Voxel-based Simulation of Nasal Airflow during a Sniff
Voxel-based Simulation of Nasal Airflow during a Sniff
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基于体素的吸气过程中鼻气流模拟
DOI：
10.11239/jsmbe.56.37
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发表时间：
2018
影响因子：
--
通讯作者：
田中 学
中科院分区：
文献类型：
--
作者：
木村 真也;木村 祐介;世良 俊博;小野 謙二;田中 学
为了建立一种新的简化方法来量化手术干预对鼻腔气流的影响，我们使用了基于体素的计算流体动力学模拟来分析模拟嗅觉的非稳定流动条件下的鼻腔气流，其中包括短暂的吸气和快速的加速。为了验证该体素方法与传统边界拟合法的计算结果的一致性，研究了日冕截面上流量的时间-瞬变分布。尽管使用粗体素网格的方法很简单，但体素方法准确地再现了嗅觉过程中流量分布的快速变化。我们还发现，正确地模拟鼻腔内特征流动结构的快速变化(包括鼻瓣后面的射流和腔的前部上部的循环流动)对于再现嗅觉过程中的非稳定流动分布是重要的。因此，基于体素的模拟可以用来评估非定常鼻腔气流的动力学。
To establish a new simplified approach to quantify the impact of surgical intervention on nasal airflow, we used voxel-based computational fluid dynamics simulations to analyze nasal airflow under unsteady flow conditions mimicking a sniff, which involves brief inhalation accompanied by rapid acceleration. The time-transient distribution of the flow rate in the coronal cross-section was investigated to validate the results of this voxel method against those of conventional boundary-fitted method. Despite a simple approach using coarse voxel grids, the voxel method accurately reproduced rapid changes in flow distribution during a sniff. We also found that correctly modeling rapid changes in the characteristic flow structure in a nasal cavity (including a jet posterior to the nasal valve and a recirculating flow in the upper anterior region of the cavity) is important for reproducing the unsteady flow distribution during a sniff. Thus, the voxel-based simulations can be used to assess the dynamics of unsteady nasal airflows.