Characteristic parameters of diffusive supersonic radiation transport in low density materials |
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| Authors: | Jiang Shao-En Yang Jia-Min Zheng Zhi-Jian and Ding Yong-Kun |
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| Affiliation: | National Key Laboratory of Laser Fusion, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China |
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| 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. |
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| Keywords: | radiation transport Mach number optical depth critical radiation temperature |
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