OpenFOAM cases for the Validation of the CHT Model

This dataset contains the<em> underlying data</em> for the paper " <em>Conjugate Heat Transfer Modeling of a Cold Plate Design for Hybrid-Cooled Data Centers</em>” in Energies Journal. https://www.mdpi.com/1996-1073/16/7/3088 Numerical simulations are performed using the open-source CFD code OpenFoam. Features of the numerical model described in the paper can be summarized as: This data set contains <em>OpenFoam</em> cases for the validation of the thermal model with the experimental data in the literature (Saitoh et al. 1993) using both <em>buoyantPimpleFoam</em> and <em>chtMultiRegionFoam</em> solvers. <em>Saitoh, T.; Sajiki, T.; Maruhara, K. Benchmark solutions to natural convection heat transfer problem around a horizontal circular cylinder. Int. J. Heat Mass Trans. 1993, 36, 1251–1259.</em> A multi-region unstructured mesh was created using Salome software and exported as unv files. The generated unv files can be found in the corresponding directories. <em>Allmesh</em> script imports regions from the unv files to the <em>OpenFoam</em> and runs <em>createPatch</em> file for the application of boundary conditions . <em>Allrun</em> script runs transient simulation using parallel computing. <em>postProcess</em> script compares case results with experimental results and generates a plot in the directory results. Flow inside air and water regions are considered as laminar due to the low Reynolds numbers. Numerical schemes used in the solutions of constitutive equations are carefully selected to obtain results consistent with the experimental data. A new function object is developed for the calculation of the Nusselt number on the cylinder. This library can be downloaded via the following link and sould be compiled before cases are run: https://github.com/DSTECHNO/NusseltNumber <strong>FreeConvectionBPF.tar.gz:</strong> <em>OpenFoam</em> files and scripts for the transient simulation of free convection case using <em>buoyantPimpleFoam</em> solver. <strong>FreeConvectionCHT.tar.gz:</strong> <em>OpenFoam</em> files and scripts for the transient simulation of free convection case using <em>chtMultiRegionFoam</em> solver. <strong>ForcedConvectionBPF.tar.gz:</strong> OpenFoam files and scripts for the transient simulation of forced convection case using <em>buoyantPimpleFoam</em> solver. <strong>ForcedConvectionCHT.tar.gz: </strong><em>OpenFoam</em> files and scripts for the transient simulation of forced convection case using <em>chtMultiRegionFoam</em> solver.

本数据集包含发表于《Energies》期刊的论文《Conjugate Heat Transfer Modeling of a Cold Plate Design for Hybrid-Cooled Data Centers》的底层支撑数据，论文官方链接为：https://www.mdpi.com/1996-1073/16/7/3088。本研究采用开源计算流体动力学（Computational Fluid Dynamics, CFD）代码OpenFoam开展数值模拟。论文中所述数值模型的核心特征可归纳如下：
本数据集包含两类OpenFoam算例，分别采用buoyantPimpleFoam与chtMultiRegionFoam求解器，用于基于文献[Saitoh等，1993]中的实验数据验证热学模型。
相关参考文献：Saitoh, T.; Sajiki, T.; Maruhara, K. 水平圆柱周围自然对流换热的基准解，《国际热质传递学报（Int. J. Heat Mass Trans.）》，1993年，第36卷，pp.1251–1259。
研究团队采用Salome软件创建多区域非结构化网格，并将其导出为unv格式文件，生成的unv网格文件可在对应目录中获取。Allmesh脚本用于将unv文件中的区域导入OpenFoam，并执行createPatch文件以配置边界条件。Allrun脚本通过并行计算模式运行瞬态模拟。postProcess脚本用于将算例结果与实验结果进行比对，并在results目录中生成可视化对比图表。
由于流动的雷诺数较低，空气与流体区域内的流动均按层流处理。本研究精心选取本构方程求解的数值格式，以确保计算结果与实验数据保持一致。
本研究开发了一款全新的函数对象，用于计算圆柱表面的努塞尔数（Nusselt number）。该函数库可通过以下链接下载，且需在运行算例前完成编译：https://github.com/DSTECHNO/NusseltNumber
1. **FreeConvectionBPF.tar.gz**：采用buoyantPimpleFoam求解器开展自然对流瞬态模拟的OpenFoam文件与配套脚本。
2. **FreeConvectionCHT.tar.gz**：采用chtMultiRegionFoam求解器开展自然对流瞬态模拟的OpenFoam文件与配套脚本。
3. **ForcedConvectionBPF.tar.gz**：采用buoyantPimpleFoam求解器开展强制对流瞬态模拟的OpenFoam文件与配套脚本。
4. **ForcedConvectionCHT.tar.gz**：采用chtMultiRegionFoam求解器开展强制对流瞬态模拟的OpenFoam文件与配套脚本。