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3-D radiation modeling of nongray gases-particles mixture by two different numerical methods

机译：通过两种不同的数值方法对非灰色气体-颗粒混合物进行3-D辐射建模

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摘要

A new methodology and code for 3-D radiation of nongray gases mixtures containing gray anisotropically scattering particles is developed. Radiative transfer equation (RTE) is solved by finite volume method (FVM) coupled with Smith's weighted sum of gray gases model (WSGGM) with 5 gray gases, but any other gas radiative properties model can be incorporated. Evaluation of scattering phase function (SPF) and analysis of anisotropically scattering particles were performed by Mie Theory (MT). Missing benchmark, another new 3-D model and code, which solve same problems, based on a combination of Zone Method (ZM) and Monte Carlo method (MC) is developed. In this method the same WSGGM and MT, as in previous methodology, is incorporated. Physical and mathematical concepts of both models are presented. To author's best knowledge these methodologies were not developed before. Series of predictions for the mixtures of real gases as carbon dioxide, water vapor and nitrogen containing various types of particles for non-uniform temperature field were performed by both methods in order to be compared. Agreement between the predictions of these two different numerical methods is very good. Model developed is sufficiently accurate and convenient for engineering calculations as well as for incorporation in computational fluid dynamics codes.
机译：针对含灰色各向异性散射粒子的非灰色气体混合物的3D辐射，开发了一种新的方法和代码。辐射传递方程（RTE）通过有限体积法（FVM）结合Smith的5种灰色气体的灰色气体加权总和模型（WSGGM）求解，但是可以合并任何其他气体辐射特性模型。散射相函数（SPF）的评估和各向异性散射颗粒的分析通过米氏理论（MT）进行。基于区域方法（ZM）和蒙特卡洛方法（MC）的组合，开发了缺少基准的另一种新的3-D模型和代码，可以解决相同的问题。在此方法中，与以前的方法中合并了相同的WSGGM和MT。介绍了两个模型的物理和数学概念。据作者所知，这些方法尚未开发。为了比较，通过两种方法对包括二氧化碳，水蒸气和氮在内的各种类型的非均匀温度场的实际气体混合物进行了一系列预测，以便进行比较。这两种不同数值方法的预测之间的一致性非常好。开发的模型对于工程计算以及纳入计算流体动力学代码而言足够准确且方便。

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