Advanced Heat Transfer: Thermal Radiation from Udemy

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

What's inside

Learning objectives

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
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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
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Show less

Syllabus

Fundamentals of Thermal Radiation

Introduction

Radiant Heat Fluxes

Radiation Intensity: Solid Angle

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Read about what's good

what should give you pause

and possible dealbreakers

Explores radiative properties like emissivity, absorptivity, reflectivity, and transmissivity, which are crucial for understanding material behavior in thermal systems

Covers the Stefan-Boltzmann law, Planck's law, and Wien's displacement law, which are fundamental principles in thermal radiation analysis and design

Examines radiation heat transfer between black and nonblack surfaces using the radiation network approach, a method widely used in engineering calculations

Discusses radiation shields and their effects, which is relevant for designing systems where minimizing heat transfer is important

Requires a strong foundation in heat transfer principles, making it more suitable for learners with prior experience in the field

Focuses on the radiation network approach, which may not cover more advanced computational methods used in modern heat transfer simulations

Reviews summary

In-depth thermal radiation concepts

According to learners who have taken this course, it offers a clear and comprehensive deep dive into advanced thermal radiation concepts. Students particularly appreciate the well-structured approach, moving logically from fundamentals like electromagnetic waves and blackbody radiation to more complex topics such as view factors and radiation exchange. Many found the inclusion of numerous examples and practical applications to be highly beneficial in solidifying theoretical understanding. The course content is described as rigorous and suitable for those with a foundational knowledge of heat transfer, providing a solid theoretical basis for tackling real-world problems.

Logical flow builds understanding from basics up.

"The course structure flows logically from fundamentals to advanced topics."

"Syllabus covers key areas like view factors and radiation exchange thoroughly."

"Topics are presented in a helpful sequence that builds upon prior lessons."

Useful examples help solidify theoretical understanding.

"The examples provided throughout the course were incredibly helpful."

"Applying the concepts to real-world scenarios was very useful for me."

"I appreciate the numerous examples used to demonstrate principles."

Complex topics are explained clearly and logically.

"The professor's explanations made complex ideas very understandable."

"Everything was laid out very clearly and logically."

"I finally grasped thermal radiation concepts thanks to the lectures here."

Solid prerequisite knowledge is highly recommended.

"Make sure you have basic heat transfer knowledge before taking this one."

"Some parts were challenging without prerequisites in thermal physics."

"Recommended for those with some prior exposure to the subject area."

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Advanced Heat Transfer: Thermal Radiation with these activities:

Review Electromagnetic Theory

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Reviewing electromagnetic theory will help you understand the fundamental principles behind thermal radiation.

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Review the properties of electromagnetic waves.
Study Maxwell's equations and their implications.
Practice problems related to wave propagation.

Read 'Heat Transfer' by Yunus A. Cengel

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Reading this book will provide a solid foundation in heat transfer, including thermal radiation.

View Melania on Amazon

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Read the chapter on thermal radiation.
Work through the example problems.
Relate the concepts to the course material.

Read 'Thermal Radiation Heat Transfer' by Robert Siegel and John R. Howell

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Reading this book will provide a deeper understanding of the concepts covered in the course.

View Thermal Radiation Heat Transfer, Fourth Edition on Amazon

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Read the chapters related to radiative properties and view factors.
Work through the example problems in the book.
Compare the book's explanations with the course material.

Four other activities

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Solve View Factor Problems

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Practicing view factor calculations will solidify your understanding of radiation exchange between surfaces.

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Find practice problems online or in textbooks.
Calculate view factors for various geometries.
Verify your solutions using view factor relations.

Create a Presentation on Radiation Shields

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Creating a presentation will help you synthesize your knowledge of radiation shields and their applications.

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Research different types of radiation shields.
Prepare slides explaining the principles of radiation shields.
Include examples of real-world applications.
Present your findings to a peer or colleague.

Model Radiation Heat Transfer in a Furnace

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Modeling radiation heat transfer in a furnace will provide practical experience in applying the concepts learned in the course.

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Choose a specific furnace design to model.
Develop a computational model using software like ANSYS or COMSOL.
Simulate radiation heat transfer within the furnace.
Analyze the results and draw conclusions.

Create a Radiosity Solver

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Creating a radiosity solver will provide a deep understanding of radiation exchange calculations.

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Research the radiosity method for radiation heat transfer.
Implement the radiosity equations in a programming language.
Test your solver with various geometries and boundary conditions.
Document your code and results.

Career center

Learners who complete Advanced Heat Transfer: Thermal Radiation will develop knowledge and skills that may be useful to these careers:

Thermal Engineer

A thermal engineer focuses on managing heat and temperature within systems and devices. This includes designing, developing, and testing thermal management solutions for diverse applications. This course provides directly applicable information for a thermal engineer. A strong understanding of blackbody radiation, radiant heat fluxes, and radiative properties helps one to analyze and optimize heat transfer within equipment and systems. In particular, the course's examination of radiation shields is relevant to thermal management design. Professionals who aspire to become thermal engineers will find this course to be quite valuable.

See salaries and explore the career path for Thermal Engineer

Mechanical Engineer

Mechanical engineers design, develop, build, and test mechanical and thermal devices, including tools, engines, and machines. Thermal considerations are a frequent element of the role. This course directly applies to the practice of a mechanical engineer. The course will assist you in improving your knowledge of thermal radiation and radiative properties. You can apply that information to improve the performance of diverse mechanical and thermal devices. Moreover, understanding concepts like radiation shields and radiation heat transfer can lead to a better design of mechanical components. This is quite beneficial for mechanical engineers.

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Solar Energy Engineer

Solar energy engineers design and implement systems that convert sunlight into usable energy. Understanding thermal radiation is paramount in this field since solar energy collection relies heavily on radiative heat transfer principles. In this role, you might create new solar panels or new solar power systems. This course can be quite useful as it provides a comprehensive understanding of electromagnetic waves, thermal radiation, and radiative properties. The course's coverage of blackbody radiation and radiative properties of materials provides a strong foundation for optimizing the performance of solar collectors. Also, the lessons on radiation shields may allow one to optimize the performance of solar powered components.

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Optical Engineer

Optical engineers design and develop optical instruments and systems, often working with electromagnetic radiation and its properties. The design of systems that either transmit radiant energy or block it from reaching sensitive components is quite important. This course directly applies to the work of the optical engineer. Given that this course examines electromagnetic waves and thermal radiation, it provides essential knowledge for understanding the behavior of light and heat in optical systems. An optical engineer can improve system and device performance by focusing on the sections on radiative properties and radiation intensity. Professionals hoping to become optical engineers would find this course quite useful.

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Renewable Energy Consultant

Renewable energy consultants advise clients on the selection, design, and implementation of renewable energy systems, such as solar thermal systems. A thorough understanding of thermal radiation, heat transfer, and solar energy principles is essential for this role. This course is directly relevant to the work of a renewable energy consultant. Given that this course examines thermal radiation and radiative properties. it provides knowledge for understanding the behavior of heat in renewable energy systems. The consultant also requires familiarity with related regulations and incentives. This course would be quite useful for professionals who hope to become renewable energy consultants.

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Research Scientist

A research scientist conducts investigations and experiments to expand scientific knowledge. Those specializing in heat transfer or thermal sciences would find this course to be valuable. The course's comprehensive coverage of electromagnetic waves, thermal radiation, and view factors provides a strong foundation for conducting research in these areas. The modules on blackbody radiation, radiative properties, and radiation exchange between surfaces will be very applicable. Given that this course is designed to provide learners with real world applications, professionals who aspire to become research scientists may find this course to be valuable to their careers.

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Manufacturing Engineer

Manufacturing engineers are responsible for designing, implementing, and optimizing manufacturing processes and systems. Heat treatment and thermal management are a common element of the role. This course directly applies to the practice of a manufacturing engineer. The course will assist you in improving your knowledge of thermal radiation and radiative properties. You can apply that information to improve the performance of manufacturing processes, such as heat treatment. Understanding concepts like radiation shields and radiation heat transfer can lead to a better design of manufacturing systems. This is quite beneficial for manufacturing engineers.

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Energy Auditor

An energy auditor assesses the energy efficiency of buildings and systems, identifying areas for improvement and recommending energy-saving measures. Understanding heat transfer is critical for identifying sources of energy loss and optimizing building performance. The course's modules on radiant heat fluxes, radiative properties, and radiation exchange between surfaces will give an energy auditor the tools necessary to locate radiative energy losses. Moreover, the course provides an understanding of the greenhouse effect, which can be useful when evaluating a building's losses.

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Professor

A professor is an expert in a subject matter who lectures on that subject to students, typically at the university level. A professor who teaches courses on heat transfer, thermodynamics, or mechanical engineering needs a thorough understanding of thermal radiation. This course will be useful for a professor. The course's complete treatment of electromagnetic waves, thermal radiation, and view factors gives a strong base for teaching these topics. The professor can use the modules on blackbody radiation, radiative properties, and radiation exchange between surfaces as a basis for preparing lectures. Professionals who aspire to become professors may find this course to be valuable to their career and to their students.

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Aerospace Engineer

Aerospace engineering involves the design, development, and testing of aircraft and spacecraft. Thermal management is crucial in this field due to extreme temperature variations in flight. This course may be useful for an aerospace engineer. The course's deep dive into thermal radiation as well as radiative properties of materials is valuable as it provides insights into how heat is transferred within an aircraft or spacecraft. Specifically, the course's discussion of view factors and radiation heat transfer between surfaces is particularly applicable to designing effective thermal control systems for satellites and spacecraft. Aspiring aerospace engineers should consider this course.

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Sustainability Consultant

Sustainability consultants advise organizations on how to reduce their environmental impact and improve their sustainability performance. A solid understanding of thermal radiation and energy efficiency principles is helpful in addressing many sustainability challenges. This course can be quite useful for a sustainability consultant. In particular, the course's discussion of the greenhouse effect and radiative properties of materials can help a consultant to create plans to reduce emissions. Aspiring sustainability consultants should give this course consideration.

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Product Development Engineer

A product development engineer designs and improves products, thinking carefully about real-world applications. Thermal considerations are important in a wide range of consumer goods. This course may be useful for a product development engineer. The course will assist you in improving your knowledge of thermal radiation and radiative properties. You can apply that information to improve the performance of products. Moreover, understanding concepts like radiation shields and radiation heat transfer can lead to a better design of diverse parts of products. This could be beneficial for product development engineers.

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HVAC Designer

Heating, ventilation, and air conditioning (HVAC) designers are responsible for creating efficient and effective climate control systems for buildings. Understanding heat transfer mechanisms, including radiation, is essential for optimizing system performance. Taking this course may be useful for an HVAC designer. The study of radiant heat fluxes, blackbody radiation, and radiative properties helps to understand how heat is gained or lost through building materials and surfaces. Furthermore, the analysis of radiation exchange between surfaces assists in designing energy-efficient HVAC systems. This course could be valuable to those aspiring to become HVAC designers.

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Materials Scientist

Materials scientists research and develop new materials with specific properties. Understanding how materials interact with thermal radiation is crucial for various applications, including thermal insulation, solar energy absorption, and aerospace engineering. This course may be useful for a materials scientist as it provides knowledge about properties like emissivity, absorptivity, reflectivity, and transmissivity. The course’s coverage of the radiative properties of materials and Kirchhoff's law will enable materials scientists to tailor the thermal behavior of materials based on the composition or surface properties of the materials. Aspiring materials scientists should consider this course.

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Test Engineer

A test engineer is responsible for designing and executing tests to ensure that products meet required specifications and performance standards. Thermal testing is a component of the role. This course may be useful for a test engineer. The understanding of thermal radiation is important for designing and interpreting thermal tests. The course modules on radiative properties, blackbody radiation, and radiation heat transfer may be useful in the design of thermal tests. Test engineers who focus on thermal testing could find this course valuable.

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Reading list

We've selected two books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Advanced Heat Transfer: Thermal Radiation.

Thermal Radiation Heat Transfer, Fourth Edition

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Comprehensive resource on thermal radiation, covering fundamental principles and advanced applications. It provides in-depth explanations of radiative properties, view factors, and radiation exchange between surfaces. It is commonly used as a textbook in graduate-level heat transfer courses. This book adds significant depth to the course material and serves as an excellent reference for engineers and researchers.

Thermal Radiation Heat Transfer, Fourth Edition

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Advanced Heat Transfer

Thermal Radiation

What's inside

Learning objectives

Syllabus

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Reviews summary

In-depth thermal radiation concepts

Activities

Career center

Reading list

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