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The purpose of this paper is to investigate turbulence effects on characteristics of local severe suction on side face of a three-dimensional square cylinder by LES. The behavior of conical vortices associated with local suctions at the angle of the attack =0, and glancing angle are focused on. First, the computed results for distribution of the pressure coefficients are validated through comparison with the experimental data. Next, using the computed results, the effects of inflow turbulence on the high peak suctions and flow characteristics are examined. As a result, high peak suctions occur associated with wake characteristics and flow reattachment characteristics affected by the large scale fluctuation of oncoming turbulence.

LES OF LOCAL SEVERE SUCTION ON SIDE FACE OF A THREE-DIMENSIONAL SQUARE CYLINDER