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In analyzing radiation heat transfer in disperse systems containing small particles, a single particle is usually considered to be isothermal. This assumption greatly simplifies the calculation of the thermal radiation of the particle (Dombrovsky, 1996; Modest, 2003; Viskanta, 2005). At the same time, in the case of intensive heating or cooling, the temperature difference between the center and the surface of the particle may be considerable. This can be realized not only in the case of fast heati ...

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