The MCRT Method for Participating Media


So far we have only considered energy interactions between rays and surfaces. Two possible outcomes – absorption and reflection – have been identified, and corresponding models have been formulated and used to describe radiation heat transfer among surfaces. When a ray incident to a surface is neither absorbed nor reflected, it is said to be transmitted. Thermal radiation passing through lenses, filters, and the earth’s atmosphere are familiar examples of transmission. This chapter deals with emission, absorption, refraction, and scattering of thermal radiation within a medium through which it is propagating. Such media are said to be “participating.”

5.1Radiation in a Participating Medium
5.2Example: The Absorption Filter
5.3Ray Tracing in a Participating Medium
5.4Estimating the Radiation Distribution Factors in Participating Media
5.5Using the Radiation Distribution Factors When All Temperatures are Specified
5.6Using the Radiation Distribution Factors for a Mixture of Specified Temperatures and Specified Heat Transfer Rates
5.7Simulating Infrared Images

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