The Cellular Potts Model (CPM) successfully simulates drainage and shear in foams. Here we use the CPM to investigate instabilities due to the flow of a single large bubble in a dry, monodisperse two-dimensional flowing foam. As in experiments in a Hele-Shaw cell, above a threshold velocity the large bubble moves faster than the mean flow. Our simulations reproduce analytical and experimental predictions for the velocity threshold and the relative velocity of the large bubble, demonstrating the utility of the CPM in foam rheology studies.

中文翻译：

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流动泡沫中的粘性不稳定性：细胞 Potts 模型方法

Cellular Potts 模型 (CPM) 成功模拟了泡沫中的排水和剪切。在这里，我们使用 CPM 来研究由于单个大气泡在干燥的单分散二维流动泡沫中流动而导致的不稳定性。正如在 Hele-Shaw 单元中的实验一样，高于阈值速度时，大气泡的移动速度比平均流量快。我们的模拟再现了大气泡速度阈值和相对速度的分析和实验预测，证明了 CPM 在泡沫流变学研究中的实用性。