Effect of stochastic deformation on the vibration characteristics of a tube bundle in axial flow: code and data

These files accompany the following publication:

Dolfen, H., Vandewalle, S., & Degroote, J. (2023). Effect of stochastic deformation on the vibration characteristics of a tube bundle in axial flow. Nuclear Engineering and Design, 411, 112412. doi:10.1016/j.nucengdes.2023.112412.

In this publication the effect of a stochastic bow deformation on the vibration characteristics of a tube bundle was investigated. The Monte Carlo and generalized Polynomial Chaos (gPC) method were used. For the latter method, the chaospy Python-package was used. Further dependencies include the numpy, scipy and matplotlib Python packages. The gPC was benchmarked with the Monte Carlo method on a steady CFD case. The the gPC was used on an FSI case used to extract the output quantity of interest, the vibration characteristics. This FSI case was run in the open-source code CoCoNuT. This code developed at Ghent University is Python-based and has the capability to couple existing solvers, both open-source and commercial solvers.

The archive includes scripts to set-up the steady CFD case as well as the FSI case, the used version of CoCoNuT and some post-processing scripts. ReadMe files are provided to explain the files, and what adjustments are likely needed to make it work on a different system. For CoCoNuT to work, the 'coconut' folder should be added to the PYTHONPATH environment variable. For requirements to run CoCoNuT, refer to the documentation.

本数据集配套如下学术出版物：

Dolfen, H.、Vandewalle, S.与Degroote, J.（2023）. 轴向流动中管束振动特性的随机形变效应. 《Nuclear Engineering and Design》（核工程与设计）, 411卷, 112412. DOI: 10.1016/j.nucengdes.2023.112412.

该研究探讨了随机弓形形变对管束振动特性的影响，分别采用蒙特卡洛（Monte Carlo）方法与广义多项式混沌（generalized Polynomial Chaos, gPC）方法开展分析。其中广义多项式混沌方法借助chaospy Python工具包实现，其余依赖项包括numpy、scipy及matplotlib Python工具包。

本研究以稳态计算流体动力学（Computational Fluid Dynamics, CFD）算例为基准，将gPC方法与蒙特卡洛方法进行了对标验证。随后将gPC方法应用于用于提取目标输出量——振动特性的流固耦合（Fluid-Structure Interaction, FSI）算例。该流固耦合算例通过开源代码CoCoNuT运行，此代码由根特大学（Ghent University）开发，基于Python语言构建，支持对接各类开源与商用现有求解器。

本归档文件包含稳态CFD算例与FSI算例的搭建脚本、所用版本的CoCoNuT代码，以及若干后处理脚本。附带的ReadMe文件将对各文件进行说明，并介绍在不同系统中运行所需的适配调整步骤。若需运行CoCoNuT，需将"coconut"文件夹添加至PYTHONPATH环境变量；关于CoCoNuT的运行依赖要求，请参考其官方文档。