Abstract Diffusive heat waves play an important role in radiation hydrodynamics. In low density material, it may be possible that the radiative energy flux dominates the material energy flux and thus energy flow can be determined. In this paper by means of a simple algebraic method, the expressions characterizing the condition of diffusion approximation and supersonic transport of heat wave are found. In this case, the ratio of the radiative energy flux to the material energy flux is directly proportional to the product of Mach number M multiplied by optical depth $\tau$. And it may also be expressed by radiation temperature heating material. The material density and length may be determined in order to achieve above-mentioned conditions when the driven temperature and duration are given.
Received: 08 August 2005
Revised: 02 January 2006
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China(Grant Nos 50528707 and 50537020).
Cite this article:
Jiang Shao-En(江少恩), Yang Jia-Min(杨家敏), Zheng Zhi-Jian(郑志坚), and Ding Yong-Kun(丁永坤) Characteristic parameters of diffusive supersonic radiation transport in low density materials 2007 Chinese Physics 16 193
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