Benefits of FIR-based spectral proper orthogonal decomposition in separation of flow dynamics in the wake of a cantilevered square cylinder

A comparative analysis is presented to illustrate the benefits of finite impulse response (FIR)-based spectral proper orthogonal decomposition (SPOD) over traditional proper orthogonal decomposition (POD) in separating coherent contributions within narrow spectral bandwidth. The wake of a cantilevered square cylinder of height-to-width ratio h / d = 4 protruding a thin laminar boundary layer ( δ / d = 0 . 21 ) is investigated at a Reynolds …