View Factors

This lecture covers the concept of view factors, which are used to determine the fraction of radiation leaving one surface that is intercepted by another surface. It explains the calculation of view factors between surfaces with arbitrary orientations, the conditions for concave and convex surfaces, and the electrical analogy for radiation exchange. The lecture also discusses the net radiation exchange at a surface and in a two-surface enclosure, emphasizing the importance of understanding view factors in thermal radiation analysis.