Videos (high speed camera) - liquid-solid fluidisation experiments (calcite-pellets 1.4-1.7 mm in water)

11 high speed camera videos of liquid-solid fluidisation experiments in a university laboratory. You see a 57 mm PVC column where tap water is pumped in an upward direction causing particles to elevate into a fluidised state. Particles are (calcium carbonate) calcite grains obtained from a full-scale drinking water softening reactor. The reason to show this video is to demonstrate that homogenous flow regime not always occurs whilst this is often assumed regarding l-s fluidisation systems. The viewer can observe open voids of water between the particles and water which choses a path of least resistance through the particle bed. Besides laminar-turbulent regime also homogenous-heterogeneous distinction is relevant. The videos can be used for analysis purposes e.g. ImageJ particle tracking. More info: reference: https://doi.org/10.1016/j.ijmultiphaseflow.2020.103261 And related videos: https://data.4tu.nl/repository/uuid:1b685d9e-4441-4a53-865c-86622ba49b25本数据集包含11段大学实验室开展的液固流化实验高速摄像视频。实验装置为内径57 mm的聚氯乙烯（PVC）柱体，通过向上泵送自来水使柱内颗粒被扬起并呈现流化状态。实验所用颗粒为取自规模化饮用水软化反应器的碳酸钙方解石颗粒。本数据集旨在说明：尽管液固流化系统常被默认存在均匀流态，但实际并非总能观测到该流型。观者可观测到颗粒间存在的开放式水流空隙，水流会沿颗粒床内阻力最小的路径流动。除层流-湍流流型外，均匀-非均匀流型的区分同样具有重要研究价值。本系列视频可用于图像分析相关研究，例如借助ImageJ软件开展颗粒追踪。更多信息可参考：文献DOI：https://doi.org/10.1016/j.ijmultiphaseflow.2020.103261；相关视频数据集：https://data.4tu.nl/repository/uuid:1b685d9e-4441-4a53-865c-86622ba49b25