Transport Phenomena

Recommended Prerequisites

Calculus I, II,  Physics I, II, Chemistry I, II, Topics of Thermodynamics.

Teaching Methods

There are theoretical (T), theoretical-practical (TP) lectures. In the first, theoretical concepts are presented followed by their applications through the presentation of case studies that are discussed and solved in class. The main way of teaching is in the form of handouts, using also small demonstration movies. Students are encouraged to solve exercises in TP classes, where discussions with their colleagues are allowed. Some problems are also proposed for autonomous solving which are then discussed in following TP classes.

Learning Outcomes

Besides the physical understanding, students should: 1. identify and mathematically describe the mechanisms of heat and mass transfer; 2. understand the concept of thermal resistance, identifying the existence of thermal resistance in series and quantifying the total resistance 3. establish energy and mass balances in steady state and in transient conditions; 4. know and use the methodology for calculating the heat and mass transfer coefficients; 5. design equipment where heat transfer (heat exchangers) and mass transfer occur (absorption columns). The students should develop the ability to understand and relate knowledge of the contents taught, to acquire knowledge independently and to formulate and solve problems. They should also demonstrate critical and synthesis capacity, and  a well structured and integrated way of thinking, by applying their theoretical and practical knowledge and understanding in a manner that indicates a professional approach to their work.

Work Placement(s)

No

Syllabus

Heat transfer: mechanisms (conduction, forced convection, radiation), thermal resistances in series; global heat transfer coefficient, thermal insulation, empirical correlations for heat transfer coefficients. Internal and external flow (over spheres, cylinders and plates). Unsteady-state heat transfer: heating/cooling of solids in fluids.

Heat exchangers: design and operating conditions, correction for logarithmic mean temperature difference; efficiency. Mass transfer: mechanisms (diffusion, convection), empirical correlations for the mass transfer coefficients. Analogies between heat and mass transfer. Internal and external flow (over spheres, cylinders and plates). Unsteady-state mass transfer. Mass transfer through contacting phases, mass resistances in series, global mass transfer coefficient. Design of plate absorption columns: design and operating conditions.

Head Lecturer(s)

Paulo Jorge Tavares Ferreira

Assessment Methods

Assessment
There are two types of assessment: during the semester or final exam. Evaluation during the semester: 2 tests (average weight of 50% each). A student does not need to do the final exam if the overall grade is higher than 9.5 (in 20) and a minimum of 7 (in 20) in each test is attained. The weight of the final exam is 100%.: 100.0%

Bibliography

- Bergman, T.L.; Lavine, A.S.; Incropera, F.P.; de Witt, D.P. Fundamentals of Heat and Mass Transfer. 7th ed, J. Wiley & Sons, N.Y., 2011.

- Çengel, Y.; A.Ghajar, A. Heat and Mass Transfer: Fundamentals and Applications. McGraw-Hill Inc., N.Y. , 2010.

- Geankoplis, C.J. Transport Processes and Separation Process (Includes Unit Operations), 4th ed., Prentice-Hall, 2003

- Welty, J.R; Wicks, C.E.; Wilson, R.E.; Rorrer G.L. Fundamentals of momentum, heat and mass transfer. 5th ed. John Wiley &Sons, Inc, N.Y., 2010.

- Holman, J.P. Heat Transfer. 9th ed. , McGraw-Hill Inc., N.Y. , 2002.

- McCabe, W.; Smith, J.; Harriott, P. Unit Operations of Chemical Engineering. 7th ed. McGraw-Hill Book Co., NewYork, 2005.

- Bird, R.B.; Stewart, W.E.; Lightfoot, E. N. Transport Phenomena. 2nd ed.. J Wiley & Sons, 2007.

- Datta, A.K. Biological and bioenvironmental heat and mass transfer, Marcel Dekker Inc., N.Y. 2002.