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Purdue School of Engineering and Technology

Purdue School of Engineering and Technology

Heat and Mass Transfer

ME 31400 / 4 Cr. (3 Class, 2 Lab)

Fundamental principles of heat transfer by conduction, convection, and radiation; mass transfer by diffusion and convection. Application to engineering situations.

Textbooks

T. Bergman and A. Lavine, Fundamentals of Heat and Mass Transfer, Wiley, 7th Edition.

Goals

To teach students a basic understanding of the laws of heat and mass transfer and to provide the opportunity to apply these laws to simple engineering situations.

Outcomes

After completion of this course, the students should be able to:

  1. Explain the physical origins of heat and mass transfer, identify important modes of heat transfer in a given situation, and make appropriate assumptions. [a]
  2. Calculate heat transfer rate and temperature distribution in steady-state one-dimensional heat conduction problems. [a,e]
  3. Sketch temperature profiles in one-dimensional heat transfer, showing the qualitative influence of energy generation, non-planar geometry, or time dependence. [a]
  4. Calculate the rate of steady heat transfer in fins, and unsteady heat transfer in lumped-capacitance and semi-infinite solid problems.[a,e]
  5. Calculate the rate of mass diffusion in one-dimensional problems, with or without bulk motion effects. [a,e]
  6. Explain the terms in the governing equations for convective heat and mass transfer. [a]
  7. Estimate convective transfer rates on the basis of geometric and dynamic similarity, and analogy between different convective transport processes. [a,e]
  8. Calculate heat and mass transfer rates in external and internal flows, including flat plates, cylinders, pipes, heat exchangers, and free convection at vertical surfaces. [a,e]
  9. Explain how radiation can be described based on its wavelength, source, and direction, and explain the basic concepts of blackbody radiation, reflectivity, emissivity, and absorptivity for surface radiation. [a]
  10. Apply the laws of radiation to compute heat transfer rates for surfaces, such as black bodies and diffuse gray surfaces, with appropriate approximations. [a,e]
  11. Calculate and use the view factor for simple surface combinations, and the total emissivity for surfaces. [a,e]

Note: The letters within the brackets indicate the general program outcomes of mechanical engineering. See: ME Program Outcomes.

Topics
  1. Rate equations and conservation laws
  2. Diffusion of heat and mass
    1. The diffusion equation
    2. One dimensional steady state conduction
    3. Two dimensional steady state conduction
    4. Transient conduction
  3. Convection
    1. Boundary layers, analogies
    2. External flow
    3. Internal flow
    4. Free convection
    5. Mixed convection
  4. Radiation
    1. Fundamental concepts
    2. Radiation exchange between surfaces
  5. Multi-mode heat and mass transfer
Laboratory Outcomes

After completion of this course, the students should be able to:

  1. Measure steady heat conduction rate in simple and composite bars, across fluid layers, and from fins. [a,b]
  2. Measure time constant of transient heat transfer for small objects modeled by lumped capacitance theory. [a,b]
  3. Apply control volume analysis to two-dimensional heat conduction using a computer program and using the heat flux plot method. [a,b]
  4. Measure steady heat transfer rates in free convection and boiling phenomena, and in heat exchangers. [a,b]
  5. Verify the Stefan-Boltzmann Law of heat radiation, and measure radiant heat transfer between two plates. [a,b]
  6. Work in teams to obtain and process data accurately, and report experimental work individually. [b,a,d,g,k]

Note: The letters within the brackets indicate the general program outcomes of mechanical engineering. See: ME Program Outcomes.

Laboratory Experiments
  1. Conduction Along a Simple Bar
  2. Conduction Along a Composite Bar
  3. Conduction in Fluids
  4. Heat Transfer from Fins
  5. Lumped Heat Capacitance
  6. 2-D Heat Conduction
  7. 2-D Heat Convection (numerical)
  8. Free Convection
  9. Boiling Heat Transfer
  10. Heat Exchangers
  11. Stefan-Boltzmann Law
  12. Radiant Intercommunication