Pore-throat characterization of unconsolidated porous media using watershed-segmentation algorithm
Pore-throat characterization of unconsolidated porous media using watershed-segmentation algorithm
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DOI：
10.1016/j.powtec.2019.12.026
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发表时间：
2020-02
影响因子：
5.2
通讯作者：
Anindityo Patmonoaji;Kento Tsuji;T. Suekane
中科院分区：
文献类型：
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作者：
Anindityo Patmonoaji;Kento Tsuji;T. Suekane
多孔介质的孔喉特性在各种渗流过程中起着重要的作用。然而，各种多孔介质的孔径分布（PSD）和喉道尺寸分布（TSD）的报道很少。分水岭分割是一种很有前途的孔喉识别方法。为了避免过度分割和欠分割，设计了一种试错法，并使用人工排序包装进行验证。然后，我们分析了具有各种特性的多孔介质，并与人工有序填料进行了比较。更多的角颗粒产生更大的孔隙和喉道。球形颗粒的TSD是双峰的，而其他颗粒类似于正态分布。孔表面积与孔体积的关系呈现分形特征。与中轴法相比，WS法的PSD和TSD较大，但分布趋势相似。用中值孔径归一化PSD得到单一高斯模型，证明可能的PSD模型。然而，对TSD数据的归一化不会产生单个高斯模型。
Pore-throat characteristics of porous media play important roles in various flow processes. However, pore size distribution (PSD) and throat size distribution (TSD) of various porous media have rarely been reported. Watershed-segmentation (WS) is a promising pore-throat identification method. To avoid over- and under-segmentations, a trial-and-error method was devised and validated using artificially ordered packings. Afterwards, we analyzed porous media with various characteristics, and comparisons with artificially ordered packing were made. More angular particles generated larger pores and throats. TSD of spherical particles was bimodal, whereas other particles resembled a normal distribution. Pore surface area and volume relation demonstrated a fractal behavior. Compared with medial axis (MA) method, PSD and TSD from WS method were larger but exhibited similar distribution trends. Normalizing the PSD with the median pore size yielded a single Gaussian model, demonstrating a possible PSD model. However, normalization to TSD data does not produce a single Gaussian model.