We propose an efficient and accurate solver for the nonlocal potential in the Davey−Stewartson equations using nonuniform FFT (NUFFT). A discontinuity in the Fourier transform of the nonlocal potential causes “accuracy locking” if the potential is solved by standard FFT with periodic boundary conditions on a truncated domain. Using the fact that the discontinuity disappears in polar coordinates, we reformulate the potential integral and split it into high and low frequency parts. The high frequency part can be approximated by the standard FFT method, while the low frequency part is evaluated with a high order Gauss quadrature accelerated by nonuniform FFT. The NUFFT solver has complexity, where is the total number of discretization points, and achieves higher accuracy than standard FFT solver, which makes its use in simulations very attractive. Extensive numerical results show the efficiency and accuracy of the proposed new method.
Accepté le :
DOI : 10.1051/m2an/2016071
Mots-clés : Nonlocal potential solver, nonuniform FFT, Davey–Stewartson equations
@article{M2AN_2017__51_4_1527_0, author = {Mauser, Norbert J. and Stimming, Hans Peter and Zhang, Yong}, title = {A novel nonlocal potential solver based on nonuniform {FFT} for efficient simulation of the {Davey\ensuremath{-}Stewartson} equations}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis }, pages = {1527--1538}, publisher = {EDP-Sciences}, volume = {51}, number = {4}, year = {2017}, doi = {10.1051/m2an/2016071}, mrnumber = {3702423}, zbl = {1375.35387}, language = {en}, url = {http://archive.numdam.org/articles/10.1051/m2an/2016071/} }
TY - JOUR AU - Mauser, Norbert J. AU - Stimming, Hans Peter AU - Zhang, Yong TI - A novel nonlocal potential solver based on nonuniform FFT for efficient simulation of the Davey−Stewartson equations JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2017 SP - 1527 EP - 1538 VL - 51 IS - 4 PB - EDP-Sciences UR - http://archive.numdam.org/articles/10.1051/m2an/2016071/ DO - 10.1051/m2an/2016071 LA - en ID - M2AN_2017__51_4_1527_0 ER -
%0 Journal Article %A Mauser, Norbert J. %A Stimming, Hans Peter %A Zhang, Yong %T A novel nonlocal potential solver based on nonuniform FFT for efficient simulation of the Davey−Stewartson equations %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2017 %P 1527-1538 %V 51 %N 4 %I EDP-Sciences %U http://archive.numdam.org/articles/10.1051/m2an/2016071/ %R 10.1051/m2an/2016071 %G en %F M2AN_2017__51_4_1527_0
Mauser, Norbert J.; Stimming, Hans Peter; Zhang, Yong. A novel nonlocal potential solver based on nonuniform FFT for efficient simulation of the Davey−Stewartson equations. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 51 (2017) no. 4, pp. 1527-1538. doi : 10.1051/m2an/2016071. http://archive.numdam.org/articles/10.1051/m2an/2016071/
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