Underlay mechanism in lift-drag phase diagrams for shear flow over cylinder

邓镇国,; 马和平,; 张辉,; 范宝春,; 陈志华,; 李艳玲,

doi:10.1007/s10483-014-1785-8

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2015

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“…Various methods have been proposed, focusing on the suppression of the near-wall coherent structures, e.g., wall oscillation [10][11][12] , deformed wall [13][14][15] , blowing and suction wall [16][17] , and turbulent flows around cylinders [18][19] .…”

Section: Introductionmentioning

confidence: 99%

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

Wen-Tang¹,

Hong²,

Fan

2015

Appl. Math. Mech.-Engl. Ed.

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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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