Applied Mathematics and Mechanics (English Edition) ›› 2015, Vol. 36 ›› Issue (9): 1113-1120.doi: https://doi.org/10.1007/s10483-015-1972-6

• •    下一篇

Numerical investigation of turbulent channel flow controlled by spatially oscillating spanwise Lorentz force

Wentang WU1, Yanji HONG1, Baochun FAN2,3   

  1. 1. National Key Laboratory of Laser Propulsion and Application, Academy of Equipment, Beijing 101416, China;
    2. National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China;
    3. National Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
  • 收稿日期:2014-06-03 修回日期:2015-01-27 出版日期:2015-09-01 发布日期:2015-09-01
  • 通讯作者: Yanji HONG E-mail:hongyanji@vip.sina.com
  • 基金资助:
    Supported by the National Natural Science Foundation of China (Nos. 11172140 and 11372356) and the Open Project of State Key Laboratory of Explosion Science and Technology in Beijing Institute of Technology (No.KFJJ13-3M)

Numerical investigation of turbulent channel flow controlled by spatially oscillating spanwise Lorentz force

Wentang WU1, Yanji HONG1, Baochun FAN2,3   

  1. 1. National Key Laboratory of Laser Propulsion and Application, Academy of Equipment, Beijing 101416, China;
    2. National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China;
    3. National Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
  • Received:2014-06-03 Revised:2015-01-27 Online:2015-09-01 Published:2015-09-01
  • Contact: Yanji HONG E-mail:hongyanji@vip.sina.com
  • Supported by:
    Supported by the National Natural Science Foundation of China (Nos. 11172140 and 11372356) and the Open Project of State Key Laboratory of Explosion Science and Technology in Beijing Institute of Technology (No.KFJJ13-3M)

摘要: A formulation of the skin-friction drag related to the Reynolds shear stress in a turbulent channel flow is derived. A direct numerical simulation (DNS) of the turbulent control is performed by imposing the spatially oscillating spanwise Lorentz force. Under the action of the Lorentz force with several proper control parameters, only the periodically well-organized streamwise vortices are finally observed in the near-wall region. The Reynolds shear stress decreases dramatically, especially in the near-wall area, resulting in a drag reduction.

关键词: Lorentz force, drag reduction, direct numerical simulation (DNS), turbulent channel flow

Abstract: A formulation of the skin-friction drag related to the Reynolds shear stress in a turbulent channel flow is derived. A direct numerical simulation (DNS) of the turbulent control is performed by imposing the spatially oscillating spanwise Lorentz force. Under the action of the Lorentz force with several proper control parameters, only the periodically well-organized streamwise vortices are finally observed in the near-wall region. The Reynolds shear stress decreases dramatically, especially in the near-wall area, resulting in a drag reduction.

Key words: direct numerical simulation (DNS), Lorentz force, drag reduction, turbulent channel flow

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