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基于热辐射传输的布格尔定律,提出了一种求解大光学厚度介质内热辐射传递的移动区域蒙特卡罗法。以二维矩形区域内吸收性介质的热辐射传递为例,介绍了该方法的基本原理、求解区域设定及求解过程。通过数值模拟,从介质温度分布、抽样数密度两方面,对该方法和传统蒙特卡罗法进行了比较。研究结果表明,将该方法应用于大光学厚度介质内热辐射传递求解,可在满足计算精度要求的前提下,有效地减少计算时间及数据存贮量。
Based on Bouguer ’s law of heat radiation transmission, a moving region Monte Carlo method is proposed to solve the heat radiation transfer in a large optical thickness medium. Taking the radiative transfer of absorptive medium in a two-dimensional rectangular area as an example, the basic principle of the method is introduced, and the solution of regional setting and solving process is also given. Through numerical simulation, this method is compared with the traditional Monte Carlo method from two aspects of temperature distribution and sampling number density. The results show that this method can be used to solve the heat radiation transfer in large optical thickness medium, which can effectively reduce the calculation time and data storage under the premise of meeting the requirements of accuracy.