Results 1 to 10 of about 392,892 (335)

THE STATE OF THE PROBLEM OF THE JOINT MOVEMENT OF FLUID IN THE PORE SPACE

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2022
This article discusses the problems of studying the issue of joint motion of liquids in the porous space. The article provides the construction of a mathematical model of the theory of ltration, which describes phase transitions.
A. A. Mussina   +2 more
doaj   +1 more source

A hyperbolic Stefan problem [PDF]

open access: yesQuarterly of Applied Mathematics, 1983
Heat conduction is considered in a semi-infinite solid subjected to a high step change in surface heat flux, such that melting occurs. A time-dependent relaxation model for the energy flux is assumed, leading to a non-Fourier, non-linear equation for the thermal field, which is solved under suitable conditions on the interface displacement.
DE SOCIO, Luciano, GUALTIERI G.
openaire   +3 more sources

On the Two-phase Fractional Stefan Problem

open access: yesAdvanced 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   +2 more
doaj   +1 more source

On sentinel method of one-phase Stefan problem

open access: yesJournal of Nigerian Society of Physical Sciences, 2023
This paper is interested in studying the one-phase Stefan problem. For this purpose, we use the nonlinear sentinel method, which relies typically on the approximate controllability and the Fanchel-Rockafellar duality of the minimization problem, to ...
Merabti Nesrine Lamya   +4 more
doaj   +1 more source

A study of a Stefan problem governed with space–time fractional derivatives [PDF]

open access: yesJournal of Heat and Mass Transfer Research, 2016
This paper presents a fractional mathematical model of a one-dimensional phase-change problem (Stefan problem) with a variable latent-heat (a power function of position).
Rajeev ., M. Kushwaha, Abhishek Singh
doaj   +1 more source

Modeling of freezing processes by an one-dimensional thermal conductivity equation with fractional differentiation operators

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2017
We have studied the Stefan problem with Caputo fractional order time derivatives. The difference scheme is built. The algorithm and the program for a numerical solution of the Stefan problem with fractional differentiation operator are created.
Vetlugin D Beybalaev   +4 more
doaj   +1 more source

A new equivalence of Stefan's problems for the Time-Fractional-Diffusion Equation [PDF]

open access: yes, 2014
A fractional Stefan problem with a boundary convective condition is solved, where the fractional derivative of order $ \alpha \in (0,1) $ is taken in the Caputo sense.
Marcus, Eduardo Santillan   +1 more
core   +2 more sources

On the solution of the steady‐state diffusion problem for ferromagnetic particles in a magnetic fluid

open access: yesMathematical Modelling and Analysis, 2008
A mathematical model for the diffusion process of ferromagnetic particles in a magnetic fluid is described. The unique solvability of the steady‐state particle concentration problem is investigated and an analytical expression for its solution is found ...
Viktor Polevikov, Lutz Tobiska
doaj   +1 more source

Exact solution for a two-phase Stefan problem with variable latent heat and a convective boundary condition at the fixed face [PDF]

open access: yes, 2018
Recently it was obtained in [Tarzia, Thermal Sci. 21A (2017) 1-11] for the classical two-phase Lam\'e-Clapeyron-Stefan problem an equivalence between the temperature and convective boundary conditions at the fixed face under a certain restriction ...
Bollati, Julieta, Tarzia, Domingo A.
core   +2 more sources

Solution of the Moisture Phase Transition Problem in the Insulation and Soils near Pipelines

open access: yesMATEC Web of Conferences, 2016
The analysis of various approaches to the heat conductivity modeling in soils with phase transition based on Stefan problem is provided. Herein the analytical solution for Stefan problem is received only for special cases.The approximate methods of ...
Aksenov Boris, Kryaknina Svetlana
doaj   +1 more source

Home - About - Disclaimer - Privacy