Phase field data generated from coupled Lattice Boltzmann-discrete element simulations

The Lattice Boltzmann method (LBM) is a direct numerical simulation approach that approximates the Navier-Stokes equations at the mesoscopic scale. Therefore, LBM handles fluid-solid interaction at the boundaries quite efficiently on a regular grid. Coupled with the discrete element method that solves the equation of motion for the particles, the method is well suited to study fluid in porous media (e.g., sand, rock and other granular materials). Incorporating another fluid or gas phase into this high-fidelity LBM-DEM model is trivial with the so-called Shan-Chen model. <br> The data shared here is a sample of numerical data generated from the LBM-DEM simulation of water-air mixture in the soil (i.e., unsaturated soil). The model is implemented using the code LB3D, developed at Forschungszentrum Jülich GmbH, Helmholtz-Institut Erlangen–Nürnberg for Renewable Energy, Nürnberg, Germany. What you will find in this shared dataset is the steady-state phase field that separate the water and air in the pore space. The complete evolution of the phase fields are not shared since it can be easily several TBs. Visualization of this dataset can be done with Paraview or any other post-processing tools that can handle HDF5 files. <br> This dataset is a sample of the preliminary result of the PhD work of Sherrin Joseph, as a demonstration of the open-science activities in the Chair of Soil Micro Mechanics of the University of Twente.格点玻尔兹曼方法（Lattice Boltzmann method, LBM）是一类直接数值模拟方法，可在介观尺度下近似求解纳维-斯托克斯方程。因此，该方法能够在规则网格上高效处理边界处的流固耦合问题。结合用于求解颗粒运动方程的离散元法（discrete element method, DEM），LBM-DEM耦合模型非常适合用于多孔介质（如砂土、岩石及其他颗粒材料）内的流体运动研究。借助所谓的Shan-Chen模型，向该高精度耦合模型中引入另一流体或气相的操作十分简便。 本次共享的数据集为土壤（即非饱和土）中气水两相流的LBM-DEM模拟生成的数值样本数据。该模型采用德国于利希研究中心有限公司（Forschungszentrum Jülich GmbH）、埃尔朗根-纽伦堡亥姆霍兹可再生能源研究所开发的LB3D代码实现。本数据集包含孔隙空间中分隔水相与气相的稳态相场数据。由于完整的相场演化数据体量可达数TB级别，因此未共享全部演化序列。该数据集可通过Paraview或其他支持HDF5格式文件的后处理工具进行可视化。 本数据集为Sherrin Joseph博士学位论文初步研究成果的样本，用于展示特文特大学（University of Twente）土壤微力学教研室的开放科学实践活动。