Abstract Mesh distribution is an important part of the calculation in many thermal hydraulic system codes. Changing the mesh size is a common way to improve the calculation accuracy and efficiency. Automatic adjustment of the mesh size is an essential feature of adaptive mesh methods, among which the moving mesh method is a typical one. With the moving mesh method, mesh number can stay the same when adjusting the mesh distribution, which effectively benefits the calculation accuracy. In this research, the moving mesh method is added into a simplified one-dimension thermal hydraulic system code. Three numerical simulations are performed to validate the feasibility and validity of the moving mesh method added into the one-dimension thermal hydraulic system code. And an applicable way to selecting the coefficient in the weight function is proposed. The calculation results show that the accuracy in these cases has been improved, without reducing the efficiency.

中文翻译：

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动网格法在热力液压系统代码中的应用

摘要 网格分布是许多热力液压系统代码中计算的重要组成部分。改变网格大小是提高计算精度和效率的常用方法。网格尺寸的自动调整是自适应网格方法的基本特征，其中移动网格方法是典型的一种。采用动网格法，在调整网格分布时，网格数可以保持不变，有效地提高了计算精度。本研究在简化的一维热工液压系统代码中加入动网格法。进行了三个数值模拟，以验证添加到一维热工液压系统代码中的动网格方法的可行性和有效性。并提出了一种在权重函数中选择系数的适用方法。