Heat transfer, or the study of the temperature distribution in structures, plays an important role in almost any engineering system. From small devices such as smartphones to large gas turbines, understanding and controlling heat can improve the performance and reliability of engineered products. This course will provide you a big picture of thermal analysis: why do engineers care about heat transfer problems, where such analysis should be applied and what role should we engineers play in heat transfer simulation. Getting answers to these questions will lay an excellent foundation for you to learn more about heat transfer and apply the knowledge in engineering problems. In addition, the basis of the three heat transfer modes, conduction, convection, and radiation, will be discussed with physical meaning explained and life-related examples.