Results 11 to 20 of about 2,222 (26)

Conditional regularity of solutions of the three dimensional Navier-Stokes equations and implications for intermittency

open access: yes, 2012
Two unusual time-integral conditional regularity results are presented for the three-dimensional Navier-Stokes equations. The ideas are based on $L^{2m}$-norms of the vorticity, denoted by $\Omega_{m}(t)$, and particularly on $D_{m} = \Omega_{m}^{\alpha_{
Constantin P.   +9 more
core   +1 more source

On the longtime behavior of a viscous Cahn-Hilliard system with convection and dynamic boundary conditions [PDF]

open access: yes, 2018
In this paper, we study the longtime asymptotic behavior of a phase separation process occurring in a three-dimensional domain containing a fluid flow of given velocity. This process is modeled by a viscous convective Cahn-Hilliard system, which consists
Colli, Pierluigi   +2 more
core   +3 more sources

Conformal flow on $S^3$ and weak field integrability in AdS$_4$

open access: yes, 2017
We consider the conformally invariant cubic wave equation on the Einstein cylinder $\mathbb{R} \times \mathbb{S}^3$ for small rotationally symmetric initial data.
Bizoń, Piotr   +5 more
core   +1 more source

A study of blow-ups in the Keller-Segel model of chemotaxis [PDF]

open access: yes, 2010
We study the Keller-Segel model of chemotaxis and develop a composite particle-grid numerical method with adaptive time stepping which allows us to accurately resolve singular solutions.
Bertozzi A   +15 more
core   +2 more sources

Some Free Boundary Problems involving Nonlocal Diffusion and Aggregation

open access: yes, 2015
We report on recent progress in the study of evolution processes involving degenerate parabolic equations what may exhibit free boundaries. The equations we have selected follow to recent trends in diffusion theory: considering anomalous diffusion with ...
Carrillo, Jose Antonio   +1 more
core   +2 more sources

Data Assimilation algorithm for 3D B\'enard convection in porous media employing only temperature measurements

open access: yes, 2015
In this paper we propose a continuous data assimilation (downscaling) algorithm for the B\'enard convection in porous media using only coarse mesh measurements of the temperature.
Farhat, Aseel   +2 more
core   +1 more source

Continuous Data Assimilation for a 2D B\'enard Convection System through Horizontal Velocity Measurements Alone

open access: yes, 2016
In this paper we propose a continuous data assimilation (downscaling) algorithm for a two-dimensional B\'enard convection problem. Specifically we consider the two-dimensional Boussinesq system of a layer of incompressible fluid between two solid ...
Farhat, Aseel   +2 more
core   +1 more source

Nonconcentration of energy for a semilinear Skyrme model

open access: yes, 2010
We continue our investigation of a model introduced by Adkins and Nappi, in which omega mesons stabilize chiral solitons. The aim of this article is to show that the energy associated to equivariant solutions does not concentrate.Comment: 12 pages, 2 ...
Adkins   +18 more
core   +1 more source

Recent results in mathematical relativity

open access: yes, 2004
We review selected recent results concerning the global structure of solutions of the vacuum Einstein equations. The topics covered include quasi-local mass, strong cosmic censorship, non-linear stability, new constructions of solutions of the constraint
Chrusciel, Piotr T.
core   +1 more source

Inviscid models generalizing the 2D Euler and the surface quasi-geostrophic equations

open access: yes, 2010
Any classical solution of the 2D incompressible Euler equation is global in time. However, it remains an outstanding open problem whether classical solutions of the surface quasi-geostrophic (SQG) equation preserve their regularity for all time.
Chae, Dongho   +2 more
core   +1 more source

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