Post-Processing Tools
For certain aeroacoustics applications, such as fan noise, HVAC noise and train community noise, you need to evaluate flow-induced noise levels at microphones located far away from the turbulent regions simulated in ultraFluidX.
Far-Field Noise Propagation (FW-H) Tool
To support this requirement, sufficient resolution must be added between the source regions and the microphones to accurately propagate acoustic waves with a minimum of dissipation. In some cases, this additional resolution leads to a significant increase of the simulation size and associated computational time. To overcome this limitation, ultraFluidX provides a far-field noise solution based on the resolution of the Ffowcs Williams - Hawkings (FW-H) analogy. The solution consists in reconstructing the far-field noise levels at any distance from the source regions by processing transient flow information recorded in the source regions. The current capability uses input data recorded on non-rotating physical surfaces (partial surface output) or fictitious surfaces (monitoring surface output) to support the solid and porous FW-H formulations, respectively. The tool is run as a post-processing step after the ultraFluidX simulation.