Local wall heating effects on aeroacoustic field radiated by an isolated square cylinder in a laminar flow

Abstract The aim of this work is to gain an insight on the effect wall heating aeroacoustic sound radiated by bluff bodies in laminar flows. In particular, local thermal treatment boundary was investigated as a possible method for active controlling emitted noise. This technique studied performing direct numerical simulations noise produced isolated square cylinder operating at Reynolds and Mach numbers equal 150 0.2, respectively. considered case, Karman vortex street deriving flow/cylinder interaction, produces lift drag pulsation body surface, leading dipolar-like emission. context, different fluxes were applied order reduce its aerodynamic forces fluctuation and, consequently, associated pressure disturbance that sound. computations are performed using OpenFOAM solver adopts explicit Runge-Kutta scheme time integration second-order, energy conserving convective part Eulerian flux. Moreover, spurious waves reflections far-field damped adopting sponge-layer approach.