Results 31 to 40 of about 383,116 (283)

MONOTONIC DERIVATIVE CORRECTION FOR CALCULATION OF SUPERSONIC FLOWS WITH SHOCK WAVES [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2015
Subject of Research. Numerical solution methods of gas dynamics problems based on exact and approximate solution of Riemann problem are considered. We have developed an approach to the solution of Euler equations describing flows of inviscid compressible
P. V. Bulat, K. N. Volkov
doaj   +1 more source

A Finite Difference Method Using High-Order Schemes to Simulate an Equilibrium-Dispersive Model of Non-Linear Chromatography

open access: yesSeparations, 2023
High-performance liquid chromatography (HPLC) is a dynamic separation process with a lot of parameters having different roles. The equilibrium-dispersive model is relevant for simulating HPLC because it is relatively simple and suitable for high ...
Ha-Thanh Cao, Tuan-Anh Nguyen
doaj   +1 more source

Exact finite-difference scheme and nonstandard finite-difference scheme for coupled Burgers equation [PDF]

open access: yesAdvances in Difference Equations, 2014
Abstract This work develops exact finite-difference schemes for the two-dimensional nonlinear coupled viscous Burgers equation using the analytic solution. We extend the explicit nonstandard finite-difference schemes on the basis of the exact finite-difference schemes to solve the coupled Burgers equation.
Zhang, Lei, Wang, Lisha, Ding, Xiaohua
openaire   +2 more sources

Finite difference schemes for the symmetric Keyfitz-Kranzer system

open access: yes, 2012
We are concerned with the convergence of numerical schemes for the initial value problem associated to the Keyfitz-Kranzer system of equations. This system is a toy model for several important models such as in elasticity theory, magnetohydrodynamics ...
A. Tveito   +15 more
core   +1 more source

Finite difference schemes for multilayer diffusion

open access: yesMathematical and Computer Modelling, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
R. I. Hickson   +3 more
openaire   +2 more sources

Comparison of finite‐difference schemes for the Gross‐Pitaevskii equation

open access: yesMathematical Modelling and Analysis, 2009
A conservative finite‐difference scheme for numerical solution of the Gross‐Pitaevskii equation is proposed. The scheme preserves three invariants of the problem: the L 2 norm of the solution, the impulse functional, and the energy functional.
Vyacheslav A. Trofimov, Nikolai Peskov
doaj   +1 more source

On the convergence of difference schemes of high accuracy for the equation of ion-acoustic waves in a magnetized plasma

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2022
Multiparametric difference schemes of the finite element method of a high order of accuracy for the Sobolevtype equation of the fourth-order in time are studied. In particular, the first boundary value problem for the equation of ion-acoustic waves in a
M.M. Aripov, D. Utebaev, Zh.A. Nurullaev
doaj   +1 more source

Lie group stability of finite difference schemes [PDF]

open access: yes, 2007
Differential equations arising in fluid mechanics are usually derived from the intrinsic properties of mechanical systems, in the form of conservation laws, and bear symmetries, which are not generally preserved by a finite difference approximation, and ...
David, Claire   +3 more
core   +2 more sources

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

open access: yesInternational Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam   +2 more
wiley   +1 more source

Modified Finite Difference Schemes on Uniform Grids for Simulations of the Helmholtz Equation at Any Wave Number

open access: yesJournal of Applied Mathematics, 2014
We construct modified forward, backward, and central finite difference schemes, specifically for the Helmholtz equation, by using the Bloch wave property.
Hafiz Abdul Wajid   +3 more
doaj   +1 more source

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