Transport phenomena

Part A

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.
• 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.

• Dimensionless quantities

Part B

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.
• 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.

• Dimensionless quantities

Part A

At the end of the course, students understand and will be able to apply theoretical concepts and the analysis methodology of transport phenomena, especially heat and mass transfer. They will be able to 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

Part B

At the end of the course, students understand and will be able to apply theoretical concepts and the analysis methodology of transport phenomena, especially heat and mass transfer. They will be able to 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

Part A

The courses "Chemistry" (CHIM0603-1), "Eléments de thermodynamique" CHIM0286-1, 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).

Part B

The courses "Chemistry" (CHIM0603-1), "Eléments de thermodynamique" CHIM0286-1, 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).

Part A

For chemical engineers the course is based on ex-cathedra lectures,  exercises sessions, and a lab, which is realized formally as courses CHIM0022-A-c & CHIM0022-B-a. For chemists the lectures do not include the section on dimensionless qunatities and the lab is not required, which is formally realized as course CHIM0022-A-c. The detailed schedule will be presented during the first lecture.
The lectures are dedicated to the detailed description of the fundamental concepts necessary for the analysis and mathematical representation of transport phenomena.
During exercise sessions students learn how to solve problems related to heat and mass transport phenomena.
In the lab session some standard experimental methods are introduced.

Part B

For chemical engineers the course is based on ex-cathedra lectures,  exercises sessions, and a lab, which is realized formally as courses CHIM0022-A-c & CHIM0022-B-a. For chemists the lectures do not include the section on dimensionless qunatities and the lab is not required, which is formally realized as course CHIM0022-A-c. The detailed schedule will be presented during the first lecture.
The lectures are dedicated to the detailed description of the fundamental concepts necessary for the analysis and mathematical representation of transport phenomena.
During exercise sessions students learn how to solve problems related to heat and mass transport phenomena.
In the lab session some standard experimental methods are introduced.

Part A

Face-to-face

Part B

Face-to-face

Part A

The course material is available on the eCampus website.

Part B

The course material is available on the eCampus website.

Part A

A written exam is organized during the first session in June.
The second session exam is organized in the same way as in June.
The written exam consists of exercise problems to be solved, which are similar to those presented during exercise sessions.
It is a closed-book exam. Students receive a formulary with all relevant equations.
Both exams may be oral, if the number of students is 5 or less.

Part B

A written exam is organized during the first session in June.
The second session exam is organized in the same way as in June.
The written exam consists of exercise problems to be solved, which are similar to those presented during exercise sessions.
It is a closed-book exam. Students receive a formulary with all relevant equations.
Both exams may be oral, if the number of students is 5 or less.

Part A

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Part B

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Part A

The course will be presented in English.
The course is organized during the second quadrimester.

Part B

The course will be presented in English.
The course is organized during the second quadrimester.

Part A

Andreas Pfennig PEPs - Products, Environment, and Processes Department of Chemical Engineering University of Liège Quartier Agora, Allée du six Aout 11, Bâtiment B6c, office 1/66 phone: +32 4 366-3521 e-mail: andreas.pfennig@uliege.be www.chemeng.uliege.be/Pfennig  

Part B

Andreas Pfennig PEPs - Products, Environment, and Processes Department of Chemical Engineering University of Liège Quartier Agora, Allée du six Aout 11, Bâtiment B6c, office 1/66 phone: +32 4 366-3521 e-mail: andreas.pfennig@uliege.be www.chemeng.uliege.be/Pfennig