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ENGINEERING TRIPOS PART IIA - 2012/2013

   Module 3A6 - Heat and Mass Transfer

Leader:

Prof. S. Hochgreb

Timing:	Lent Term
Prerequisites:	None
Structure:	16L

Lectures:

1. Conduction,radiation and applications of multimode heat transfer - 7 lectures (Dr. N. Atkins)

2.Convection and mass transfer - 9 lectures (Prof. S. Hochgreb)

AIMS

This paper aims to give an understanding of the fundamentals of heat and mass transfer processes in engineering systems. The lectures will build on the basic principles learned in Thermofluid Mechanics papers in Part IA and IB tripos. Examples of practical heat transfer problems with multiple modes are addressed. In mass transfer, basic principles are introduced and practical problems are analysed.

SYLLABUS

1. Conduction Heat Transfer  (2L)

• Heat Equation
• Multi-dimensional steady-state conduction in solids
• Transient conduction:Biot and Fourier numbers, lumped capacitance
• Numerical methods

2. Radiation heat transfer  (2L)

• Spectral radiation
• Spectral absorptivity,emissivity, transmissivity
• Form factor calculations and approximations
• Numerical methods

3. Applications of Heat Transfer   (3L)

• Scaling analysis
• Examples involving mixed convection/conduction/radiation
• Examples involving phase change
• Examples using numerical tools

4. Convective heat transfer   (6L)

• Principles of convection
• Forced convection
• Free convection
• Heat exchanger
• Convection with phase change

5. Mass transfer  (3L)

• Conservation laws and constitutive relations
• Diffusion mass transfer
• Convective mass transfer
• Effect of chemical reactions (simple theories)

OBJECTIVES

On completion of the course students should be able to:

• Understand the different modes of heat transfer, and the physics governing the different modes

Convection Heat Transfer

• Understand the principles of convection.
• Understand the analogy between heat and momentum transfer
• Demonstrate the application of these principles to practical problems
• Understand the various regimes in boiling heat transfer and its significance and implications
• Analyse heat exchanger

Mass Transfer

• Understand the process of mass diffusion in gases, liquids, and solids
• Understand the relevant non-dimensional groups and their analogues in heat and momentum transfers
• Demonstrate the application of these understanding via an elementary analysis of a catalytic converter

Conduction Heat Transfer

• Understand the principles of conduction, heat equation and its behaviour subject to different boundary conditions
• Apply these principles to analyse engineering problems involving heat conduction

Radiation Heat Transfer

• Understand the principles governing radiation heat transfer
• Apply the principles of radiation heat transfer to solve engineering problems and understand natural phenomena

REFERENCES

Please see the Booklist for Part IIA Courses for references for this module.

                                                                                   

Last updated:January 2013

teaching-office@eng.cam.ac.uk