• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biomedical Engineering: Applications, Basis and Communications >Computational fluid dynamics study of pull and plug flow boundary condition on nasal airflow
【24h】

Computational fluid dynamics study of pull and plug flow boundary condition on nasal airflow

机译：拉流和塞流边界条件对鼻气流的计算流体动力学研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The recent advances in the computer based computational fluid dynamics (CFD) software tools in the study of airflow behavior in the nasal cavity have opened an entirely new field of medical research. This numerical modeling method has provided both engineers and medical specialists with a clearer understanding of the physics associated with the flow in the complicated nasal domain. The outcome of any CFD investigation depends on the appropriateness of the boundary conditions applied. Most researchers have employed plug boundary condition as against the pull flow which closely resembles the physiological phenomenon associated with the breathing mechanism. A comparative study on the effect of using the plug and pull flow boundary conditions are evaluated and their effect on the nasal flow are studied. Discretization error estimation using Richardson's extrapolation (RE) method has also been carried out. The study is based on the numerical model obtained from computed tomographic data of a healthy Malaysian subject. A steady state Reynold averaged Navier-Stokes and continuity equations is solved for inspiratory flow having flow rate 20 L/min representing turbulent boundary conditions. Comparative study is made between the pull and plug flow model. Variation in flow patterns and flow features such as resistance, pressure and velocity are presented. At the nasal valve, the resistance for plug flow is 0.664 Pa-min/L and for pull flow the value is 0.304 Pa-min/L. The maximum velocity at the nasal valve is 3.28 m/s for plug flow and 3.57 m/s for pull flow model.
机译：基于计算机的计算流体动力学（CFD）软件工具在鼻腔气流行为研究中的最新进展开辟了医学研究的全新领域。这种数值建模方法为工程师和医学专家提供了对与复杂鼻腔内血流相关的物理学的更清晰的理解。 CFD调查的结果取决于所应用边界条件的适当性。大多数研究人员已经采用了塞子边界条件来抵抗拉流，该拉流与呼吸机制相关的生理现象极为相似。对使用塞流和拉流边界条件的效果进行了比较研究，并研究了它们对鼻流的影响。还已经进行了使用理查森外推（RE）方法的离散化误差估计。该研究基于从健康马来西亚受试者的X线断层扫描数据中获得的数值模型。对于流速为20 L / min的湍流边界条件的吸气流，求解了稳态的雷诺平均Navier-Stokes和连续性方程。在拉力和塞流模型之间进行了比较研究。提出了流动模式和流动特征（例如阻力，压力和速度）的变化。在鼻阀处，塞流阻力为0.664 Pa-min / L，拉流阻力为0.304 Pa-min / L。对于塞流，鼻阀处的最大速度为3.28 m / s，对于拉流模型，其最大速度为3.57 m / s。

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