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

doi:10.1007/s10483-015-1972-6

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

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

Wentang WU¹, Yanji HONG¹, Baochun FAN^2,3

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)

Abstract

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

2010 MSC Number:

O357.5

Wentang WU, Yanji HONG, Baochun FAN. Numerical investigation of turbulent channel flow controlled by spatially oscillating spanwise Lorentz force. Applied Mathematics and Mechanics (English Edition), 2015, 36(9): 1113-1120.

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

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