Numerical schemes for continuum models of reaction-diffusion systems subject to internal noise
We present numerical schemes to integrate stochastic partial differential equations which describe the spatio-temporal dynamics of reaction-diffusion problems under the effect of internal fluctuations. The schemes conserve the non-negativity of the solutions and incorporate the Poissonian nature of...
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| Published in | Physical review. E, Statistical, nonlinear, and soft matter physics Vol. 70; no. 4 Pt 2; p. 045102 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
United States
01.10.2004
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| Online Access | Get more information |
| ISSN | 1539-3755 |
| DOI | 10.1103/PhysRevE.70.045102 |
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| Abstract | We present numerical schemes to integrate stochastic partial differential equations which describe the spatio-temporal dynamics of reaction-diffusion problems under the effect of internal fluctuations. The schemes conserve the non-negativity of the solutions and incorporate the Poissonian nature of internal fluctuations at small densities, their performance being limited by the level of approximation of density fluctuations at small scales. We apply the schemes to two different aspects of the Reggeon model, namely, the study of its nonequilibrium phase transition and the dynamics of fluctuating pulled fronts. In the latter case, our approach allows us to reproduce microscopic properties quantitatively within the continuum model. |
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| AbstractList | We present numerical schemes to integrate stochastic partial differential equations which describe the spatio-temporal dynamics of reaction-diffusion problems under the effect of internal fluctuations. The schemes conserve the non-negativity of the solutions and incorporate the Poissonian nature of internal fluctuations at small densities, their performance being limited by the level of approximation of density fluctuations at small scales. We apply the schemes to two different aspects of the Reggeon model, namely, the study of its nonequilibrium phase transition and the dynamics of fluctuating pulled fronts. In the latter case, our approach allows us to reproduce microscopic properties quantitatively within the continuum model. |
| Author | Moro, Esteban |
| Author_xml | – sequence: 1 givenname: Esteban surname: Moro fullname: Moro, Esteban organization: Grupo Interdisciplinar de Sistemas Complejos (GISC) and Departamento de Matemáticas, Universidad Carlos III de Madrid, Avenida de la Universidad 30, E-28911 Leganés, Spain |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/15600447$$D View this record in MEDLINE/PubMed |
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