[PDF] Top 20 Two examples of reaction-diffusion front propagation in heterogeneous media
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Two examples of reaction-diffusion front propagation in heterogeneous media
... transition, propagation, vitesse. Abstract : The aim of this thesis is to study two examples of propagation phenomena in heterogeneous ... Voir le document complet
140
Modeling the self-propagation reaction in heterogeneous and dense media: Application to Al/CuO thermite
... and diffusion coefficients for each ...properties of the condensed phase reaction mechanisms one should be able to determine the characteristic time of diffusions of each reactant that ... Voir le document complet
34
Propagation phenomena and reaction–diffusion systems for population dynamics in homogeneous or periodic media
... periodic diffusion and interspecific competition rates, an existence result is ...fully heterogeneous problem (non-periodic non-constant coefficients) is, as far as we know, still completely open at this ... Voir le document complet
328
Propagation acceleration in reaction diffusion equations with anomalous diffusions
... interesting, in particular in the case 0 < s < 1 2 , as they give a very simple way of showing the non-existence of the traveling wave solution to the problem (3) with any general non ... Voir le document complet
31
Fast propagation in reaction-diffusion equations with fractional diffusion
... I of the thesis has been devoted to a rigorous analysis of the asymptotic location of the level sets of the solution to two different ...problems. In Chapter 1, we have applied ... Voir le document complet
176
Persistence and propagation in periodic reaction-diffusion models
... zero of f . In the moving frame with speed c to the right, a traveling front u(t, x) = φ(x − ct) is invariant in ...classes of perturbations, see e.g. [8, 28, 29, 42, 46]. For ... Voir le document complet
13
Reaction diffusion equation in heterogeneous media : persistance, propagation and effect of the geometry
... existence of transition fronts in non homogeneous ...existence of transition fronts (almost planar) when f is heterogeneous with respect to time in the bistable, monostable and KPP ... Voir le document complet
217
Asymptotic spreading for Fisher-KPP reaction-diffusion equations with heterogeneous shifting diffusivity
... speed of the solutions of a Fisher-KPP reaction- diffusion equation, starting from compactly supported initial data, when the diffusion coefficient is a fixed bounded monotone profile ... Voir le document complet
35
Discrete modelling of front propagation in backward piping erosion
... Backward erosion was observed for larger values of the driving pressure difference, roughly in the branch from b to d in Figure 3 given the considered definition for eroded grains.. The er[r] ... Voir le document complet
4
Gradient schemes for two-phase flow in heterogeneous porous media and Richards equation
... Numerical examples In the numerical tests proposed in this section, we use the Vertex Approximate Gradient scheme, denoted VAG, introduced in [17] and developed for compositional multiphase ... Voir le document complet
31
A Seminumerical Approach for Heat Diffusion in Heterogeneous Media: One Extension of the Analytical Quadrupole Method
... solution of the corresponding vectorial dif- ferential ...generalization of the proposed method to a three-dimen- sional case is relatively easy, and two-dimensional gridding is then ...is of ... Voir le document complet
25
Asymptotic wave methods in heterogeneous media
... The recorded seismic wavefield depends generally on three main mechanisms: (1) the wave generation (the source of energy), (2) the propagation through the complex me[r] ... Voir le document complet
260
Effective transient behaviour of heterogeneous media in diffusion problems with a large contrast in the phase diffusivities
... effective diffusion behaviour. In polycrystals, the presence of fast diffusion paths (grain boundaries, free surfaces, dislocations) leads to distinct, possibly non-Fickian limiting regimes, ... Voir le document complet
37
Correspondence Between One- and Two-Equation Models for Solute Transport in Two-Region Heterogeneous Porous Media
... descriptions of the transport ...form of constraints regarding the space and timescales of the transport ...uniqueness of these constraints and the scaling must be adapted to the physical con- ... Voir le document complet
27
Analysis of wave propagation in unbounded media
... one of several versions: author’s original, accepted manuscript or the publisher’s ...use of this website and the material on it are subject to the Terms and Conditions set forth ... Voir le document complet
12
Tensor-based multiscale method for diffusion problems in quasi-periodic heterogeneous media★
... issue of complexity reduction for the numerical simulation of multiscale media in a quasi-periodic ...elliptic diffusion equation defined on a domain D such that D is the union ... Voir le document complet
24
Critical travelling waves for general heterogeneous one-dimensional reaction-diffusion equations
... translation in time, such as ignition-type or monostable equations, these waves satisfy a property which is close to the translation property introduced in [18] (Proposition ...waves in the ... Voir le document complet
49
Stochastic PDE's for water flow, solute transport and wave propagation phenomena in heterogeneous geologic media.
... This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 10645 To cite this version : Ababou , Rachid Stochastic PDE's for water flow, solute transport and wave ... Voir le document complet
2
A nodal high-order discontinuous Galerkin method for elastic wave propagation in arbitrary heterogeneous media
... highly heterogeneous media in ...integration of the mass and stiffness matrices on the reference element, implicitly assuming constant physical properties within each element of the ... Voir le document complet
19
Two-domain description of solute transport in heterogeneous porous media: Comparison between theoretical predictions and numerical experiments
... simulation. Examples of proce- dures available for the case of single-phase flow can be found in the literature [9–13] .... In most cases, it is assumed that the macroscopic model ... Voir le document complet
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