Characteristic parameters of diffusive supersonic radiation transport in low density materials

• 来源期刊: 中国物理（英文版）
• 关键词: radiation transport Mach number optical depth critical radiation temperature
• 年，卷（期）: 2007,（1）
• 页码范围: 193-199
• 页数: 7页
• 语种: 英文

摘要

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 τ. And it may also be expressed by radiation temperature heating material. The materiel density and length may be determined in order to aceve above-mentioned conditions when the driven temperature and duration are given.