Abstract The knowledge of particles that remain in the furnace is important for the efficiency of a thermal particle treatment process. These particles mainly stick to the combustion chamber wall and represent a material loss. To predict the amount of particle-wall contacts in such furnaces, a numerical model based on transient multiphase flow calculations is presented in this work. The proposed model differs from the current state-of-the-art CFD models as follows: Instead of using the commonly used RANS turbulence models (realizable-k-e model, Reynolds stress model) and steady state calculations, large eddy simulations (LES) of the multiphase flow in the furnace in combination with a type of RANS mesh were performed. Furthermore, the applicability of the LES technique was evaluated by comparing the numerical results to measurements. It was found that the proposed numerical model provides more accurate prediction performance than applying common RANS turbulence models.

中文翻译：

---

湍流模型对颗粒-壁面接触在热颗粒处理工业炉数值模拟中的影响

摘要 了解留在炉中的颗粒对于热颗粒处理过程的效率很重要。这些颗粒主要粘附在燃烧室壁上并造成材料损失。为了预测这种熔炉中颗粒-壁面接触的数量，本文提出了一种基于瞬态多相流计算的数值模型。所提出的模型与当前最先进的 CFD 模型的不同之处如下： 不使用常用的 RANS 湍流模型（realizable-ke 模型、雷诺应力模型）和稳态计算，而是使用大涡模拟 (LES)结合一种 RANS 网格进行了炉中的多相流。此外，通过将数值结果与测量值进行比较来评估 LES 技术的适用性。