fourier

Fourier pseudospectral discretization

elementwise_derivative!(coord, ff, adv_fac, spectral::fourier_info)

Fourier transform f to get spectral coefficients and use them to calculate f'.

Note: Fourier derivative does not make use of upwinding information.

elementwise_derivative!(coord, ff, fourier::fourier_info)

Fourier transform f to get spectral coefficients and use them to calculate f'.

create arrays needed for explicit Fourier pseudospectral treatment and create the plans for the forward and backward fast Fourier transforms