Microconfined High-Pressure Transcritical Channel Flow Dataset

First comprehensive, open-source dataset carefully curated and structured for studying microconfined high-pressure transcritical fluid channel flows under various regimes. In particular, the dataset contains 18 direct numerical simulations of carbon dioxide at different bulk pressure and velocities confined between differentially-heated walls. For all cases, the thermodynamic conditions selected impose the fluid to undergo a transcritical trajectory across the pseudo-boiling region. The data collection comprises an array of physical quantities that enable comprehensive parametric analyses spanning laminar, transitional, and turbulent flow regimes. This data repository is poised to provide access to the detailed study and modeling of the complex physics observed in high-pressure transcritical fluid environments, especially those closely linked to improving microfluidics performance.The data is structured in a manner where individual cases are allocated in dedicated folders, facilitating in this way convenient access and data processing. Each case folder is structured in different FTT subfolders, which contain 10 snapshot files of the corresponding FTT uniformly spaced in time. Additionally, there is a README.txt file in each case folder that provides essential information about the individual case, such as (i) key independent parameters, (ii) dimensionless numbers, (iii) details on the calculation of the stretching factor in the y-direction, and (iv) the time advancement technique. The dataset files within the FTT subfolders are stored in the Hierarchical Data Format version 5 (h5), an open-source file format capable of handling complex and diverse data. There is also an associated xdmf file that contains data descriptions for these files, which can be visualized with, for example, the open-source software Paraview. Moreover, each case folder also includes a configuration file and a substances library file in YAML format. Likewise, there are C++ files in both .cpp and .hpp formats, allowing users to replicate the simulations for further investigation and/or verification. Finally, a post-processing script is supplied with the dataset, specifically designed to streamline the presentation of primary variables while concurrently computing derived quantities.本数据集为首个针对多工况下微受限高压跨临界流体管内流动开展研究的系统性开源数据集，经精心遴选与结构化整理而成。具体而言，本数据集包含18组二氧化碳(Carbon Dioxide)的直接数值模拟(Direct Numerical Simulation, DNS)结果，对应不同来流压力与流速，且流体被约束于温差加热的壁面之间。所有模拟工况的热力学条件均设置为使流体经历跨越拟沸腾区的跨临界热力学路径。本次数据集涵盖多类物理量，可支撑涵盖层流、转捩及湍流流动工况的全维度参数化分析。 本数据集库将为高压跨临界流体环境中观测到的复杂物理现象的精细化研究与建模提供支撑，尤其有助于优化微流控(Microfluidics)系统的性能。数据集采用结构化存储方式：所有独立工况均存放于专属文件夹中，便于便捷获取与数据处理。每个工况文件夹下设多个FTT子文件夹，每个子文件夹内存储对应工况下按时间均匀分布的10份快照文件。此外，每个工况文件夹中均包含一个README.txt文件，用于提供该独立工况的关键信息，包括：(i) 核心独立参数；(ii) 无量纲数；(iii) y方向拉伸因子的计算细节；(iv) 时间推进技术。FTT子文件夹内的数据集文件以层次数据格式第5版(Hierarchical Data Format version 5, h5)存储，该开源文件格式可高效处理复杂多样的数据集。此外，还配套有xdmf格式文件，用于描述上述数据集文件的相关信息，可借助开源可视化软件ParaView(Paraview)完成可视化。每个工况文件夹还包含一份配置文件与一份YAML(YAML Ain't Markup Language)格式的物质库文件。同时，数据集还提供了格式分别为.cpp与.hpp的C++文件，方便用户复现模拟过程，以开展进一步研究或验证工作。最后，本数据集配套提供后处理脚本，可优化核心变量的展示形式，并同步计算衍生物理量。