Transport phenomena in the human nasal cavity: A computational model
Transport phenomena in the human nasal cavity: A computational model
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DOI：
10.1114/1.108
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发表时间：
1998-09-01
影响因子：
3.8
通讯作者：
Elad, D
中科院分区：
文献类型：
--
作者：
Naftali, S;Schroter, RC;Elad, D
鼻吸气对于维持肺的内部环境是重要的，因为环境空气在到达鼻咽时被调节到接近肺泡条件（体温和完全饱和的水蒸气）。我们进行了一个二维的计算研究模型中的正常和患病的人的鼻腔在各种环境条件下的吸气横截面的传输现象。结果表明，在通过正常人的鼻子呼吸期间，有足够的时间进行热和水交换，以使平衡接近肺泡内条件。正常的鼻子可以在极端环境下保持这种平衡（例如，热/潮湿、冷/干燥、冷/潮湿）。鼻甲骨通过缩小空气通道和在鼻甲骨壁下游诱导层流涡流来增加局部热量和水分传输的速率。然而，异常的血液供应或粘液产生可能会降低进入吸入空气的热量或水分通量的速率，从而影响该过程的功效。(C)1998年生物医学工程学会。
Nasal inspiration is important for maintaining the internal milieu of the lung, since ambient air is conditioned to nearly alveolar conditions (body temperature and fully saturated with water vapor) on reaching the nasopharynx. We conducted a two-dimensional computational study of transport phenomena in model transverse cross sections of the nasal cavity of normal and diseased human noses for inspiration under various ambient conditions. The results suggest that during breathing via the normal human nose there is ample time for heat and water exchange to enable equilibration to near intraalveolar conditions. A normal nose can maintain this equilibrium under extreme environments (e.g., hot/humid, cold/dry, cold/humid). The turbinates increase the rate of local heat and moisture transport by narrowing the passageways for air and by induction of laminar swirls downstream of the turbinate wall. However, abnormal blood supply or mucous generation may reduce the rate of heat or moisture flux into the inspired air, and thereby affect the efficacy of the process. (C) 1998 Biomedical Engineering Society.