Particulate air pollution has an adverse effect on cardiovascular and respiratory health. Air filtration systems are therefore essential in closed indoor environments. While mechanical filtration is described as an efficient technology, particle filters may act as a source of pollution if not correctly installed and frequently maintained. The sandfish lizard, a sand swimmer that spends nearly its whole life in fine desert sand, inspired us to rethink traditional filtering systems due to its unique ability of filtering sand from its nasal cavity. During a slow, prolonged inhalation, strong cross-flow velocities develop in a certain region of the upper respiratory tract; these cross-flows enhance gravitational settling and force inhaled sand grains towards the wall where they adhere to mucus, which covers the walls in this region. During an intense, cough-like exhalation the particles are blasted out. In this work, the sandfish’s aerodynamic filtering system was analyzed experimen...

中文翻译：

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沙鱼蜥蜴的空气动力学过滤系统。

空气中的微粒污染会对心血管和呼吸系统健康产生不利影响。因此，空气过滤系统在封闭的室内环境中必不可少。虽然机械过滤被描述为一种有效的技术，但如果未正确安装和经常维护，颗粒过滤器可能会成为污染源。沙鱼蜥蜴是一种游泳者，几乎将一生都花在细沙上，这使我们重新思考传统的过滤系统，因为它具有从鼻腔中过滤沙的独特能力。在缓慢，长时间的吸入过程中，上呼吸道的某些区域形成强大的横流速度。这些横流增强了重力沉降，并将吸入的沙粒压向粘附在粘液上的壁，该粘液覆盖了该区域的壁。在激烈的比赛中 咳嗽般的呼气将颗粒炸掉。在这项工作中，对沙鱼的空气动力过滤系统进行了实验分析。