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 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 radiationhydrodynamics. In low density material, it may be possible that theradiative energy flux dominates the material energy flux and thusenergy flow can be determined. In this paper by means of a simplealgebraic method, the expressions characterizing the condition ofdiffusion approximation and supersonic transport of heat wave arefound. In this case, the ratio of the radiative energy flux to thematerial energy flux is directly proportional to the product of Machnumber M multiplied by optical depth tau. And it may also beexpressed by radiation temperature heating material. The materialdensity and length may be determined in order to achieveabove-mentioned conditions when the driven temperature and durationare given. |
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| Keywords: | radiation transport Mach number optical depth critical radiation temperature |
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