Results 1 to 10 of about 205,008 (119)

Finite-Difference Operators for 2D problems [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2020
This paper presents the concept of using algorithms for reducing the dimensions of finite-difference equations of two-dimensional (2D) problems, for second-order partial differential equations.
T. Sobczyk
doaj   +1 more source

Finite difference schemes with monotone operators

open access: yesAdvances in Difference Equations, 2004
Several existence theorems are given for some second-order difference equations associated with maximal monotone operators in Hilbert spaces. Boundary conditions of monotone type are attached.
N. C. Apreutesei
doaj   +2 more sources

Higher order approximation in exponential form based on half-step grid-points for 2D quasilinear elliptic BVPs on a variant domain

open access: yesMethodsX, 2023
This paper reports a new fourth order Finite Difference Method (FDM) in exponential form for two-dimensional quasilinear boundary value problem of elliptic type (BVPE) with variant solution domain.
Nikita Setia, R.K. Mohanty
doaj   +1 more source

A parameter uniform method for two-parameter singularly perturbed boundary value problems with discontinuous data

open access: yesMethodsX, 2023
We consider two-parameter singularly perturbed problems of reaction-convection-diffusion type in one dimension. The convection coefficient and source term are discontinuous at a point in the domain.
Nirmali Roy, Anuradha Jha
doaj   +1 more source

A two-dimensional linear elasticity problem for anisotropic materials, solved with a parallelization code [PDF]

open access: yesINCAS Bulletin, 2010
The present paper introduces a numerical approach of static linear elasticity equations for anisotropic materials. The domain and boundary conditions are simple, to enhance an easy implementation of the finite difference scheme. SOR and gradient are used
Mihai-Victor PRICOP, Cornelia NIŢǍ
doaj   +1 more source

Conservative finite difference schemes for dynamical systems

open access: yesDiscrete and Continuous Models and Applied Computational Science, 2022
The article presents the implementation of one of the approaches to the integration of dynamical systems, which preserves algebraic integrals in the original fdm for Sage system.
Yu Ying, Zhen Lu
doaj   +1 more source

Features of processing of marine seismic observations using finite-difference full-wave migration

open access: yesГеофизический журнал, 2013
Features and basic principles of plotting the graph of marine seismic observations processing with application of original method of finite-difference total wave migration of the sum of central middle point, which is more stabile in case of investigation
A. O. Verpahovskaya   +2 more
doaj   +1 more source

A mathematical system of COVID-19 disease model: Existence, uniqueness, numerical and sensitivity analysis

open access: yesMethodsX, 2023
A compartmental mathematical model of spreading COVID-19 disease in Wuhan, China is applied to investigate the pandemic behaviour in Iran. This model is a system of seven ordinary differential equations including individual behavioural reactions ...
Khadijeh Sadri   +2 more
doaj   +1 more source

Expanded Microchannel Heat Exchanger: Finite Difference Modeling

open access: yesDesigns, 2021
A finite difference model of a heat exchanger (HX) considered maldistribution, axial conduction, heat leak, and the edge effect, all of which are needed to model a high effectiveness HX.
David Denkenberger   +4 more
doaj   +1 more source

Finite-difference analysis for the linear thermoporoelasticity problem and its numerical resolution by multigrid methods

open access: yesMathematical Modelling and Analysis, 2012
This paper deals with the numerical solution of a two-dimensional thermoporoelasticity problem using a finite-difference scheme. Two issues are discussed: stability and convergence in discrete energy norms of the finite-difference scheme are proved, and ...
Natalia Boal   +3 more
doaj   +1 more source

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