Results 11 to 20 of about 390,016 (288)

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

Impact of rigid body and viscous-plastic rod of finite length [PDF]

open access: yesE3S Web of Conferences, 2023
The impact of a rigid body and a rod of finite length made of a viscoplastic incompressible material moving towards each other at constant velocity is studied in the article.
Begmatov Abduvali, Mamatova Nigora
doaj   +1 more source

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

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

On an anisotropic fractional Stefan-type problem with Dirichlet boundary conditions

open access: yesMathematics in Engineering, 2023
In this work, we consider the fractional Stefan-type problem in a Lipschitz bounded domain $ \Omega\subset\mathbb{R}^d $ with time-dependent Dirichlet boundary condition for the temperature $ \vartheta = \vartheta(x, t) $, $ \vartheta = g $ on $ \Omega^c\
Catharine W. K. Lo   +1 more
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

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

Ray methods for Free Boundary Problems [PDF]

open access: yes, 2005
We discuss the use of the WKB ansatz in a variety of parabolic problems involving a small parameter. We analyse the Stefan problem for small latent heat, the Black--Scholes problem for an American put option, and some nonlinear diffusion equations, in ...
Addison, J. A.   +2 more
core   +3 more sources

Energy conservation in the one-phase supercooled Stefan problem [PDF]

open access: yes, 2012
© . This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/A one-phase reduction of the one-dimensional two-phase supercooled Stefan problem is developed.
Font Clos, Francesc   +2 more
core   +2 more sources

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