Torres, George L. S.Camacho, EmanuelMarques, Flávio D.Silva, André2022-04-042021-01-04George L. S. Torres, Emanuel. A. R. Camacho, Flávio D. Marques, André R. R. Silva Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers AIAA SciTech 2021 Forum and Exposition, Evento Online, TN, EUA, 11-15 janeiro, 2021978-162410609-5http://hdl.handle.net/10400.6/12149Dynamic stall is an effect frequently seen in nature and rotary wings where flow separation induces strong force oscillations. In order to simulate such phenomena, reduced-order models (ROMs) such as the LESP-modulated discrete-vortex method (LDVM) are often used whose applicability at low Reynolds number is discussed here. CFD computations with the SST were conducted to obtain the critical leading-edge suction parameter (LESP) by analyzing the skin friction coefficient distribution for the Reynolds number tested of 1,500. Results explore both symmetrical and asymmetrical plunging of a NACA0012 airfoil following a triangular velocity profile, indicating a good agreement between experimental, CFD, and LDVM computations, which makes the latter, a very efficient and adequate method to study wake configurations of oscillating airfoils at low Reynolds numbers.engFlappingMicro Air VehicleAerodynamicsjournal article10.2514/6.2021-0968