Abstract
Flow around a square cylinder controlled by plasma actuators is numerically investigated by means of two-dimensional direct numerical simulation. The Reynolds number based on the cylinder diameter and the freestream velocity is set to be 100. Three different arrangements of plasma actuators on the cylinder surface and two different actuation amplitudes are investigated. The drag and the root-mean-square of lift fluctuations are found to reduce in some cases, accompanying a suppression of vortex shedding. Such an effect is most pronounced in the case where the plasma actuators are installed on the rear surface to induce inward flows.
