Results 1 to 10 of about 528,184 (252)

Grad-Shafranov equation with anisotropic pressure [PDF]

The Astrophysical Journal, 2000
The most general form of the nonrelativistic Grad-Shafranov equation describing anisotropic pressure effects is formulated within the double adiabatic approximation. It gives a possibility to analyze quantitatively how the anisotropic pressure affects the 2D structure of the ideal magnetohydrodynamical flows.
Inga Kuznetsova, Vasily S. Beskin
arxiv   +5 more sources

Kinetic description of mixtures of anisotropic fluids [PDF]

Acta Phys, Pol. B45 (2014) 1103, 2014
A simple system of coupled kinetic equations for quark and gluon anisotropic systems is solved numerically. The solutions are compared with the predictions of the anisotropic hydrodynamics describing a mixture of anisotropic fluids. We find that the solutions of the kinetic equations can be well reproduced by anisotropic hydrodynamics if the initial ...
Florkowski, Wojciech, Madetko, Oskar
arxiv   +3 more sources

Raychaudhuri Equation in an Anisotropic Universe with Anisotropic Sources [PDF]

Gravitation and Cosmology, 2014
In this paper we investigate the fate of the universe with an anisotropic background sourced by anisotropic matter. We see the behaviour of the Raychaudhuri Equation and investigate wheather a congrurence of time like geodesics focus to a point in a universe with Bianchi I background which is dictated by anisotropic sources like cosmic strings, domain ...
arxiv   +6 more sources

On the Anisotropic Landau–Lifshitz Equations

Journal of Mathematical Analysis and Applications, 2001
AbstractIn this paper, we discuss the anisotropic static Landau–Lifshitz equations. We obtain maximum principles and existence results for the small solutions to the Dirichlet problems and the initial-boundary value problems of the corresponding evolution equations. We also construct multiple large smooth solutions in the two dimensions. These problems
Qun Chen
openalex   +3 more sources

Anholonomic Frames, Generalized Killing Equations, and Anisotropic Taub NUT Spinning Spaces [PDF]

Nucl.Phys. B626 (2002) 239-264, 2001
By using anholonomic frames in (pseudo) Riemannian spaces we define anisotropic extensions of Euclidean Taub-NUT spaces. With respect to coordinate frames such spaces are described by off-diagonal metrics which could be diagonalized by corresponding anholonomic transforms. We define the conditions when the 5D vacuum Einstein equations have as solutions
Sergiu I. Vacaru, Ovidiu Tintareanu-Mircea   +1 more
arxiv   +3 more sources

Minimal geometric deformation decoupling in $$2+1$$ 2+1 dimensional space–times

European Physical Journal C: Particles and Fields, 2018
We study the minimal geometric deformation decoupling in $$2+1$$ 2+1 dimensional space–times and implement it as a tool for obtaining anisotropic solutions from isotropic geometries.
Ernesto Contreras, Pedro Bargueño
doaj   +3 more sources

Integrable Anisotropic Evolution Equations on a Sphere [PDF]

Symmetry, Integrability and Geometry: Methods and Applications, 2005
V.V. Sokolov's modifying symmetry approach is applied to anisotropic evolution equations of the third order on the n-dimensional sphere. The main result is a complete classification of such equations.
Anatoly G. Meshkov, Maxim Ju. Balakhnev
doaj   +4 more sources

Nonlinear anisotropic parabolic equations in Lm

Arab Journal of Mathematical Sciences, 2014
In this paper, we give a result of regularity of weak solutions for a class of nonlinear anisotropic parabolic equations with lower-order term when the right-hand side is an Lm function, with m being ”small”.
Fares Mokhtari
doaj   +3 more sources

Local Regularity Results for Minima of Anisotropic Functionals and Solutions of Anisotropic Equations [PDF]

Journal of Inequalities and Applications, 2008
This paper gives some local regularity results for minima of anisotropic functionals I(u;Ω)=∫Ωf(x,u,Du)dx, u∈Wloc1,qi(Ω) and for solutions of anisotropic equations −div𝒜(x,u,Du)=-∑i=1N(∂f/∂
Chu Yuming, Wang Yong, Qiao Jinjing, Gao Hongya   +3 more
doaj   +2 more sources

Anisotropic tempered diffusion equations [PDF]

Nonlinear Analysis, 2020
We introduce a functional framework which is specially suited to formulate several classes of anisotropic evolution equations of tempered diffusion type. Under an amenable set of hypothesis involving a very natural potential function, these models can be shown to belong to the entropy solution framework devised by 4, 5, therefore ensuring well ...
Calvo, J., Marigonda, A., Orlandi, G.
openaire   +3 more sources