MAK302

School of Engineering \ Mechanical Engineering

3

6

Compulsory

English

MAK201

Mechanical Engineering

Modes of heat transfer, steady one-dimensional heat conduction, thermal resistances, lumped system analysis, forced convection heat transfer, heat exchangers, radiation heat transfer.

1. “Heat and Mass Transfer: Fundamentals and Applications”, 6th Edition in SI Units, Yunus A. Çengel & Afshin J. Ghajar, McGraw Hill, 2015, ISBN: 978-9813158962.
2. “Temel Isı Transferi”, H. Yüncü, S. Kakaç, Bilim Yayıncılık, 1999, ISBN: 9789755560366.
3. “Fundamentals of Heat and Mass Transfer”, F.P. Incropera, D.P. DeWitt, T.L. Bergman, A.S. Lavine, 7th Edition, John Wiley & Sons, 2011, ISBN: 978-0470501979.

The objective of the course is to give mechanical engineering students the fundamental physics of heat transfer by conduction, convection and radiation. Students are instructed in the analysis and solution of basic heat transfer problems, as supplemented by analytical methods, practical tables, charts and empirical correlations.

1. Students gain the ability to formulate heat conduction problems from first principles by applying energy conservation and Fourier's law, and to derive the governing differential equation with appropriate boundary and initial conditions in the relevant coordinate system (Cartesian, cylindrical, or spherical).
2. The analysis and solutions of heat conduction problems are learned by selecting and applying appropriate methods—such as thermal resistance networks, finned surface analysis, and lumped system analysis—to determine temperature distributions and heat transfer rates.
3. Students gain the ability to analyze convective heat transfer in external and internal flows based on Newton's law of cooling, and to select and apply appropriate empirical correlations, charts, and tables.
4. Students gain knowledge about the analysis of radiative heat transfer between surfaces, including black and gray surfaces, using radiation properties, view factors, and the Stefan-Boltzmann law.

Week 1: Fundamentals of Heat Transfer: Heat Transfer Mechanisms, Heat Conduction, Thermal Conductivity, Heat Transfer by Convection and Radiation.
Week 2: Heat Conduction: One-Dimensional Heat Conduction Equation, General Heat Conduction Equation.
Week 3: Steady Heat Conduction: Boundary Conditions, Solution of Steady One-Dimensional Heat Conduction Problems, Heat Generation in a Solid.
Week 4: Steady Heat Conduction: Steady Heat Conduction in Plane Walls, Thermal Contact Resistance, Generalized Thermal Resistance Networks, Heat Conduction in Cylinders and Spheres, Critical Thickness of Insulation.
Week 5: Heat Transfer from Finned Surfaces: The Fin Equation, Fin Efficiency and Fin Effectiveness.
Week 6: Transient Heat Conduction and Forced Convection: Lumped System Analysis, Physical Mechanism of Convection, Classification of Fluid Flows, Velocity Boundary Layer, Thermal Boundary Layer, Laminar and Turbulent Flows.
Week 7: External Forced Convection: Parallel Flow over Flat Plates, Flow across Cylinders and Spheres, Flow across Tube Banks.
Week 8: Internal Forced Convection: Mean Velocity, Mean Temperature, the Entrance Region, Constant Surface Heat Flux and Surface Temperature Boundary Conditions, Laminar Flow in Tubes, Turbulent Flow in Tubes.
Week 9: Heat Exchangers: Types of Heat Exchangers, the Overall Heat Transfer Coefficient, Analysis of Heat Exchangers, the Log Mean Temperature Difference Method, the Effectiveness–NTU Method, Selection of Heat Exchangers.
Week 10: Thermal Radiation: Radiation Intensity, Blackbody Radiation, Radiative Surface Properties, Kirchhoff's Law, Atmospheric and Solar Radiation.
Week 11: View Factors: View Factor Relations, Radiation Heat Transfer between Black Surfaces.
Week 12: Radiation Heat Transfer: Radiation Heat Transfer between Gray Surfaces, Radiation Shields, the Radiation Effect.