sum and difference of vectors, vector decomposition on assigned directions, calculus of the modulus and direction of a vector when its components are known, scalar and vectorial product), trigonometry, the concept of function (also with more variables), limit, derivative and integral, the physical quantities (length, time, velocity, acceleration, mass, force, energy, power) and their unit; it is important to know the basics of Mechanics; it is useful to know the concepts of static moment and moment of inertia.
Mathematics 1; Mathematics 2; Physics 1.
The Course is divided into two main sections: in the first section (Kinematics and Dynamics) the equations are obtained and in the second section the equations are applied to some cases of interest for a chemical engineer.
• Kinematics and Dynamics of compressible fluids [18h frontal lect. + 3 Sem. + 8h Exerc. + 3h Lab.]
• Hydrostatics [6h frontal lect. + 8h Exerc.]
• Potential flows [6h frontal lect. + 2h Sem. + 2h Exerc.]
• Laminar Boundary Layer, Prandtl equation and Boundary Layer separation [4h frontal lect.]
• Turbulence, Reynolds Equations, Turbulence closures and Turbulent Boundary Layer [8h frontal lect. + 3h Sem. + 1h Exerc.]
• Flow equations, Pipe flows, major and minor head losses [8h frontal lect. + 2h sem. + 8h Es.]
The lectures are arranged in order to stimulate the active participation of the students to the achievement of the conclusions, also through the recall of what have been already studied in past courses or in the present course. Moreover, exercises in the lecture room and in the laboratory are carried out during the course. In particular, during the exercises in the lecture room the students are divided in small groups; exercises concern the theoretical and numerical resolution of practical problems of Fluid Mechanics concerning Chemical Engineering. Laboratory exercises are conducted in a similar way. The reports are evaluated and at the end of the course and they contribute the conclusive mark for two points over thirty at most.
In particular, the hours of the course are divided in this way:
• frontal lectures: 50 h;
• seminars: 10 h;
• numerical exercises in the lecture room 27 h;
• experimental exercises in the laboratory 3 h.
Verification of learning
The conclusive test is an oral test with three queries, one or two about design/check, one or two about theory. The aim of the test is the evaluation of the acquired knowledge, particularly regarding the understanding of the engineering applications of the knowledge, and of the ability to apply it to an “open” practical case, that is a case where non every variable is fixed and the decisional choices are taken by the student (who has to demonstrate the ability to discuss and motivate them). The reports of the exercitations carried out during the classes are evaluated as well; they contribute the conclusive mark for two points over thirty at most.
To obtain a mark between 18/30 and 21/30, the student must demonstrate a sufficient knowledge of the basic subjects and be able at least to properly sketch out and solve a simple problem among the ones explained during the class.
To obtain a mark between 22/30 and 24/30, the student must demonstrate a fair knowledge of all the subjects discussed during the test and be able to solve a similar problem to the ones explained during the class.
To obtain a mark between 25/30 and 27/30, the student must demonstrate a good knowledge of all the subjects discussed during the test and of their practical applications, in addition to be able to solve a problem not explained during the class.
To obtain a mark between 28/30 and 30/30 with honors, the student must demonstrate an excellent knowledge of all the subjects discussed during the test, with the ability to autonomously identify their practical applications, and be able to autonomously and brilliantly solve a problem not explained during the class.
• G.Querzoli, Dispense di Idraulica, downloadable from: http://pcque.unica.it/dispense/IdraulicaVO.PDF
• Y.A.Cengel and J.M.Cimbala, Meccanica dei Fluidi, McGraw-Hill;
Textbooks for a more detailed study:
• B.R.Munson, T.H. Okiishi, e A.P. Rothmayer, Meccanica dei Fluidi, Città Studi Edizioni;
• J.O.Wilkes, Fluid Mechanics for Chemical Engineers, Prentice Hall;
• N.de Nevers, Fluid Mechanics for Chemical Engineers, McGraw-Hill.
Reference textbooks for exercises:
• Solved exercises downloadable from: http://people.unica.it/simoneferrari/didattica/
Textbooks for a more detailed study of exercises:
• G.Alfonsi and E.Orsi, Problemi di Idraulica e Meccanica dei Fluidi, Casa Editrice Ambrosiana;
• S.Longo and M.G.Tanda, Esercizi di Idraulica e di Meccanica dei Fluidi, Springer.
The slides projected during the lessons, solved exercises, link to useful websites, files employed during the exercitations and other reference materials are available on the professor’s website at http://people.unica.it/simoneferrari/didattica/