About: Finite difference method is a research topic. Over the lifetime, 21603 publications have been published within this topic receiving 468852 citations. The topic is also known as: Finite-difference methods & FDM.
TL;DR: FDTD equations that allow us to use a nonuniform grid are derived and this grid gives a better accuracy to CPU–resource ratio in a number of circumstances, and tilted and curved boundaries can be described more easily.
Abstract: The finite‐difference time‐domain (FDTD) approximation can be used to solve acoustical field problems numerically. Mainly because it is a time‐domain method, it has some specific advantages. The basic formulation of the FDTD method uses an analytical grid for the discretization of an unknown field. This is a major disadvantage. In this paper, FDTD equations that allow us to use a nonuniform grid are derived. With this grid, tilted and curved boundaries can be described more easily. This gives a better accuracy to CPU–resource ratio in a number of circumstances. The paper focuses on the new formulation and its accuracy. The problem of automatically generating the mesh in a general situation is not addressed. Simulations using quasi‐Cartesian grids are compared to Cartesian grid results.
TL;DR: In this paper, a high-order accurate method for solving the one-dimensional heat and advection-diffusion equations is proposed, which has fourth-order accuracy in both space and time variables, i.e. this method is of order O( h 4, k 4 ).
TL;DR: In this article, finite difference methods with non-uniform meshes for solving nonlinear fractional differential equations are presented, where the non-equidistant stepsize is non-decreasing and the rectangle formula and trapezoid formula are proposed based on theNon- uniform meshes.
TL;DR: In this article, the authors propose a new procedure for designing by rote finite difference schemes that inherit energy conservation or dissipation property from nonlinear partial differential equations, such as the Korteweg-de Vries (KdV) equation and the Cahn-Hilliard equation.