Parallel dilute particulate flow simulations in the human nasal cavity
Parallel dilute particulate flow simulations in the human nasal cavity
复制标题
人体鼻腔中的并行稀颗粒流模拟
DOI：
10.1016/j.compfluid.2015.08.002
复制
发表时间：
2016
影响因子：
2.8
通讯作者：
M. Krause
中科院分区：
文献类型：
--
作者：
T. Henn;G. Thäter;W. Dörfler;H. Nirschl;M. Krause
当模拟时变颗粒流时，人们面临的困境是用于流体模拟的区域分解对于颗粒轨迹的并行计算不是最佳的。因此，本文提出并比较了两种并行化策略的粒子相的基础上使用的开源格子玻尔兹曼框架OpenLB（http：//www.example.com）中的固定区域分解方法。www.openlb.net在颗粒均匀分布的情况下，该优化策略更有效。收敛性研究和性能测试进行了简化的几何形状的人的肺，并显示出良好的并行加速比。所实施的策略用于模拟包括鼻旁窦的人类鼻腔的患者特定几何形状中的微粒的时间依赖性微粒流。稀释的均匀分布的颗粒在吸气开始时释放一次，以及在整个吸气周期中重复释放，这导致更均匀的分布。研究发现，不同的注入方法的沉积速率不同。
When simulating time-dependent particulate flows, one faces the dilemma that the domain decomposition used for fluid simulation is not optimal for parallel computation of particle trajectories. Therefore, the article proposes and compares two parallelization strategies for the particle phase based on the fixed domain decomposition approach used in the open source lattice Boltzmann framework OpenLB (http://www.openlb.net). Thecommunication optimalstrategy is found to be more efficient in the case of homogeneously distributed particles. Convergence studies and performance tests are conducted using a simplified geometry of the human lungs and show excellent parallel speedup. The implemented strategy is used to simulate time-dependent particulate flows of micro-particles in a patient-specific geometry of a human nasal cavity including paranasal sinuses. Dilute, uniformly distributed particles are released once at the start of inspiration, as well as repeatedly during the entire inspiratory cycle, which leads to a more homogeneous distribution. It is found that the deposition rates vary for the different injection methods.