Volume pixel modeling of nasal air conditioning function based on medical images

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K03970
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 19020:Thermal engineering-related
• Research Institution: Chiba University
• Principal Investigator: Tanaka Gaku 千葉大学, 大学院工学研究院, 教授 (20292667)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: 熱工学 / 生体熱工学 / 熱・物質移動

Outline of Final Research Achievements

This work describes a new approach to simulate the airflow and air-conditioning in the human nasal cavity using voxel-based modeling. Voxel-based simulation of steady and unsteady flow was performed to resolve the flow and temperature fields. The results were verified by comparison with the experiments. It was found that this method enables high-speed and stable grid generation for complicated shapes of the nasal cavity and is useful for analysis of transitional flow and various functions in the nasal cavity.

Free Research Field

機械工学

Academic Significance and Societal Importance of the Research Achievements

本手法の優れた並列化効率を活かして，格子を渦の最小スケールまで細分化した直接数値計算（DNS）を実施し，鼻腔内に生じる流れの不安定性を調査した．その結果，鼻腔狭窄部下流に発生するジェットと再循環流の間に形成されるせん断層においてケルビンヘルムホルツ不安定流れが形成されることを確認した．また，乱れのパワースペクトルは比較的低いレイノルズ数においても乱流に近い特徴を示すことを明らかにした．