Abstract The pore-scale numerical simulation of fluid flow and heat transfer processes in the random structures are given. By comparing the simulation results with the corresponding experimental data, the validity of the structure model and the heat transfer model are verified. The macro analysis is given, it is found that the mean porosity, various flow scalars and heat transfer scalars in the packed structures are all periodically distributed, and the influence of inlet velocities, spheres size and other parameters on the turbulence and temperature field in porous media is described in detail. The large eddy simulation (LES) method is used to study the flow and temperature field under pore-scale in the local porous structure, the distribution characteristic of eddies in porous structure was obtained, and the change regulation of isothermal surface shape (fractal dimension of surface) with heating is also given.

中文翻译：

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随机填充床中湍流和传热特性的多尺度模拟

摘要 给出了随机结构中流体流动和传热过程的孔隙尺度数值模拟。通过将仿真结果与相应的实验数据进行对比，验证了结构模型和传热模型的有效性。宏观分析发现，填充结构中的平均孔隙率、各种流动标量和传热标量均呈周期性分布，入口速度、球体尺寸等参数对多孔结构中湍流和温度场的影响媒体详细介绍。采用大涡模拟(LES)方法研究局部多孔结构中孔隙尺度下的流场和温度场，得到了多孔结构中涡的分布特征，