Results 1 to 10 of about 60,575 (170)
Atmosphere, 2022 Air pollution is a global problem that is responsible for more than four million premature deaths each year. Air exchange in ammonia engine rooms is a priority for normal operating conditions, as well as in the event of an emergency release.
Zdzislaw Salamonowicz +5 more
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A modified symplectic discontinuous Galerkin method for acoustic and elastic wave simulations
Frontiers in Earth Science, 2023 Numerically solving seismic wave equations is vital to large-scale forward modeling and full waveform inversion. In this paper, a new modified symplectic discontinuous Galerkin (MSDG) method is proposed to solve the acoustic and elastic equations.
Xijun He +4 more
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Partially Implicit FDTD (PI-FDTD) Method for Lower Dispersion and Anisotropic Errors
IEEE Access, 2022 A new partially implicit 3D FDTD (PI-FDTD) method is introduced. The method is not unconditionally stable, but its stability limit is 6 times higher than that of the classic Yee’s FDTD method.
Mehmet Kusaf, Abdullah Yucel Oztoprak
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Remote Sensing, 2023 High-precision finite difference (FD) wavefield simulation is one of the key steps for the successful implementation of full-waveform inversion and reverse time migration. Most explicit FD schemes for solving seismic wave equations are not compact, which
Liang Chen +5 more
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The Finite Element Method with High-Order Enrichment Functions for Elastodynamic Analysis
Mathematics, 2022 Elastodynamic problems are investigated in this work by employing the enriched finite element method (EFEM) with various enrichment functions. By performing the dispersion analysis, it is confirmed that for elastodynamic analysis, the amount of numerical
Xunbai Du +3 more
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Numerical modelling of hydrogen release and dispersion [PDF]
MATEC Web of Conferences, 2021 Hydrogen is the most abundant element on earth, being a low polluting and high efficiency fuel that can be used for various applications, such as power generation, heating or transportation.
Pasculescu Vlad Mihai +3 more
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Wave Equation Numerical Simulation and RTM With Mixed Staggered-Grid Finite-Difference Schemes
Frontiers in Earth Science, 2022 For the conventional staggered-grid finite-difference scheme (C-SFD), although the spatial finite-difference (FD) operator can reach 2Mth-order accuracy, the FD discrete wave equation is the only second-order accuracy, leading to low modeling accuracy ...
Wei Liu +10 more
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Waves’ Numerical Dispersion and Damping due to Discrete Dispersion Relation [PDF]
Volume 8A: Ocean Engineering, 2014 In linear Rankine panel method, the discrete linear dispersion relation is solved on a discrete free-surface to capture the free-surface waves generated due to wave-body interactions. Discretization introduces numerical damping and dispersion, which depend on the discretization order and the chosen methods for differentiation in time and space.
Ommani, Babak, Faltinsen, Odd Magnus
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Frontiers in Earth Science, 2023 Staggered-grid finite-difference (FD) method is widely used to solve the wave equation for the numerical seismic modeling, and it is a key step of the advanced seismic imaging and inversion problem.
Chunlin Zhang +3 more
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Numerical Dispersive Schemes for the Nonlinear Schrödinger Equation [PDF]
SIAM Journal on Numerical Analysis, 2009 We consider semidiscrete approximation schemes for the linear Schrödinger equation and analyze whether the classical dispersive properties of the continuous model hold for these approximations. For the conservative finite difference semidiscretization scheme we show that, as the mesh size tends to zero, the semidiscrete approximate solutions lose the ...
Liviu I. Ignat, Enrique Zuazua
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