Propagation acceleration in reaction diffusion equations with anomalous diffusions

نویسندگان

چکیده

In this paper we consider the propagation speed in a reaction diffusion system with an anomalous Lévy process diffusion, modeled by nonlocal equation fractional Laplacian and generalized monostable or ignition nonlinearity. Given typical Heaviside initial datum, show that of interface displays algebraic rate behavior time, contrast to known linear classical model Brownian motion exponential KPP depends on sensitive balance between anomaly strength reaction. particular, for combustion (??)s, transits continuously from being when traveling wave solution exists s ? (1/2, 1), time power reciprocal 2s, no (0, 1/2).

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Nonlinear Evolution Equations with Anomalous Diffusions

French and Polish teams have a record of successful collaborations which resulted in methods and results that are actually attracting a growing interest of the applied mathematics community. In this new project, the participants aim at understanding the role of anomalous diffusions in two important classes of nonlinear evolution equations: kinetic equations with a Lévy-Fokker-Planck operator an...

متن کامل

Anomalous diffusion with linear reaction dynamics: from continuous time random walks to fractional reaction-diffusion equations.

We have revisited the problem of anomalously diffusing species, modeled at the mesoscopic level using continuous time random walks, to include linear reaction dynamics. If a constant proportion of walkers are added or removed instantaneously at the start of each step then the long time asymptotic limit yields a fractional reaction-diffusion equation with a fractional order temporal derivative o...

متن کامل

Front propagation in hyperbolic fractional reaction-diffusion equations.

From the continuous-time random walk scheme and assuming a Lévy waiting time distribution typical of subdiffusive transport processes, we study a hyperbolic reaction-diffusion equation involving time fractional derivatives. The linear speed selection of wave fronts in this equation is analyzed. When the reaction-diffusion dimensionless number and the fractional index satisfy a certain condition...

متن کامل

Nepomnyashchy reaction systems − Fronts in anomalous diffusion

Supplementary data rsta.2012.0179.DC1.html http://rsta.royalsocietypublishing.org/content/suppl/2012/11/23/ "Presentation at Turbulent Mixing and Beyond conference" References 79.full.html#ref-list-1 http://rsta.royalsocietypublishing.org/content/371/1982/201201 This article cites 62 articles Subject collections (52 articles) mathematical physics • collections Articles on similar topics can be...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Nonlinearity

سال: 2021

ISSN: ['0951-7715', '1361-6544']

DOI: https://doi.org/10.1088/1361-6544/abe17c