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Use FFT for MAC projection cases #152

Merged
merged 2 commits into from
Oct 22, 2024
Merged

Use FFT for MAC projection cases #152

merged 2 commits into from
Oct 22, 2024

Commits on Oct 21, 2024

  1. Use FFT for MAC projection cases 

    For level 0 MAC projection with all periodic boundaries or periodic in the
first two dimensions and Neumann in the last dimension, there is now the
option of using FFT. To compile with FFT support, use `USE_FFT=TRUE` for GNU
Make and `HYDRO_FFT=ON` (which will turn on AMReX_FFT) for CMake. At
runtime, one needs to specify `mac_proj.use_fft = 1`. If the conditions for
FFT support are not satisfied, a runtime error may occur. So don't set
`mac_proj.use_fft=1` unless FFT is supported for the problem.

Note that the current implementation is still experimental.
    @WeiqunZhang
    WeiqunZhang committed Oct 21, 2024
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  2. Fix warning

    @WeiqunZhang
    WeiqunZhang committed Oct 21, 2024
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