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A team of researchers is looking into the science surrounding the aeroacoustics of jet engines and researching how to make them quieter. The computational challenges the research team faces invariably involve turbulence, which is an unsteady, chaotic motion of a fluid. In the practicalities of calculating a turbulent flow, a researcher has two options: (1) make many assumptions and have a small computational model or, (2) make few assumptions and have a very large computational model.
Because the researchers don't yet understand sound generation at a fundamental level, they have to resolve all of the scales of motion involved in the turbulent flow.Image credit: Stefan Thiesen (Own work) [CC BY-SA 3.0], via Wikimedia Commons
