Advanced Heat Transfer: Thermal Radiation
What you'll learn
- Classify electromagnetic radiation, and identify thermal radiation
- Understand the idealized blackbody, and calculate the total and spectral blackbody emissive power
- Calculate the fraction of radiation emitted in a specified wavelength band using the blackbody radiation functions
- Understand the concept of radiation intensity, and define spectral directional quantities using intensity
- Develop a clear understanding of the properties emissivity, absorptivity, relflectivity, and transmissivity on spectral, directional, and total basis
- Apply Kirchhoff’s law to determine the absorptivity of a surface when its emissivity is known
- Define view factor, and understand its importance in radiation heat transfer calculations
- Develop view factor relations, and calculate the unknown view factors in an enclosure by using these relations
- Calculate radiation heat transfer between black surfaces
- Determine radiation heat transfer between diffuse and gray surfaces in an enclosure using the concept of radiosity
- Quantify the effect of radiation shields on the reduction of radiation heat transfer between two surfaces
- Fundamentals of Heat Transfer Course
- Engineering Thermodynamics Course
Delve into Electromagnetic Waves, Thermal Radiation, and Radiative Properties: Comprehensive Insights and Real-World Applications
In this course, we begin by examining electromagnetic waves and the electromagnetic spectrum, focusing on thermal radiation. We introduce the concept of the idealized blackbody, blackbody radiation, and blackbody radiation function, along with key principles such as the Stefan-Boltzmann law, Planck's law, and Wien's displacement law.
We explore the radiation emitted by every point on a plane surface in all directions into the hemisphere above the surface, and study the radiation intensity that describes the magnitude of radiation emitted or incident in specific directions. Key radiation fluxes like emissive power, irradiation, and radiosity are discussed in terms of intensity. The course also covers radiative properties of materials, including emissivity, absorptivity, reflectivity, and transmissivity, and their dependencies on wavelength, direction, and temperature. The greenhouse effect serves as an example of the consequences of wavelength-dependent radiation properties.
The course further delves into view factors and their associated rules, providing view factor expressions and charts for common configurations and introducing the crossed-strings method. We discuss radiation heat transfer between black surfaces and nonblack surfaces using the radiation network approach. Finally, we examine radiation shields and their effects on radiation.
Throughout the course, you will gain a comprehensive understanding of electromagnetic waves, thermal radiation, and radiative properties, preparing you to apply these concepts in real-world scenarios. Enroll now to enhance your knowledge of radiation and its implications in various applications
Who this course is for:
- Engineering Students
Samer is currently a Professor of Mechanical Engineering. He has ten years of teaching experience in thermo-fluid courses which include:
3-Internal Combustion Engines
6-Power Plant Engineering
8-Computational Fluid Dynamics CFD
Moreover, Prof. Samer is involved in a wide research projects in Computational Fluid Dynamics (CFD), Fluid-Structure Interaction and numerical simulations applied to multi-functional heat exchangers/reactors. Prof. Samer has authored and co-authored several highly cited journal publications, conferences in the aforementioned topics.