Updated on 2026/07/24

写真a

 
OKAZE TSUBASA
 
Organization
School of Environment and Society Associate Professor
Title
Associate Professor
External link

Degree

  • Ph.D. (Eng.) ( 2012.3   Tohoku University )

Research Interests

  • 風工学

  • 雪工学

Professional Memberships

Committee Memberships

  • Scientific Reports   Editorial Board Members  

    2025.4   

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  • 日本建築学会   気候変動による災害防止に関する特別調査委員会  

    2014.4 - 2016.3   

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    Committee type:Academic society

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  • 日本雪工学会   編集委員会 幹事  

    2010.7 - 2016.6   

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    Committee type:Academic society

    日本雪工学会誌 編集委員会

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  • CASBEE 研究開発委員会   ヒートアイランド検討小委員会 幹事  

    2009   

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    Committee type:Academic society

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Papers

  • Comprehensive Experimental Database for Validating CFD Simulations in Urban Wind Environment: Benchmark Cases Curated by the Architectural Institute of Japan Reviewed International journal

    Hideki Kikumoto, Tsubasa Okaze, Ryuichiro Yoshie, Takumi Tachibana, Takeshi Ishihara, Yoshitami Nonomura, Nobuyoshi Kiyota, Hiroaki Kondo, Akashi Mochida, Yoshihide Tominaga

    JAPAN ARCHITECTURAL REVIEW   9 ( 1 )   2026.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    ABSTRACT

    Reliable validation data are essential for ensuring the accuracy and applicability of computational fluid dynamics (CFD) simulations used to analyze urban wind environments. This data paper presents a comprehensive experimental database curated by a working group of the Architectural Institute of Japan (AIJ) to support CFD validation. The database includes 13 benchmark cases, ranging from simplified building geometries to complex urban configurations, with measurements of wind velocity, turbulence, pollutant (tracer) concentration, and temperature under various flow and thermal conditions. The experimental data were compiled from both existing and newly conducted wind‐tunnel and field measurements, collected through collaborations among universities, research institutes, and industry. These cases provide a standardized and versatile basis for evaluating CFD model performance, facilitating uncertainty assessment, inter‐model comparison, and best‐practice development. Each case includes detailed information on experimental setups and measurement techniques to aid reproducibility and application. All datasets are publicly available through open data repositories and have already been widely used in numerous validation studies worldwide. This data paper aims to encourage continued use and broader dissemination of these benchmark cases, thereby enhancing the reliability and credibility of CFD predictions in urban wind and pollutant dispersion analyses.

    DOI: 10.1002/2475-8876.70083

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2475-8876.70083

  • AIJ guidelines on the applications of large-eddy simulation to pedestrian wind environment: Recommendations and validation benchmarks Reviewed International journal

    Tsubasa Okaze, Hideki Kikumoto, Naoki Ikegaya, Keisuke Nakao, Hiroki Ono, Keigo Nakajima, Masashi Imano, Takamasa Hasama, Yuichi Tabata, Takeshi Kishida, Ryuichiro Yoshie, Yoshihide Tominaga

    Journal of Wind Engineering and Industrial Aerodynamics   269   106321 - 106321   2026.2

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jweia.2025.106321

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  • Data-driven accuracy enhancement of cup anemometers in urban pedestrian-level wind measurements combining large-eddy simulation database Reviewed

    Rongmao Li, Hongyuan Jia, Chaoyi Hu, Xiang Wang, Tsubasa Okaze, Hideki Kikumoto

    Building and Environment   2025.9

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.buildenv.2025.113417

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  • Turbulent characteristics in the atmospheric boundary layer under neutral and unstable thermal stratifications based on LES Reviewed International journal

    Yezhan Li, Tsubasa Okaze, Naoki Ikegaya

    Journal of Wind Engineering and Industrial Aerodynamics   263   106126 - 106126   2025.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jweia.2025.106126

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  • COST-BENEFIT ANALYSIS OF HEAT ISLAND MITIGATION STRATEGY (PART 1) : EVALUATION OF HIGH-REFLECTION TREATMENT ON BUILDING ROOF SURFACES IN OSAKA PREFECTURE Reviewed

    Natsu TERUI, Tsubasa OKAZE, Tomohiko IHARA, Daisuke NARUMI

    Journal of Environmental Engineering (Transactions of AIJ)   90 ( 833 )   326 - 337   2025.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    DOI: 10.3130/aije.90.326

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  • Effective grid scale of large-eddy simulations in various advection schemes using airflow around 1:1:2 block model Reviewed International journal

    T. Tong, T. Okaze, N. Ikegaya

    Building and Environment   2025.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.buildenv.2025.113060

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  • Investigating convective heat transfer coefficients of building surfaces under different thermal stratifications with non-isothermal inflow boundary conditions Reviewed International journal

    Yezhan Li, Tsubasa Okaze

    Building and Environment   279   113059 - 113059   2025.7

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.buildenv.2025.113059

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  • パーシステントホモロジーを用いた風の道抽出法の検討 Reviewed

    誉田優太, 藤井隼平, 大風翼

    風工学研究論文集   28   129 - 135   2024.12

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.14887/windengresearch.28.0_129

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  • URANS simulation of pollutant dispersion within a simplified buildings array: influence of k-ε model modification reproducing periodic large-scale fluctuations Reviewed International journal

    Xinyi Li, Tsubasa Okaze

    Wind Engineering Research   28   100 - 109   2024.12

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.14887/windengresearch.28.0_100

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  • 吉川 峻平, 大風 翼, 高野 靖, 西嶋 一欽 Reviewed

    28   48 - 54   2024.12

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  • Statistical analysis of low-occurrence strong wind speeds at the pedestrian level around a simplified building based on the Weibull distribution Reviewed

    Wei Wang, Tsubasa Okaze

    Building and Environment   209   108644 - 108644   2022.2

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    Authorship:Last author   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.buildenv.2021.108644

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  • Large-eddy simulation of flow around an isolated building: A step-by-step analysis of influencing factors on turbulent statistics Reviewed

    Tsubasa Okaze, Hideki Kikumoto, Hiroki Ono, Masashi Imano, Naoki Ikegaya, Takamasa Hasama, Keisuke Nakao, Takeshi Kishida, Yuichi Tabata, Keigo Nakajima, Ryuichiro Yoshie, Yoshihide Tominaga

    Building and Environment   202   108021 - 108021   2021.9

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.buildenv.2021.108021

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  • Comparison of hexahedral, tetrahedral and polyhedral cells for reproducing the wind field around an isolated building by LES Reviewed

    Wei Wang, Yong Cao, Tsubasa Okaze

    Building and Environment   195   107717 - 107717   2021.5

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    Authorship:Last author   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.buildenv.2021.107717

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  • Elucidations of vertical structures of blowing snow with snowfall Reviewed

    MASUZAWA Satoka, OMIYA Satoshi, OKAZE Tsubasa, NIIYA Hirofumi

    Journal of the Japanese Society of Snow and Ice   83 ( 3 )   259 - 273   2021

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    Language:Japanese   Publisher:The Japanese Society of Snow and Ice  

    To elucidate vertical structures of blowing snow with the snowfall, we acquired blowing snow events, which reached equilibrium, from observational data of two months. Estimation of the snowfall frequency in each event was based on snow particle diameters that were greater than 400μm, which were assumed as snowfall particles in this study. Wind profiles were expressed as logarithmic functions of the height; additionally, the roughness length during high snowfall frequency was smaller than during low snowfall frequency at the equivalent friction velocity. The snow-drift flux during low snowfall frequency decreased with increasing height and exhibited uniform distribution at high snowfall frequency. Moreover, the friction velocity dependency of snow-drift flux was confirmed, but the variation was high during high snowfall frequency. The snow-drift flux of during snow particles with less than 200μm diameter decreased with increasing height, whereas that of snowfall particles was vertically uniform. Therefore, the change in the vertical distribution of the snow-drift flux influenced by snowfall frequency was quantitatively explained through the role of snowfall particles to the total snow-drift flux.

    DOI: 10.5331/seppyo.83.3_259

    CiNii Books

    CiNii Research

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    Other Link: http://id.ndl.go.jp/bib/031541430

  • Analysis of strong wind caused by the influence of valley topography by using WRF ~Strong wind case occurred in Teshikaga, Hokkaido, Japan~ Reviewed

    Yuki Ikeda, Satoshi Omiya, Hirofumi Niiya, Tsubasa Okaze

    Wind Engineering Research   26   1 - 8   2020.11

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.14887/windengresearch.26.0_1

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  • Evaluation of exceeding wind speed at a pedestrian level around a 1:1:2 isolated block model Reviewed

    N. Ikegaya, T. Kawaminami, T. Okaze, A. Hagishima

    Journal of Wind Engineering and Industrial Aerodynamics   201   104193 - 104193   2020.6

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jweia.2020.104193

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  • LESによる1:1:2単体建物周辺流れのベンチマークテスト:各種計算条件が計算結果に及ぼす影響 Reviewed

    大風翼, 菊本英紀, 小野浩己, 今野雅, 池谷直樹, 挾間貴雅, 中尾圭佑, 岸田岳士, 田畑侑一, 中島慶悟, 義江龍一郎, 富永禎秀

    日本建築学会技術報告集   26 ( 62 )   179 - 184   2020.2

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.3130/aijt.26.179

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  • DEVELOPMENT OF MICROCLIMATE SIMURATION METHOD COMBINING WRF WITH LES AND FUTURE PREDICTION OF THERMAL ENVIRONMENT IN AN ACTUAL DISTRICT Reviewed

    25   223 - 228   2018.12

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

    DOI: 10.14887/kazekosymp.25.0_223

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  • GENERATION OF ARTIFICIAL INFLOW TURBULENCE WITH DIGITAL FILTER METHOD FOR LES WITHIN BUILT-UP ENVIRONMENT Reviewed

    25   211 - 216   2018.12

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

    DOI: 10.14887/kazekosymp.25.0_211

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  • Wind tunnel experiment and CFD analysis of sand erosion/deposition due to wind around an obstacle Reviewed

    Yoshihide Tominaga, Tsubasa Okaze, Akashi Mochida

    Journal of Wind Engineering and Industrial Aerodynamics   182   262 - 271   2018.11

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jweia.2018.09.008

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  • Cholesky decomposition–based generation of artificial inflow turbulence including scalar fluctuation Reviewed

    T. Okaze, A. Mochida

    Computers & Fluids   159   23 - 32   2017.12

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.compfluid.2017.09.005

    Web of Science

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  • Large-eddy simulation of non-isothermal flow around a building using artificially generated inflow turbulent fluctuations of wind velocity and air temperature Reviewed

    Tsubasa Okaze, Akashi Mochida

    Journal of Heat Island Institute International   12-2 ( 2 )   29 - 34   2017.7

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

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  • Influence of various computational conditions in RANS model on the prediction accuracy of concentration distributions: Benchmark tests for providing guidelines of CFD prediction on pollutant/thermal dispersion in urban areas Reviewed

    Tominaga, Y., Okaze, T., Kikumoto, H., Shirasawa, T., Yoshie, R., Mochida, A.

    AIJ Journal of Technology and Design   22 ( 51 )   609 - 614   2016

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.3130/aijt.22.609

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  • Evaluation of turbulent length scale within urban canopy layer based on LES data Reviewed

    T. Okaze, A. Ono, A. Mochida, Y. Kannuki, S. Watanabe

    Journal of Wind Engineering and Industrial Aerodynamics   144   79 - 83   2015.9

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jweia.2014.11.016

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  • Development of a new k–ε model to reproduce the aerodynamic effects of snow particles on a flow field Reviewed

    T. Okaze, Y. Takano, A. Mochida, Y. Tominaga

    Journal of Wind Engineering and Industrial Aerodynamics   144   118 - 124   2015.9

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jweia.2015.04.016

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  • THE NEAR FUTURE WEATHER DATA FOR BUILDING ENERGY SIMULATION USING DYNAMICAL DOWNSCALING OF RESULTS FROM GLOBAL CLIMATE MODEL Reviewed

    AIJ Journal of Technology and Design   20 ( 46 )   1041 - 1046   2014

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    Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    DOI: 10.3130/aijt.20.1041

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  • Prediction of the impacts of urbanization using a new assessment system combining an urban expansion model and WRF -Case study for Guangzhou in China Reviewed International journal

    Li, Yuan, Okaze, Tsubasa, Mochida, Akashi

    Journal of Heat Island Institute International   9 ( 2 )   133 - 137   2014

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    Publishing type:Research paper (scientific journal)  

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  • PIV measurements of saltating snow particle velocity in a boundary layer developed in a wind tunnel Reviewed

    Yoshihide Tominaga, Tsubasa Okaze, Akashi Mochida, Yasutomo Sasaki, Masaki Nemoto, Takeshi Sato

    Journal of Visualization   16 ( 2 )   95 - 98   2012.12

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  • Wind tunnel investigation of drifting snow development in a boundary layer Reviewed

    Tsubasa Okaze, Akashi Mochida, Yoshihide Tominaga, Masaki Nemoto, Takeshi Sato, Yasutomo Sasaki, Kazusato Ichinohe

    Journal of Wind Engineering and Industrial Aerodynamics   104-106   532 - 539   2012.5

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jweia.2012.04.002

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  • Development of a system for predicting snow distribution in built-up environments: Combining a mesoscale meteorological model and a CFD model Reviewed

    Yoshihide Tominaga, Akashi Mochida, Tsubasa Okaze, Takeshi Sato, Masaki Nemoto, Hiroki Motoyoshi, Sento Nakai, Takuya Tsutsumi, Masaya Otsuki, Takahiko Uamatsu, Hiroshi Yoshino

    Journal of Wind Engineering and Industrial Aerodynamics   99 ( 4 )   460 - 468   2011.4

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jweia.2010.12.004

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  • CFD modeling of snowdrift around a building: An overview of models and evaluation of a new approach Reviewed International journal

    Yoshihide Tominaga, Tsubasa Okaze, Akashi Mochida

    Building and Environment   46 ( 4 )   899 - 910   2011.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.buildenv.2010.10.020

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  • 発達過程の吹雪境界層における飛雪流量の空間分布に関する風洞実験 Reviewed

    伊藤優, 大風翼, 持田灯, 富永禎秀, 根本征樹, 吉野博, 佐藤威

    風工学シンポジウム論文集   20   67 - 72   2008

  • 雪粒子の流れ場への影響を組み込んだ新たな飛雪モデルの提案 Reviewed

    大風翼, 持田灯, 富永禎秀, 吉野博, 伊藤優

    風工学シンポジウム論文集   20   73 - 78   2008

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    Authorship:Lead author, Corresponding author  

    DOI: 10.14887/kazekosymp.20.0.13.0

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  • 砂面上に置かれた物体周りの侵食・堆積に関する風洞実験及びCFD解析 Reviewed

    富永禎秀, 志田貴之, 持田灯, 吉野博, 大風翼

    風工学シンポジウム論文集   19   109 - 114   2006

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MISC

  • 実務で活用するCFDの現状とこれから 第2回 都市街区計画へのCFDの適用 Invited

    大風 翼, 井上宗則, 佃 悠

    建築技術   ( 2015年2月 )   62 - 63   2015

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  • 風による雪の輸送がもたらす環境障害 - 市街地内の吹きだまりの予測 - Invited

    大風翼, 富永禎秀, 持田灯

    日本機械学会誌   116 ( 1136 )   16 - 19   2013

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  • Recent Progress in CFD Applications to Snowdrift around Buildings Invited

    TOMINAGA Yoshihide, OKAZE Tsubasa, MOCHIDA Akashi

    Journal of Wind Engineering   37 ( 1 )   42 - 50   2012

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    Language:Japanese   Publisher:Japan Association for Wind Engineering  

    DOI: 10.5359/jawe.37.42

    CiNii Books

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    Other Link: https://jlc.jst.go.jp/DN/JALC/10009195294?from=CiNii

  • 都市レベルの数値解析 Invited

    大風翼, 持田灯

    建築技術   ( 2012年12月 )   2012

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  • 建物周辺の飛雪現象へのCFDの適用 Invited

    富永禎秀, 大風翼, 持田灯

    日本流体力学会誌「ながれ」   28 ( 6 )   477 - 484   2009

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Awards

  • 日本風工学会 研究奨励賞

    2015  

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  • 日本建築学会奨励賞

    2015  

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  • 日本雪工学会 学術奨励賞

    2013  

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    Country:Japan

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  • 風工学シンポジウム論文賞

    2013  

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    Country:Japan

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  • 日本風工学会ベストペーパー賞

    2012  

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    Country:Japan

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  • 雪氷研究大会(2010・仙台) 学生奨励賞

    2010  

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    Country:Japan

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  • 空気調和衛生工学会振興賞・学生賞

    2006  

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    Country:Japan

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