CHIM0022-4 : Transport phenomena

Study Programmes 2015-2016

CHIM0022-4

Transport phenomena

Duration :

30h Th, 15h Pr

Number of credits :

Bachelor in engineering		4
Bachelor in engineering		4
Master in chemical and materials engineering (120 ECTS)		4

Lecturer :

Andreas Pfennig

Language(s) of instruction :

English language

Organisation and examination :

Teaching in the first semester, review in January

Units courses prerequisite and corequisite :

Prerequisite or corequisite units are presented within each program

Course contents :

This course presents an analysis of the transport phenomena at the basis of chemical engineering with the focus on heat and mass transfer.

Definitions of extensive and intensive properties. Concepts of mass, momentum, and energy balance equations. Dimensionless numbers, Pi-theorem.
Molecular basis for heat and mass transfer. Similarity between both.
Energy-balance equation. Conductive and radiative contributions. Fourier's law: thermal conductivity. Stefan-Boltzmann's law: Stefan-Boltzmann constant, emissivity. Conductive stationary heat transfer: heat transfer coefficient. Conductive transient heat transfer: Fourier's number.
Mass balances. Relative displacement flux, diffusional flux. Fick's and Maxwell-Stefan law, different molecular diffusion coefficients. Transient mass transfer. Quasi-stationary mass transfer: mass-transfer coefficient.
Convective heat and mass transfer. Stagnant-film model, surface-renewal theory, penetration theory, two-film theory. Dimensionless numbers. Correlations of mass-transfer coefficients.
Instabilities at interfaces induced by mass transfer.

Learning outcomes of the course :

At the end of the course, students will be able to apply theoretical concepts and the analysis methodology of transport phenomena, especially heat and mass transfer. They will use these concepts to describe mathematically simple experimental systems. They will be able to use the formalism of mass and heat transfer coefficient.
Students will be able to link investigated phenomena to their mathematical representation and justify main simplifications adopted to develop the model
Exercise and laboratory sessions in small groups will help the students to develop more transverse skills as team-working, numerical problem resolution, critical analysis of experimental data, assessment of the validity of a theoretical approach and report writing.

Prerequisite knowledge and skills :

The courses "Eléments de thermodynamique" CHIM0286-1, "Chemistry" (CHIM0603-1), and "Elements of fluid mechanics" (MECA0011-2) (or courses with similar contents) should have been attended during previous years (or they should be attended the same year).

Planned learning activities and teaching methods :

The course is based on ex-cathedra lectures (30 h) and practical courses (15 h) including exercises and laboratory sessions.
The ex-cathedra lectures are dedicated to the detailed description of the fundamental concepts necessary for the analysis and mathematical representation of transport phenomena.
Practical courses include exercise sessions during which students learn how to solve problems related to heat and mass transport phenomena.
During laboratory sessions, students work in small teams. They have the opportunity to get familiar with experimental measurement techniques of fluid transfer properties.
Participation to laboratory sessions is mandatory. The sessions have to be prepared by carefully reading the corresponding laboratory notes, which will be checked by an entrance test. If the entrance test is not passed, access to the laboratory sessions may be denied. A report should be realized (maximum 2 weeks) after the lab.

Mode of delivery (face-to-face ; distance-learning) :

face-to-face

Recommended or required readings :

The course material is available on the eCampus website. Additional information (exercises and laboratory notes) will also be made available on the eCampus website during the course.

Assessment methods and criteria :

A written exam is organized during the first session in January.
Participation to lab and the report are mandatory to pass the exam.
The exam consists of exercise problems to be solved, which are similar to those presented during exercise sessions. The remaining about 40% consist of questions referring to basic understanding of the lecture content.
It is a closed-book exam. Students receive a formulary with all relevant equations for solving the problems together with the exam problems.
Moreover, a report of the laboratory sessions must be provided by the students within 2 weeks after these sessions. This report must present the obtained experimental results, their critical analysis as well as answers to the questions presented in the laboratory notes.
The global mark is a weighted average of the marks obtained at the written exam (80 %) and the laboratory (including report and entrance test) (20 %).
The second session exam is organized in the same way as in January. The mark obtained for the laboratory report is maintained.

Work placement(s) :

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Organizational remarks :

The course will be presented in English.
The course is organized during the first quadrimester.
The calendar of laboratory sessions will be communicated in October.

Contacts :

Andreas Pfennig PEPs (Products, Environment and Processes) Departement of Chemical Engineering University of Liège Quartier Agora, Allée du six Aout 11, Bâtiment B6c, office 1/66 e-mail: andreas.pfennig@ulg.ac.be phone: +32 4 366-3521 Saicha Gerbinet PEPs (Products, Environment and Processes) Departement of Chemical Engineering University of Liège Bât. B6, Quartier Agora, Allée du six Aout 13, 4000 Liège, Belgique phone: +32 4 366-3547 e-mail: saicha.gerbinet@ulg.ac.be
The list of assistants and their contact details is available on www.chimapp.ulg.ac.be