分形介质导热问题中声子的作用

THE ROLE OF PHONON IN HEAT CONDUCTION OF FRACTAL MEDIUM

从声子的性质出发阐述了声子在分形介质导热问题中的作用,得出了以下结论:分形介质中声子导热的频域为Al～Aξ,而不再象均匀介质那样为0～ωm;同一材料组分时分形介质的定容比热要小于均匀介质的定容比热。

Theoretically based on the nature of phonon and its role in heat conduction of fractal medium. The conclusion is drawn as follows :the heat-conduction frequency scope of phonon in fractal medium is Al-Aζ, not like that in uniform medium (0-ωm). For the uniform mediums of same material , the specific heat at constant volume is less greater than that of uniform medium . The conclusion tallies with the result of experiments.