Results 21 to 30 of about 237,944 (326)

Anholonomic Soliton-Dilaton and Black Hole Solutions in General Relativity [PDF]

open access: yes, 2000
A new method of construction of integral varieties of Einstein equations in three dimensional (3D) and 4D gravity is presented whereby, under corresponding redefinition of physical values with respect to anholonomic frames of reference with associated ...
Vacaru, Sergiu I.
core   +2 more sources

Numerical Study on an RBF-FD Tangent Plane Based Method for Convection–Diffusion Equations on Anisotropic Evolving Surfaces

open access: yesEntropy, 2022
In this paper, we present a fully Lagrangian method based on the radial basis function (RBF) finite difference (FD) method for solving convection–diffusion partial differential equations (PDEs) on evolving surfaces.
Nazakat Adil, Xufeng Xiao, Xinlong Feng
doaj   +1 more source

Gravitational decoupled anisotropies in compact stars

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
Simple generic extensions of isotropic Durgapal–Fuloria stars to the anisotropic domain are presented. These anisotropic solutions are obtained by guided minimal deformations over the isotropic system.
Luciano Gabbanelli   +2 more
doaj   +1 more source

The theory of generalized micropolar thermoelastic diffusion with double porosity [PDF]

open access: yesTheoretical and Applied Mechanics, 2022
The main purpose of the paper is to derive the constitutive relations and field equations for anisotropic micropolar thermoelastic medium with mass diffusion and double porosity.
Kansal Tarun
doaj   +1 more source

Thermal Effect on Elastic Waves of Anisotropic Saturated Porous Solid

open access: yesModelling and Simulation in Engineering, 2011
The motion equations of anisotropic media, coupled to the mass conservation and thermoequilibrium equations of fluid, are studied here based on the standard space of physical presentation for thermoelastic dynamics of anisotropic saturated porous solids.
S. H. Guo
doaj   +1 more source

Propagation of electromagnetic waves in anisotropic magnetoelectric medium

open access: yesҚарағанды университетінің хабаршысы. Физика сериясы, 2019
In the article we consider porpagation and interaction of electromagnetic waves of different polarization, in anisotropic medium that is inhomogeneous along the Z axis with magnetoelectric effect of tetragonal, trigonal, and hexagonal symmetries are ...
S.K. Tleukenov   +2 more
doaj   +1 more source

Reflectionless anisotropic multilayers for both polarisations at grazing incidence

open access: yesEPJ Applied Metamaterials, 2022
We find a method for designing anisotropic multilayer profiles that are reflectionless at grazing incidence, for both electromagnetic polarisations.
Patient Dean A., Horsley Simon A.R.
doaj   +1 more source

Influence of Electric Charge and Modified Gravity on Density Irregularities [PDF]

open access: yes, 2016
This work aims to identify some inhomogeneity factors for plane symmetric topology with anisotropic and dissipative fluid under the effects of both electromagnetic field as well as Palatini $f(R)$ gravity.
Bhatti, M. Zaeem Ul Haq, Yousaf, Z.
core   +2 more sources

A Liouville type theorem for a class of anisotropic equations

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2016
In this paper we are dealing with entire solutions of a general class of anisotropic equations. Under some appropriate conditions on the data, we show that the corresponding equations cannot have non-trivial positive solutions bounded from above.
Barbu Luminiţa, Enache Cristian
doaj   +1 more source

Minimal Geometric Deformation: the inverse problem

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
In this paper we show that any static and spherically symmetric anisotropic solution of the Einstein field equations can be thought as a system sourced by certain deformed isotropic system in the context of Minimal Geometric Deformation-decoupling ...
Ernesto Contreras
doaj   +1 more source

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