Results 41 to 50 of about 1,084 (89)

Gauge techniques in time and frequency domain TLM

, 2009
Typical features of the Transmission Line Matrix (TLM) algorithm in connection with stub loading techniques and prone to be hidden in common frequency domain formulations are elucidated within the propagator approach to TLM.
Cap, Christopoulos, De Cogan, De Cogan, Hein, Hein, Hein, Hein, Hoefer, Johns, Lax, Mandl, Steffen Hein, Witwit   +13 more
core   +1 more source

LDG schemes with second order implicit time discretization for a fractional sub-diffusion equation

Results in Applied Mathematics, 2019
In this paper, we propose new local discontinuous Galerkin (LDG) schemes for solving a time fractional sub-diffusion equation. The new LDG schemes is constructed rely on the splitting of time fractional derivative and space derivative.
Can Li, Xiaorui Sun, Fengqun Zhao
doaj   +1 more source

A moving mesh method with variable relaxation time

, 2006
We propose a moving mesh adaptive approach for solving time-dependent partial differential equations. The motion of spatial grid points is governed by a moving mesh PDE (MMPDE) in which a mesh relaxation time \tau is employed as a regularization ...
Adjerid, Ali Reza Soheili, Ascher, Baines, Bebernes, Budd, Budd, Carlson, Coyle, Friedman, Huang, Huang, Hyman, John M. Stockie, Li, Lipnikov, Petzold, Sanz-Serna, Stockie, Tan, Tang   +20 more
core   +1 more source

On the Two-phase Fractional Stefan Problem

Advanced Nonlinear Studies, 2020
The classical Stefan problem is one of the most studied free boundary problems of evolution type. Recently, there has been interest in treating the corresponding free boundary problem with nonlocal diffusion.
del Teso Félix, Endal Jørgen, Vázquez Juan Luis   +2 more
doaj   +1 more source

Invariant conservative finite-difference schemes for the one-dimensional shallow water magnetohydrodynamics equations in Lagrangian coordinates [PDF]

Open Communications in Nonlinear Mathematical Physics
Invariant finite-difference schemes for the one-dimensional shallow water equations in the presence of a magnetic field for various bottom topographies are constructed. Based on the results of the group classification recently carried out by the authors,
E. I. Kaptsov, V. A. Dorodnitsyn
doaj   +1 more source

Behavior of different numerical schemes for population genetic drift problems [PDF]

, 2016
In this paper, we focus on numerical methods for the genetic drift problems, which is governed by a degenerated convection-dominated parabolic equation.
Chen, Minxin, Liu, Chun, Xu, Shixin, Yue, Xingye, Zhang, Ran   +4 more
core  

Solving Vertical Transport and Chemistry in Air Pollution Models. [PDF]

, 2000
For the time integration of stiff transport-chemistry problems from air pollution modelling, standard ODE solvers are not feasible due to the large number of species and the 3D nature.
Berkvens, P.J.F., Botchev, M.A., Krol, M.C., Peters, W., Verwer, J.G.   +4 more
core   +4 more sources

‘The Equator–Pole grid system’: an overset grid system for the sphere, with an optimal uniformity property

Tellus: Series A, Dynamic Meteorology and Oceanography, 2018
This article proposes a new grid system for the sphere, which consists of three orthogonal and almost uniform grids. The basic one is a latitude-longitude grid covering an annular band around the equator.
Göran Starius
doaj   +1 more source

Unveiling new insights: taming complex local fractional Burger equations with the local fractional Elzaki transform decomposition method

Frontiers in Applied Mathematics and Statistics
This study aims to address the difficulties in solving coupled generalized non-linear Burger equations using local fractional calculus as a framework. The methodology used in this work, particularly in the area of local fractional calculus, combines the ...
Ghaliah Alhamzi, J. G. Prasad, B. S. T. Alkahtani, R. S. Dubey   +3 more
doaj   +1 more source

Uniformly convergent extended cubic B-spline collocation method for two parameters singularly perturbed time-delayed convection-diffusion problems. [PDF]

BMC Res Notes, 2023
Negero NT.
europepmc   +1 more source