Computational Fluid Dynamics Simulations of Chimpanzee Nasal Airflow for Different Respiratory Modes

Computational Fluid Dynamics Simulations of Chimpanzee Nasal Airflow for Different Respiratory Modes

Kaouthar Samarat1*, Sho Hanida2, Shigeru Ishikawa3, Kazunori Kotani4, Teruo Matsuzawa4

1Ishikawa Resin Industry Co., Ltd., Ta 1-8 Utani, Kaga-shi, Ishikawa 922-0312, Japan; 2Kanazawa Institute of Technology, 7-1 Ohgigaoka, Nonoichi-shi, Ishikawa 921- 8501, Japan; 3Kanazawa Municipal Hospital, 3-7-3 Heiwamachi, Kanazawa-shi, Ishikawa 921-8105, Japan; 4Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi-shi, Ishikawa 923-1292, Japan

International Journal of Bioscience and Medicine

In this study, we investigated the airflow and air-conditioning within an anatomically accurate computer model of the nasal airways belonging to a healthy adult chimpanzee. The finite volumes method was used to compute unsteady turbulent flows with physiological flow rates of 2.2 sin (2πt/3.4) [m/s], 1.8 sin (2πt/1.6) [m/s], and 4.4 sin (2πt/1.4) [m/s], mimicking breathing at rest state, shallow breathing under light stress, and a sniffing phase, respectively. Turbulent k-omega model was used to simulate unsteady respiratory phases whereas the turbulent k-epsilon model was used to simulate the sniffing phase. Simulation results argued that assuming a steady laminar inhalation state to investigate the air-conditioning performance within chimpanzee nasal cavity may be exaggerated. The outcomes of this study might potentially contribute in accumulating standardized biological information on healthy chimpanzee, and so increasing the ability to care for it as an endangered species.

Keywords: Chimpanzee nasal computer model, Chimpanzee nasal airflow, Computational fluid dynamics, Different breathing modes, Nasal air-conditioning, Turbulent unsteady flow

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How to cite this article:
Kaouthar Samarat, Sho Hanida, Shigeru Ishikawa, Kazunori Kotani, Teruo Matsuzawa. Computational Fluid Dynamics Simulations of Chimpanzee Nasal Airflow for Different Respiratory Modes. International Journal of Bioscience and Medicine, 2018; 2:8. DOI: 10.28933/ijbm-2018-06-2001.

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