Zobrazeno 1 - 10
of 859
pro vyhledávání: '"Éfendiev, A."'
Publikováno v:
Caspian Journal of Environmental Sciences, Vol 10, Iss 1, Pp 1-8 (2012)
In the present study seven synthetic polymers were used as adsorbents for the removal of Cd(II) from aqueous solution. The equilibrium studies were systematically carried out in a batch process, covering various process parameters that include agit
Externí odkaz:
https://doaj.org/article/d5019cac448b4434890e17078358eaad
In this paper, we propose multicontinuum splitting schemes for multiscale problems, focusing on a parabolic equation with a high-contrast coefficient. Using the framework of multicontinuum homogenization, we introduce spatially smooth macroscopic var
Externí odkaz:
http://arxiv.org/abs/2410.05253
In this paper, we develop a general framework for multicontinuum homogenization in perforated domains. The simulations of problems in perforated domains are expensive and, in many applications, coarse-grid macroscopic models are developed. Many previ
Externí odkaz:
http://arxiv.org/abs/2404.17471
Autor:
Efendiev, Messoud, Vougalter, Vitali
In the article we establish the global well-posedness in W^{1, 2, 2}(R\times R^{+}) of the integro-differential equation in the case of the anomalous diffusion when the one dimensional negative Laplace operator is raised to a fractional power in the
Externí odkaz:
http://arxiv.org/abs/2404.04342
Autor:
Efendiev, Messoud, Vougalter, Vitali
We prove the existence of solutions for some integro-differential systems containing equations with and without the drift terms in the H^2 spaces by virtue of the fixed point technique when the elliptic equations contain second order differential ope
Externí odkaz:
http://arxiv.org/abs/2401.12458
We study a semi-discrete model for the two-dimensional incompressible porous medium (IPM) equation describing gravitational fingering phenomenon. The model consists of a system of advection-reaction-diffusion equations on concentration, velocity and
Externí odkaz:
http://arxiv.org/abs/2401.05981
In this paper, we discuss a general framework for multicontinuum homogenization. Multicontinuum models are widely used in many applications and some derivations for these models are established. In these models, several macroscopic variables at each
Externí odkaz:
http://arxiv.org/abs/2309.08128
The splitting method is a powerful method for solving partial differential equations. Various splitting methods have been designed to separate different physics, nonlinearities, and so on. Recently, a new splitting approach has been proposed where so
Externí odkaz:
http://arxiv.org/abs/2208.06790
Autor:
Efendiev, Yalchin, Leung, Wing Tat
In this paper, we present a general derivation of multicontinuum equations and discuss cell problems. We present constraint cell problem formulations in a representative volume element and oversampling techniques that allow reducing boundary effects.
Externí odkaz:
http://arxiv.org/abs/2208.04005
In this paper, we consider a class of convection-diffusion equations with memory effects. These equations arise as a result of homogenization or upscaling of linear transport equations in heterogeneous media and play an important role in many applica
Externí odkaz:
http://arxiv.org/abs/2204.00554