Trixi.jl
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Implement spectral analysis (FFT) of numerical solutions
It would be nice to be able to analyze the spectrum of numerical solutions via FFT, e.g., for the Taylor-Green vortex. This doesn't requir PDE-specific knowledge and would be a nice way to use FFTW.jl.
CC @jlchan
See https://github.com/trixi-framework/paper-2022-robustness-entropy-projection/blob/6402bf40e13e50ce45fa3fd8852cb37e3092c9ae/julia_simulations/utilities.jl#L193-L217 for a 2D example