For acoustics, ANSYS Fluent can compute the noise resulting from unsteady pressure fluctuations in several ways. Transient LES predictions for surface pressure can be converted to a frequency spectrum using the built-in fast Fourier transform (FFT) tool. The Ffowcs–Williams and Hawkings acoustics analogy can be used to model the propagation of acoustics sources for various objects, ranging from exposed bluff bodies to rotating fan blades. Broadband noise source models allow acoustic sources to be estimated based on the results of steady-state simulations.

Aero-acoustic simulation of trailing-edge noise from NACA 0012 airfoil