论文标题
二进制混合物与自由能晶格玻尔兹曼方法
Binary mixture flow with free energy lattice Boltzmann methods
论文作者
论文摘要
我们使用自由能晶格玻尔兹曼方法（FRE LBM）来模拟两个和三个维度的二元混合物的剪切和延伸流。为此，两种经典配置是数字化的，即用于二进制剪切流的平行带设备，以及用于二元扩展流动的四旋转器设备。 FRE LBM和测试用例是在开源C ++框架OpenLB中实现的，并评估了几个非二维数字。捕获了特征变形，其中发生了关键毛细管状态的分解机制。尽管观察到了已知的小滴域比率的质量泄漏，但合适的网格尺寸与分析预测和参考结果表现出了很好的一致性。
We use free energy lattice Boltzmann methods (FRE LBM) to simulate shear and extensional flow of a binary mixture in two and three dimensions. To this end, two classical configurations are digitally twinned, namely a parallel-band device for binary shear flow and a four-roller apparatus for binary extensional flow. The FRE LBM and the test cases are implemented in the open-source C++ framework OpenLB and evaluated for several non-dimensional numbers. Characteristic deformations are captured, where breakup mechanisms occur for critical capillary regimes. Though the known mass leakage for small droplet-domain ratios is observed, suitable mesh sizes show good agreement to analytical predictions and reference results.
