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Numerical investigation of unsteady particle deposition in a realistic human nasal cavity during inhalation

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Abstract

It is important to understand the patterns of two-phase flow in human nasal cavity in exploring the nasal pathology knowledge. In this paper, a realistic human nasal cavity geometry obtained from CT scans was applied to investigate the unsteady particle deposition during inhalation. The transient airflow pattern in the nasal cavity was investigated through imposing two sine wave curves at inlet with the tidal volume of 159 and 318 mL. The time-varying particle deposition pattern in the nasal cavity and a comparison of deposition characteristic between steady and unsteady inhalation were studied using the Lagrangian approach. By releasing particles continuously during inhalation, it was found that the highest transient deposition appeared about 1.4 s and the particle deposition at different time intervals was strongly depended on the instantaneous inlet flow rate. The total deposition of micro particles ranging from 1 to 20 μm under unsteady inhalation was almost the same as that at steady state when the volume of inhaled airflow was equivalent. The deposition in the anterior region of the nasal cavity was overestimated at steady state for ignoring the gravity effects at the beginning and ending of unsteady inhalation. T he results of this paper can be used for both toxicological and therapeutic applications.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (No. 51676146), for which the authors are thankful.

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Authors and Affiliations

  1. School of Energy and Power Engineering, Xi’an Jiaotong University, 28 Xianning Rd, Xi’an, 710049, China

    Xin Gu & Jian Wen

  2. School of Energy and Building Environment Engineering, Henan University of Urban Construction, Henan, 46700, China

    Mengmeng Wang

  3. School of Chemical Engineering and Technology, Xi’an Jiaotong University, 28 Xianning Rd, Xi’an, 710049, China

    Guanping Jian & Simin Wang

  4. Second Affiliated Hospital of Xi’an Jiaotong University (Xibei Hospital), Xi’an Jiaotong University, 28 Xianning Rd, Xi’an, 710049, China

    Guoxi Zheng

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  1. Xin Gu
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  2. Jian Wen
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  3. Mengmeng Wang
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  4. Guanping Jian
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  5. Guoxi Zheng
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  6. Simin Wang
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Correspondence to Simin Wang.

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Gu, X., Wen, J., Wang, M. et al. Numerical investigation of unsteady particle deposition in a realistic human nasal cavity during inhalation. Exp. Comput. Multiph. Flow 1, 39–50 (2019). https://doi.org/10.1007/s42757-019-0007-0

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  • DOI: https://doi.org/10.1007/s42757-019-0007-0

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