### 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.

**Available Online:** No

**Credit by Exam:** No

**Laptop required:** No

**Prerequisites/Co-requisites:**

P: ME 31000.

##### Textbooks

F. P. Incropera and D.P. Dewitt, Fundamentals of Heat and Mass Transfer, Wiley, Sixth Edition, 2006.

##### 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:**

- Explain the physical origins of heat and mass transfer, identify important modes of heat transfer in a given situation, and make appropriate assumptions. [a]
- Calculate heat transfer rate and temperature distribution in steady-state one-dimensional heat conduction problems. [a,e]
- Sketch temperature profiles in one-dimensional heat transfer, showing the qualitative influence of energy generation, non-planar geometry, or time dependence. [a]
- Calculate the rate of steady heat transfer in fins, and unsteady heat transfer in lumped-capacitance and semi-infinite solid problems.[a,e]
- Calculate the rate of mass diffusion in one-dimensional problems, with or without bulk motion effects. [a,e]
- Explain the terms in the governing equations for convective heat and mass transfer. [a]
- Estimate convective transfer rates on the basis of geometric and dynamic similarity, and analogy between different convective transport processes. [a,e]
- 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]
- 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]
- 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]
- 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

- Rate equations and conservation laws (1 class)
- Diffusion of heat and mass (10 classes)
- The diffusion equation
- One dimensional steady state conduction
- Two dimensional steady state conduction
- Transient conduction

- Convection (8 classes)
- Boundary layers, analogies
- External flow
- Internal flow
- Free convection
- Mixed convection

- Radiation (5 classes)
- Fundamental concepts
- Radiation exchange between surfaces

- Multi-mode heat and mass transfer (1 class)
- Review (1 class)
- Tests (3 classes)

##### Laboratory Outcomes

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

- Measure steady heat conduction rate in simple and composite bars, across fluid layers, and from fins. [a4,b]
- Measure time constant of transient heat transfer for small objects modeled by lumped capacitance theory. [a4,b]
- Apply control volume analysis to two-dimensional heat conduction using a computer program and using the heat flux plot method. [a4,b]
- Measure steady heat transfer rates in free convection and boiling phenomena, and in heat exchangers. [a4,b]
- Verify the Stefan-Boltzmann Law of heat radiation, and measure radiant heat transfer between two plates. [a4,b]
- Work in teams to obtain and process data accurately, and report experimental work individually. [b,a3,d,g,k4]

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

##### Laboratory Experiments

- Conduction Along a Simple Bar
- Conduction Along a Composite Bar
- Conduction in Fluids
- Heat Transfer from Fins
- Lumped Heat Capacitance
- 2-D Heat Conduction
- 2-D Heat Convection (numerical)
- Free Convection
- Boiling Heat Transfer
- Heat Exchangers
- Stefan-Boltzmann Law
- Radiant Intercommunication