Transport phenomena

Code

Course teacher

Associate teachers

Status of the course

Course objectives

Gaining knowledge about the principles of transfer of momentum, heat and mass transfer on the principle of a unified approach to transport phenomena. This knowledge forms the basis of chemical engineering unit operations, and they are therefore essential for a fuller understanding of process engineering.

Course enrolment requirements and entry competences required for the course

Learning outcomes expected at the level of the course (4 to 10 learning outcomes)

After passing the exam the student is expected to know:
- how to apply the laws of conservation of the fluid flow
- about molecular and convective mechanisms of transport of momentum, energy and mass
- how to recognize the major resistance at transport phenomena and how to intensifying the observed transfer
- how to gain insight into the functional dependence of the characteristics of a given system by the use of similarity theory and dimensional analysis
- the analogy of transfer of momentum, energy and mass

Course content broken down in detail by weekly class schedule (syllabus)

1st week: Introduction to physical transport phenomena. Conservation law. Molecular and convective transport mechanisms.
2nd week: Stationary and non-stationary processes. Rate of transport processes. Momentum, heat and mass fluxes. Fluid characteristics (density, relative density, specific weight...)
3rd week: Momentum transfer. Newton’s low of viscosity. Momentum flux. Application of momentum and mass balances in fluid mechanics.
4th week: Application of heat balance in fluid mechanics: Bernoulli equation and its application in process engineering.
5th week: Theories of similarity. Dimensional analysis. Flow phenomena. Laminar flow. Stationary laminar flow between two flat horizontal plates.
6th week: Stationary laminar flow through a horizontal circular tube. Hagen-Poiseuille law. Turbulent flow. Pressure drop in straight channels and in pipe systems. Moody diagram.
7th week: Flow around obstacles. Rate of sedimentation.
8th week: Flow through beds of particles. Fluidization.
9th week: Fundamental principles of heat transfer. Stationary heat conduction. Heat conduction through walls and through cylindrical walls.
10th week: Heat transfer by forced convection. Thermal boundary layer. Partial and overall heat transfer coefficients. Heat transfer during laminar and turbulent flows in pipes. Heat transfer during condensation.
11th week: Heat transfer during boiling. Heat transfer around obstacles. Heat transfer during natural convection.
12th week: Heat transport by radiation.
13th week: Fundamental principles of mass transfer. Stationary diffusion. Equimolar counterdiffusion and one-component diffusion.
14th week: Mass transfer with forced convection. Mass transfer by natural convection.
15th week: Interphase mass transfer. Analogy between heat and mass transfer.
Laboratory exercises:
Determination of fluid flow type and the critical Reynolds number; Applying the Bernoulli’s theorem: Dynamic and Surface Flow Meters - Calibration of orifice plate and rotameter; Determination of pressure drop in the pipeline; Determination of particle sedimentation rate in a stationary fluid. Determination of fluidized bed characteristics; Determination of partial and overall heat transfer coefficients; Complex heat transfer by radiation and convection; Interphase mass transfer.

Format of instruction:

Student responsibilities

Lecture attendance: 80 %. Laboratory exercises attendance: 100 %.