首页> 外文期刊>Computers & mathematics with applications >Evaluation of the finite element lattice Boltzmann method for binary fluid flows
【24h】

Evaluation of the finite element lattice Boltzmann method for binary fluid flows

机译:二元流体流动的有限元格子玻尔兹曼方法的评估

获取原文
获取原文并翻译 | 示例

摘要

In contrast to the commonly used lattice Boltzmann method, off-lattice Boltzmann methods decouple the velocity discretization from the underlying spatial grid thereby potentially increasing the geometric flexibility of the method. The current work combines characteristic-based integration of the streaming step with the free-energy based multiphase model by Lee and Lin (2005). This allows for simulation time steps more than an order of magnitude larger than the relaxation time. Unlike previous work by Wardle and Lee (2013) that integrated intermolecular forcing terms in the advection term, the current scheme applies collision and forcing terms locally for a simpler finite element formulation. A series of thorough benchmark studies reveal that this does not compromise stability and that the scheme is able to accurately simulate flows at large density and viscosity contrasts. (C) 2017 Elsevier Ltd. All rights reserved.
机译:与通常使用的格子Boltzmann方法相反,非格子Boltzmann方法将速度离散与底层空间网格解耦,从而潜在地增加了该方法的几何灵活性。目前的工作将流步骤的基于特征的集成与Lee and Lin(2005)的基于自由能的多相模型相结合。这允许模拟时间步长比弛豫时间大一个数量级。与Wardle和Lee(2013)先前的研究将分子间强迫项整合到对流项中不同,当前方案在局部应用碰撞和强迫项,以简化有限元公式。一系列详尽的基准研究表明,这不会损害稳定性,并且该方案能够在较大的密度和粘度对比下准确模拟流量。 (C)2017 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号