平面设置格子博尔兹曼方法用于界面解析模拟不可混合的双相流量
Shaotong Fu1, Zikang Hao1, Weite Su1
1State Key Laboratory of Mesoscience and Engineering, <a href="https://ror.org/03j4x9j18">Institute of Process Engineering</a>, Chinese Academy of Sciences, Beijing 100190, China School of Chemical Engineering, <a href="https://ror.org/05qbk4x57">University of Chinese Academy of Sciences</a>, Beijing 100049, China.
一个新的格子博尔茨曼 (LB) 方案用于等级式方程,准确模拟了两相流. 这种方法提高了复杂流体动态的接口精度和计算效率.
科学领域:
- 计算流体动力学的流体动力学.
- 多相流量模拟多相流量模拟
- 数学方法 数学方法
背景情况:
- 模拟不可混合的两相流在各种工程应用中至关重要.
- 传统的水平设置方法通常需要解决额外的部分微分方程来重新初始化.
- 现有的相场格子博尔兹曼方法可以在捕获接口动态时显示错误.
研究的目的:
- 开发一种新的格子博尔兹曼 (LB) 方案,用于等级式方程,以模拟不可混合的两相流.
- 为了提高在流体模拟中接口捕获的准确性和效率.
- 为了验证拟议的方法与基准的两相流量问题.
主要方法:
- 提出了一个对不压缩流体的合LB模型和一个水平设置方程.
- 水平设置字段的重新初始化直接通过LB方程中的源项实现,避免额外的PDEs.
- 图形处理单元 (GPU) 平行计算是为水平设置格子博尔兹曼法 (LS-LBM) 实现的.
主要成果:
- 与经典方法相比,LS-LBM在接口运动和变形中的错误显著减少.
- 静态滴滴,分层波泽伊流,上升泡和雷利-泰勒不稳定性的模拟显示出良好的稳定性和准确性.
- 该方法实现了高计算效率,特别是在GPU并行化方面.
结论:
- 拟议的LS-LBM是一种稳定,准确和高效的方法,用于模拟不可混合的两相流.
- 它有效地捕捉接口动态,并处理大密度比率和高雷诺兹数.
- 直接重新启动方法简化了模拟过程并提高了性能.
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