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Transpose-free Fast Fourier Transform for Turbulence Simulation
Published 21 Jun 2014 in cs.MS, cs.CE, cs.DS, physics.comp-ph, and physics.flu-dyn | (1406.5597v1)
Abstract: Pseudo-spectral method is one of the most accurate techniques for simulating turbulent flows. Fast Fourier transform (FFT) is an integral part of this method. In this paper, we present a new procedure to compute FFT in which we save operations during interprocess communications by avoiding transpose of the array. As a result, our transpose-free FFT is 15\% to 20\% faster than FFTW.
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