Morphology of Pig Nasal Structure and Modulation of Airflow and Basic Thermal Conditioning

Jisoo Yuk, Mohammad Mehedi Hasan Akash, Aneek Chakraborty, Saikat Basu, Leonardo P Chamorro, Sunghwan Jung

Research output: Contribution to journalArticlepeer-review


Mammals have presumably evolved to adapt to a diverse range of ambient environmental conditions through the optimized heat and mass exchange. One of the crucial biological structures for survivability is the nose, which efficiently transports and thermally preconditions the external air before reaching the internal body. Nasal mucosa and cavity help warm and humidify the inhaled air quickly. Despite its crucial role, the morphological features of mammal noses and their effect in modulating the momentum of the inhaled air, heat transfer dynamics, and particulate trapping remain poorly understood. Tortuosity of the nasal cavity in high-olfactory mammalian species, such as pigs and opossum, facilitates the formation of complex airflow patterns inside the nasal cavity, which leads to the screening of particulates from the inhaled air. We explored basic nasal features in anatomically realistic nasal pathways, including tortuosity, radius of curvature, and gap thickness; they show strong power-law correlations with body weight. Complementary inspection of tortuosity with idealized conduits reveals that this quantity is central in particle capture efficiency. Mechanistic insights into such nuances can serve as a tipping point to transforming nature-based designs into practical applications. In-depth characterization of the fluid-particle interactions in nasal cavities is necessary to uncover nose mechanistic functionalities. It is instrumental in developing new devices and filters in a number of engineering processes.

Original languageEnglish (US)
Article numbericad005
Pages (from-to)304-314
Number of pages11
JournalIntegrative and comparative biology
Issue number2
Early online dateFeb 2 2023
StatePublished - Aug 1 2023

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Plant Science


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