Turbulent mixing and cloud microphyscial processes by large scale parallel numerical computation

• Project/Area Number: 24360068
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: GOTOH Toshiyuki 名古屋工業大学, 工学(系)研究科(研究院), 教授 (70162154)
• Co-Investigator(Kenkyū-buntansha): WATANABE Takeshi 名古屋工業大学, 大学院工学研究科, 准教授 (30345946) ; MIURA Hideaki 核融合科学研究所, ヘリカル研究部, 准教授 (40280599)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000); Fiscal Year 2014: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2013: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2012: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
• Keywords: 乱流混合 / 雲マイクロ物理 / 大規模計算 / スカラー / 異常揺らぎ / 雲粒子 / 乱流 / スカラー混合輸送 / 大規模並列計算 / スケーリング指数 / 普遍性 / スペクトル / 高シュミット数 / 粒子衝突 / スカラー輸送 / MPI / ハイブリッドコード

Outline of Final Research Achievements

Cloud microphysical simulator has been developed which computes growth of cloud droplets to rain drops udner the action of condensation, collision and turbulent mixing from the view point of the first principle. Evolution of cloud droplets and turbulence inside a parcel which is convected by the updraft has succesfully been computed for 20 minutes. Growth of mean droplet radius and expansion of the droplet spectrum are analized. The scaling exponents of the moments of passive scalar fluctuations in turbulence have been exmained by the large scale computation. It is found that the scaling exponents are not universal but those of the normalized moments are universal. Spectrum of the scalar fluctuations at very high Schmidt number such as aerosols which are essential to nucleation of cloud droplets has been examined. The spectrum is found to agree with the theoretical prediction and the effects of the velocity intermittency on the spectrum in the far diffusive range is also studied.

Research Products

• [Journal Article] Spectrum of Passive Scalar at Very High Schmidt Number in Turbulence (2015)
  • Author(s): T. Gotoh, T. Watanabe, and H. Miura
  • Journal Title: Plasma and Fusion Research Volume: 9 Issue: 0 Pages: 3401019-3401019
  • DOI: 10.1585/pfr.9.3401019
  • NAID: 130005098528
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Power-law spectra formed by stretching polymers in decaying isotropic turbulence (2014)
  • Author(s): Takeshi Watanabe and Toshiyuki Gotoh
  • Journal Title: Phys. Fluids Volume: 26 Issue: 3 Pages: 35110-35110
  • DOI: 10.1063/1.4869102
  • Peer Reviewed / Open Access
• [Journal Article] 乱流の減衰過程に及ぼす高分子の影響 (2014)
  • Author(s): 渡邊威, 後藤俊幸
  • Journal Title: 京都大学数理解析研究所講究録 Volume: 1882 Pages: 55-64
  • Open Access / Acknowledgement Compliant
• [Journal Article] Hybrid Eulerian-Lagrangian simulations for polymer-turbulence interactions (2013)
  • Author(s): Takeshi Watanabe, Toshiyuki Gotoh
  • Journal Title: J. Fluid Mech. Volume: 717 Pages: 535-575
  • DOI: 10.1017/jfm.2012.595
  • Peer Reviewed
• [Presentation] Cloud droplet growth and updraft in cloud microphysics simulator (2015)
  • Author(s): T.Gotoh
  • Organizer: International Workshop on Cloud Turbulence
  • Place of Presentation: Nagoya Institute of Technology
  • Year and Date: 2015-03-04
  • Invited
• [Presentation] 雲マイクロ物理シミュレータによる雲乱流と雲粒子成長の解析 (2014)
  • Author(s): 後藤 俊幸, 市川 智也, 末廣 保
  • Organizer: 日本流体力学会
  • Place of Presentation: タワーホール船堀、東京
  • Year and Date: 2014-12-09
• [Presentation] Intermittency and universality of small scales of passive scalar in turbulence (2014)
  • Author(s): T. Gotoh and T. Watanabe
  • Organizer: APS, 67th Annual Mtg. of the Division of Fluid Dynamics
  • Place of Presentation: San Francisco
  • Year and Date: 2014-11-24
• [Presentation] 雲乱流中の上昇気流と雲粒子の成長について (2014)
  • Author(s): 末廣 保、後藤俊幸、渡邊威
  • Organizer: 日本流体力学会中部支部講演会
  • Place of Presentation: 三重大学
  • Year and Date: 2014-11-07
• [Presentation] 雲乱流中における雲粒子の衝突過程 (2014)
  • Author(s): 市川智也、後藤俊幸、渡邊威
  • Organizer: 日本流体力学会中部支部講演会
  • Place of Presentation: 三重大学
  • Year and Date: 2014-11-07
• [Presentation] 雲マイクロ物理過程における雲乱流と上昇気流 (2014)
  • Author(s): 末廣保、後藤俊幸、渡邊威
  • Organizer: 日本流体力学会年会
  • Place of Presentation: 東北大学
  • Year and Date: 2014-09-16
• [Presentation] 雲乱流中における雲粒子の衝突過程 (2014)
  • Author(s): 市川智也、渡邊威、後藤俊幸
  • Organizer: 日本流体力学会年会
  • Place of Presentation: 東北大学
  • Year and Date: 2014-09-16
• [Presentation] Intermittency and universality of passive scalar fluctuations in turbulence at very high Reynolds number (2014)
  • Author(s): T. Gotoh and T. Watanabe
  • Organizer: Plasma Simulator Symposium
  • Place of Presentation: 核融合科学研究所（岐阜県土岐市）
  • Year and Date: 2014-09-11
  • Invited
• [Presentation] 雲マイクロ物理過程と乱流輸送 (2014)
  • Author(s): 後藤俊幸，市川智也，末廣保
  • Organizer: 日本物理学会
  • Place of Presentation: 中部大学
  • Year and Date: 2014-09-07
• [Presentation] Universality of small scale statistics of passive scalar in turbulence (2014)
  • Author(s): T. Gotoh and T. Watanabe
  • Organizer: Turbulent Mixing and Beyond Workshop
  • Place of Presentation: ICTP,Trieste, Italy
  • Year and Date: 2014-08-04
  • Invited
• [Presentation] 弾性乱流のオイラー・ラグランジュシミュレーション (2014)
  • Author(s): 渡邊威, 後藤俊幸
  • Organizer: 京都大学数理解析研究所研究集会
  • Place of Presentation: 京都大学数理解析研究所
  • Year and Date: 2014-07-14
• [Presentation] 雲マイクロ物理過程と乱流混合輸送との相互作用 (2014)
  • Author(s): 後藤俊幸
  • Organizer: 学際大規模情報基盤共同利用・共同研究拠点第6回シンポジウム
  • Place of Presentation: THE GRAND HALL, Tokyo
  • Year and Date: 2014-07-10
• [Presentation] Elastic Turbulence in Taylor-Green flow (2014)
  • Author(s): T. Gotoh and T. Watanabe
  • Organizer: Conference on Dynamics of Particles in Flows
  • Place of Presentation: NORDITA, Stockholm, Sweden
  • Year and Date: 2014-06-13
  • Invited
• [Presentation] Turbulence and droplets in cloud simulator (2014)
  • Author(s): T. Gotoh, T. Watanabe, Y. Kozaki, Y. Suzuki, and K. Yamamoto
  • Organizer: Conference on Dynamics of Particles in Flows
  • Place of Presentation: NORDITA, Stockholm, Sweden
  • Year and Date: 2014-06-11
  • Invited
• [Presentation] パッシブスカラー乱流の統計理論と普遍性 (2014)
  • Author(s): 後藤 俊幸
  • Organizer: 京大数理研 研究集会「大スケール流体運動と乱流揺らぎ」
  • Place of Presentation: 京都大学数理解析研究所
  • Invited
• [Presentation] Spectrum and intermittency of passive scalar in turbulence (2014)
  • Author(s): T. Gotoh
  • Organizer: 2nd international workshop on Mathematical Theory of Turbulence via Harmonic Analysis and Computational Fluid Dynamics in 2014
  • Place of Presentation: Nara
  • Invited
• [Presentation] Turbulence and cloud droplet interaction (2014)
  • Author(s): T. Gotoh, T. Watanabe, Y. Kozaki, Y. Suzuki, and K. Yamamoto
  • Organizer: Workshop on Fundamental Aspects of Geophysical Turbulence
  • Place of Presentation: Nagoya University
  • Invited
• [Presentation] Taylor-Green流れにおける弾性乱流の性質 (2014)
  • Author(s): 渡邊威、後藤俊幸
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
• [Presentation] 希薄高分子溶液における低レイノルズ数乱流の性質 (2013)
  • Author(s): 渡邊威, 後藤俊幸
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-26
• [Presentation] 乱流の減衰過程に及ぼす高分子の影響 (2013)
  • Author(s): 渡邊威, 後藤俊幸
  • Organizer: 京都大学数理解析研究所研究集会「多重物理・多重スケール乱流現象の数理」
  • Place of Presentation: 京都大学
  • Year and Date: 2013-01-13
• [Presentation] 雲マイクロ物理過程と乱流スカラー輸送の大規模シミュレーション (2013)
  • Author(s): 後藤俊幸、小崎友裕、 渡邊威、 尾形修司、小林亮,、石井克哉、草野完也、坪木和久
  • Organizer: 名古屋大学HPC 計算科学連携研究プロジェクト成果報告シンポジウム
  • Place of Presentation: 名古屋大学
• [Presentation] 雲マイクロ物理過程と乱流混合との相互作用の計算科学的解明 (2013)
  • Author(s): 後藤俊幸、小崎友裕、 渡邊威、 尾形修司、小林亮,、松尾啓、石井克哉、石原卓
  • Organizer: 学際大規模情報基盤共同利用・共同研究拠点 第5回シンポジウム
  • Place of Presentation: THE GRAND HALL、品川
• [Presentation] Taylor-Green 流れにおける弾性乱流 (2013)
  • Author(s): 渡邊威、後藤俊幸
  • Organizer: 日本流体力学会
  • Place of Presentation: 東京農工大学
• [Presentation] パッシヴスカラーの慣性移流領域における普遍性 (2013)
  • Author(s): 後藤俊幸。渡邊威
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学
• [Presentation] Interaction between cloud droplets and decaying turbulence (2013)
  • Author(s): T. Gotoh, T. Watanabe, Y. Kozaki, and Y. Suzuki
  • Organizer: European Turbulence Conference
  • Place of Presentation: Lyon, France
• [Presentation] On the universality of small scale statistics of turbulence and passive scalar (2013)
  • Author(s): T.Gotoh
  • Organizer: Turbulence Colloquium Mediterranea TCM 2013
  • Place of Presentation: Sidi Bou Said, Tunisia
  • Invited
• [Presentation] Numerical study of turbulent mixing in clouds (2013)
  • Author(s): T. Gotoh, T. Watanabe, Y. Kozaki, and Y. Suzuki
  • Organizer: Seminar on Fluid Dynamics at Ilmenau University of Technology
  • Place of Presentation: Ilmenau University of Technology
  • Invited
• [Presentation] 雲マイクロ物理過程と乱流混合との相互作用 (2013)
  • Author(s): 後藤俊幸、渡邊威、小﨑友裕、鈴木祐有紀
  • Organizer: 第７回 NIT-NIFS 共同セミナー
  • Place of Presentation: 名古屋工業大学
• [Presentation] 乱流中における雲粒子の空間分布 (2013)
  • Author(s): 山本一夫、後藤俊幸
  • Organizer: 第２６回計算力学講演会
  • Place of Presentation: 佐賀大学
• [Presentation] 希薄高分子溶液における乱流のハイブリッドシミュレーション (2013)
  • Author(s): 西岡優樹、渡邊威、後藤俊幸
  • Organizer: 第２６回計算力学講演会
  • Place of Presentation: 佐賀大学
• [Presentation] Velocity intermittency and Lagrangian correlation for scalar spectrum at high Schmidt number (2013)
  • Author(s): T. Gotoh and T. Suehiro
  • Organizer: Workshop on Turbulence and Amorphous Materials
  • Place of Presentation: Eilat, Israel
  • Invited
• [Presentation] Statistics and dynamics of scalar at small scales in turbulence (2013)
  • Author(s): T. Gotoh, T. Watanabe, and H. Miura
  • Organizer: The 23rd International Toki Conference on Large-scale Simulation and Fusion Science
  • Place of Presentation: Toki
  • Invited
• [Presentation] 直接数値計算による乱流中の粒子間衝突頻度の解析 (2013)
  • Author(s): 塩津直哉，渡邊 威，後藤 俊幸
  • Organizer: 第１１回日本流体力学会中部支部講演会
  • Place of Presentation: 名古屋大学
• [Presentation] パッシヴスカラー乱流におけるスカラー勾配場の構造とその統計性 (2013)
  • Author(s): 柴田純一，渡邊 威，後藤 俊幸
  • Organizer: 第１１回日本流体力学会中部支部講演会
  • Place of Presentation: 名古屋大学
• [Presentation] Universality of spectrum of passive scalar variance at very high Schmidt number in isotropic steady turbulence (2012)
  • Author(s): T. Gotoh
  • Organizer: APS meeting
  • Place of Presentation: San Diego
  • Year and Date: 2012-11-20
• [Presentation] 雲粒子と乱流による雲マイクロ物理過程のシミュレーション (2012)
  • Author(s): 小崎友裕, 後藤俊幸, 渡邊威
  • Organizer: 第10回日本流体力学会中部支部講演会
  • Place of Presentation: 千曲市
  • Year and Date: 2012-11-10
• [Presentation] 雲中の雲粒子集団の挙動と乱流 (2012)
  • Author(s): 是石拓哉, 後藤俊幸, 渡邊威, 三浦英昭
  • Organizer: 第LO回日本流体力学会中部支部講演会
  • Place of Presentation: 千曲市
  • Year and Date: 2012-11-09
• [Presentation] Kinetic energy spectrum of the 10w Reynolds number turbulence with polymer additives (2012)
  • Author(s): T. Watanabe and T. Gotoh
  • Organizer: Conference on Computational Physics (CCP2012)
  • Place of Presentation: Kobe
  • Year and Date: 2012-10-15
• [Presentation] 雲中の水滴と乱流の相互作用 (2012)
  • Author(s): 是石拓哉, 後藤俊幸, 三浦英昭
  • Organizer: 日本機械学会第25回計算力学講演会
  • Place of Presentation: 神戸
  • Year and Date: 2012-10-06
• [Presentation] 雲マイクロ物理過程と乱流との相互作用 (2012)
  • Author(s): 小崎友裕, 後藤俊幸, 渡邊威
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 横浜
  • Year and Date: 2012-09-19
• [Remarks] International Workshop on Cloud Turbulence
  • URL: http://comphys.web.nitech.ac.jp/cloud.html