Fluid flow over an elliptical cylinder undergoing a rotationally-oscillating motion

The near-wake behind an elliptical cylinder undergoing rotationally-oscillating motion will be simulated using the finite element method at a low Reynolds number, Re=200. The simulations will be carried out by varying the angle of attack between $\pm $10$^{\circ}$, $\pm $20$^{\circ}$, and $\pm $30$^{\circ}$, while the considered range of dimensionless oscillation frequency is St$_{o}$/2$<$St$<$4$\times $St$_{o}$, where St$_{o}$ is the natural Strouhal frequency of a stationary elliptical cylinder. The solver is coupled with a mesh movement scheme using the Arbitrary Lagrangian-Eulerian kinematics to simulate the flow-structural interaction. Fluid mechanics results will be presented in terms of instantaneous and time-average lift and drag coefficients, flow streamline, and vortices contours.