Journal
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
Volume 36, Issue 9, Pages 1113-1120Publisher
SHANGHAI UNIV
DOI: 10.1007/s10483-015-1972-6
Keywords
turbulent channel flow; direct numerical simulation (DNS); drag reduction; Lorentz force
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Funding
- National Natural Science Foundation of China [11172140, 11372356]
- Open Project of State Key Laboratory of Explosion Science and Technology in Beijing Institute of Technology [KFJJ13-3M]
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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.
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