Study on the generation mechanism and the delimitation of occurrence of counter gradient diffusion phenomenon in turbulent heat transfer

湍流传热逆梯度扩散现象产生机理及界定研究

• 批准号: 23560225
• 负责人: HATTORI Hirofumi
• 金额: $ 3.41万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560225/
• 关键词: 逆勾配拡散現象; 乱流熱伝達; 成層乱流; 剥離再付着乱流; 直接数値シミュレーション; 乱流温度混合; 壁面熱的境界条件; 剥離・再付着乱流; はく離，再付着乱流

In this study, the counter gradient diffusion phenomenon which often happens in the stably thermally stratified turbulent boundary layer and turbulent boundary layer with separation and reattachment, had been investigated by means of the direct numerical simulation (DNS), in which the rudimentary process of turbulence the counter gradient diffusion phenomenon appeared was observed and studied. Thermally stratified turbulent boundary layers under various weather and various turbulent heat transport phenomena in boundary layer with separation and reattachment were carried out via DNS, and the occurrence of the counter gradient diffusion phenomenon was successfully reproduced. Also, using the results of DNS, turbulence models in the large eddy simulation and Reynolds averaged Navier-Stokes equation simulation is evaluated in order to reconstruct technique of modelling of turbulence toward the establishment of the simulation of turbulent heat transfer in the next generation.

本文采用直接数值模拟（DNS）方法，对稳定热分层湍流边界层和分离再附湍流边界层中常见的逆梯度扩散现象进行了研究，观察和研究了逆梯度扩散现象出现的湍流初始过程。利用DNS模拟了不同天气条件下的热分层湍流边界层，以及边界层中各种分离和再附着的湍流热输运现象，成功地再现了逆梯度扩散现象的发生。此外，使用DNS的结果，在大涡模拟和雷诺平均Navier-Stokes方程模拟的湍流模型进行评估，以重建技术的湍流建模建立下一代湍流传热的模拟。

项目成果

DNSによるT型混合路内の乱流熱伝達と混合に関する研究

基于DNS的T型混合通道内湍流传热与混合研究

• 发表时间: 2012
• 作者: Yojiro Ishino;Yuya Okita;Yu Saiki;Tahiro Mizokami;服部博文・安西輝顕・保浦知也・田川正人
• 通讯作者: 服部博文・安西輝顕・保浦知也・田川正人

温度成層を伴う乱流境界層温度助走区間のDNS

具有温度分层的湍流边界层升温段的 DNS

• 发表时间: 2013
• 作者: Yojiro Ishino;Naoki Hayashi;Ili Fatimah Bt Abd Razak;Yu Saiki;Y. Egami;服部博文・堀田宏介・保浦知也・田川正人
• 通讯作者: 服部博文・堀田宏介・保浦知也・田川正人

DNS and Predictions for Turbulent Heat Transfer in Boundary Layer with Suddenly Changing Wall Thermal Conditions

壁面热条件突变时边界层湍流传热的 DNS 和预测

• 发表时间: 2012
• 作者: H. Hattori;S. Yamada;M. Tanaka;T. Houra and Y. Nagano
• 通讯作者: T. Houra and Y. Nagano

Structures and Mechanism of Heat and Mass Transport Phenomena in Turbulent Boundary Layer with Separation and Reattachment

分离与再附着湍流边界层传热传质现象的结构与机制

• 发表时间: 2011
• 作者: H. Hattori;T. Noda;M. Tagawa and Y. Nagano
• 通讯作者: M. Tagawa and Y. Nagano

Comparative Study of DNS, LES and Hybrid LES/RANS of Turbulent Boundary Layer with Heat Transfer over 2D Hill

二维山上传热湍流边界层 DNS、LES 和混合 LES/RANS 的比较研究

• 发表时间: 2013
• 期刊: Flow, Turbulence and Combustion
• 作者: H. Hattori;T. Umehara and Y. Nagano
• 通讯作者: T. Umehara and Y. Nagano