Results 11 to 20 of about 233,661 (218)

ENERGY-CONSERVING AND RECIPROCAL SOLUTIONS FOR HIGHER-ORDER PARABOLIC EQUATIONS

open access: yesJournal of Computational Acoustics, 1999
The energy conservation law and the flow reversal theorem are valid for underwater acoustic fields. In media at rest the theorem transforms into well-known reciprocity principle. The presented parabolic equation (PE) model strictly preserves these important physical properties in the numerical solution.
D. Mikhin
openaire   +3 more sources

Entropy dissipative higher order accurate positivity preserving time-implicit discretizations for nonlinear degenerate parabolic equations [PDF]

open access: yesJournal of Computational and Applied Mathematics, 2023
We develop entropy dissipative higher order accurate local discontinuous Galerkin (LDG) discretizations coupled with Diagonally Implicit Runge-Kutta (DIRK) methods for nonlinear degenerate parabolic equations with a gradient flow structure.
F. Yan, J. V. D. Vegt, Y. Xia, Y. Xu
semanticscholar   +1 more source

Pointwise-in-time a posteriori error control for higher-order discretizations of time-fractional parabolic equations [PDF]

open access: yesJournal of Computational and Applied Mathematics, 2022
Time-fractional parabolic equations with a Caputo time derivative are considered. For such equations, we explore and further develop the new methodology of the a-posteriori error estimation and adaptive time stepping proposed in [7].
S. Franz, N. Kopteva
semanticscholar   +1 more source

Initial-boundary value problem for higher-orders nonlinear elliptic-parabolic equations with variable exponents of the nonlinearity in unbounded domains without conditions at infinity

open access: yesМатематичні Студії, 2023
Initial-boundary value problems for parabolic and elliptic-parabolic (that is degenerated parabolic) equations in unbounded domains with respect to the spatial variables were studied by many authors.
M. M. Bokalo, O. V. Domanska
doaj   +1 more source

Closed-form solutions of higher order parabolic equations in multiple dimensions: A reliable computational algorithm

open access: yesAlexandria Engineering Journal, 2023
Parabolic equations play an important role in chemical engineering, vibration theory, particle diffusion and heat conduction. Solutions of such equations are required to analyze and predict changes in physical systems. Solutions of such equations require
Mubashir Qayyum   +4 more
doaj   +1 more source

Nonlinear differential-difference equations of elliptic and parabolic type and their applications to nonlocal problems

open access: yesСовременная математика: Фундаментальные направления, 2023
In this survey, we study boundary-value problems for nonlinear differential-difference equations of elliptic and parabolic types, as well as related nonlinear equations with nonlocal boundary conditions.
O. V. Solonukha
doaj   +1 more source

Unique Continuation for Parabolic Equations of Higher Order [PDF]

open access: yesNagoya Mathematical Journal, 1966
Let x = (xl,…xn) be a point in the n-dimensional Euclidean space and let be the unit sphere In the (n + 1)-dimensional Euclidean space with coordinate (x, t), we putandwhere denotes the boundary of . We also use the following notation:
Chen, Lu-san, Kuroda, Tadashi
openaire   +3 more sources

Explicit Blowing Up Solutions for a Higher Order Parabolic Equation with Hessian Nonlinearity [PDF]

open access: yesJournal of Dynamics and Differential Equations, 2021
In this work we consider a nonlinear parabolic higher order partial differential equation that has been proposed as a model for epitaxial growth. This equation possesses both global-in-time solutions and solutions that blow up in finite time, for which ...
C. Escudero
semanticscholar   +1 more source

Galerkin-Petrov method for one-dimensional parabolic equations of higher order in domain with a moving boundary [PDF]

open access: yesКомпьютерные исследования и моделирование, 2013
In the current paper, we study a Galerkin-Petrov method for a parabolic equations of higher order in domain with a moving boundary. Asymptotic estimates for the convergence rate of approximate solutions are obtained.
Polina Vitalievna Vinogradova   +2 more
doaj   +1 more source

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