Zobrazeno 1 - 10
of 129
pro vyhledávání: '"Fontelos, M A"'
The evolution of a vortex line following the binormal flow equation (i.e. with a velocity proportional to the local curvature in the direction of the binormal vector) has been postulated as an approximation for the evolution of vortex filaments in bo
Externí odkaz:
http://arxiv.org/abs/2410.05971
In this paper, we study the approximate controllability of a system governed by an evolution problem known as the sloshing problem. This problem involves a spatial, nonlocal differential operator inherent in the dynamics of a two-dimensional, incompr
Externí odkaz:
http://arxiv.org/abs/2402.18468
Autor:
Fontelos, M. A.
We study fragmentation equations with power-law fragmentation rates and polynomial daughter fragments distribution function $p(s)$. The corresponding selfsimillar solutions are analysed and their exponentially decaying asymptotic behaviour and $C^{\i
Externí odkaz:
http://arxiv.org/abs/2212.13413
Autor:
Eggers, J., Fontelos, M. A.
The coagulation (or aggregation) equation was introduced by Smoluchowski in 1916 to describe the clumping together of colloidal particles through diffusion, but has been used in many different contexts as diverse as physical chemistry, chemical engin
Externí odkaz:
http://arxiv.org/abs/2212.12714
Autor:
Breschi, G., Fontelos, M. A.
We study the similarity solutions (SS) of Smoluchowski coagulation equation with multiplicative kernel $K(x,y)=(xy)^{s}$ for $s<\frac{1}{2}$. When $s<0$% , the SS consists of three regions with distinct asymptotic behaviours. The appropriate matching
Externí odkaz:
http://arxiv.org/abs/2212.12581
Autor:
Arrayás, M., Fontelos, M. A.
Publikováno v:
Chaos, Solitons & Fractals Volume 147, June 2021, 111001
In this paper we study the lateral instability of streamer discharges using a continuum discharge model. We observe similarities to Kelvin-Helmholz instability in fluids. In strong electric fields, lateral long wave length perturbations can grow whil
Externí odkaz:
http://arxiv.org/abs/2006.00955
We show that the presence of negative eigenvalues in the spectrum of the angular component of an electromagnetic Schr\"odinger hamiltonian $H$ generically produces a lack of the classical time-decay for the associated Schr\"odinger flow $e^{-itH}$. T
Externí odkaz:
http://arxiv.org/abs/1510.03660
We prove the sharp L^1-L^{\infty} time-decay estimate for the 2D-Schroedinger equation with a general family of scaling critical electromagnetic potentials.
Comment: 26 pages
Comment: 26 pages
Externí odkaz:
http://arxiv.org/abs/1405.1784
Autor:
Breschi, G1 (AUTHOR), Fontelos, M A1 (AUTHOR) marco.fontelos@icmat.es
Publikováno v:
IMA Journal of Applied Mathematics. Apr2023, Vol. 88 Issue 2, p405-428. 24p.
We present the first analytical and numerical studies of the initial stage of the branching process based on an interface dynamics streamer model in the fully 3-D case. This model follows from fundamental considerations on charge production by impact
Externí odkaz:
http://arxiv.org/abs/1203.6790