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Numerical simulation of heat transfer in packed beds by two population thermal lattice Boltzmann method

机译:两种群热晶格玻尔兹曼方法对填充床传热的数值模拟

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The Lattice Boltzmann Method (LBM) was used for simulation of a gas flow and conjugate heat transfer in fixed packed beds with solid particles inside. D2Q9 version of the Factorized Central Moment (FCMLBM) is used for a gas flow computation. Heat transfer in the bed is described by second distribution function set and multiple relaxation time lattice Boltzmann method (DDF MRT LBM) is used. Numerical solver is implemented using NVIDIA CUDA framework and comparison of performance on different GPUs is presented as well. Validation of the code is done using experimentally measured values of temperatures in fixed rock bed in a high-temperature thermal storage experiment. Next, the rate of heat transfer in a large scale fixed bed is numerically investigated, together with description of the bed's thermal characteristics for two different mass flow rates of hot air.
机译:格子Boltzmann方法(LBM)用于模拟内部装有固体颗粒的固定填充床中的气流和共轭传热。 D2Q9版本的分解中心矩(FCMLBM)用于气体流量计算。通过第二分布函数集描述床中的传热,并使用多重弛豫时间格子Boltzmann方法(DDF MRT LBM)。数值求解器使用NVIDIA CUDA框架实现,并且还介绍了不同GPU上的性能比较。使用高温储热实验中固定岩石层中温度的实验测量值来完成代码的验证。接下来,对大型固定床中的传热速率进行了数值研究,并描述了两种不同质量流量的热风床的热特性。

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