Multifrontal Hierarchically Semi-separable Solver for 3D Helmholtz Problem Using 27-point Finite-difference SchemeNormal access [Электронный ресурс]

Авторы: Solovyev S.   (ИНГГ СО РАН)   Vishnevsky D.   (ИНГГ СО РАН)   Liu H.    
дата публикации: 2015
We present a multi-frontal hierarchically semi-separable solver to perform forward modeling of the 3D Helmholtz acoustic problem. Our frequency-domain solver combines two efficient approaches. First, it uses an optimal 27-point finite-difference scheme to decrease numerical dispersion and reduce required discretization of the model in terms of points per wavelength from 15 to about 4. Second, it uses a supernodal multi-frontal method based on low-rank approximation and hierarchically semi-separable (HSS) structure to improve performance, decrease memory usage and make it practical for realistic size 3D models required by full-waveform inversion. We validate our new solver using a 3D synthetic model and benchmark it against other codes
первоисточник: 77th EAGE Conference and Exhibition 2015 IFEMA (Madrid, Spain 1-4 June, 2015)
страницы: We P4 09
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