### Abstract

We consider an approach to constructing approximate analytical solutions for the one-dimensional twocomponent reaction-diffusion model describing the dynamics of population interacting with the active substance surrounding the population. The system of model equations includes the nonlocal generalized Fisher–Kolmogorov–Petrovsky–Piskunov equation for the population density and the diffusion equation for the density of the active substance. Both equations contain additional terms describing the mutual influence of the population and the active substance. To find approximate solutions of the system of model equations, we first use the perturbation method with respect to the small parameter of interaction between the population and the active substance. Then we apply the well-known iterative method developed by G. Adomian to solve equations for terms of perturbation series. In the method proposed, the solution is presented as a series whose terms are determined by the corresponding iterative procedure. In this work, the diffusion operator is taken as the operator for which the inverse operator is expressed in terms of the diffusion propagator. This allows one to find the approximate solutions in the class of functions decreasing at infinity. As an illustration, we consider an example of solving the Cauchy problem for the initial functions of a Gaussian form.

Original language | English |
---|---|

Pages (from-to) | 835-847 |

Number of pages | 13 |

Journal | Russian Physics Journal |

Volume | 62 |

Issue number | 5 |

DOIs | |

Publication status | Published - 1 Sep 2019 |

### Fingerprint

### Keywords

- Kolmogorov
- Petrovsky
- Piskunov equation, perturbation theory, Adomian decomposition method
- reaction-diffusion model, nonlocal generalized Fisher

### ASJC Scopus subject areas

- Physics and Astronomy(all)

### Cite this

**Adomyan Decomposition Method for a Two-Component Nonlocal Reaction-Diffusion Model of the Fisher–Kolmogorov–Petrovsky–Piskunov Type.** / Shapovalov, A. V.; Trifonov, A. Yu.

Research output: Contribution to journal › Article

}

TY - JOUR

T1 - Adomyan Decomposition Method for a Two-Component Nonlocal Reaction-Diffusion Model of the Fisher–Kolmogorov–Petrovsky–Piskunov Type

AU - Shapovalov, A. V.

AU - Trifonov, A. Yu

PY - 2019/9/1

Y1 - 2019/9/1

N2 - We consider an approach to constructing approximate analytical solutions for the one-dimensional twocomponent reaction-diffusion model describing the dynamics of population interacting with the active substance surrounding the population. The system of model equations includes the nonlocal generalized Fisher–Kolmogorov–Petrovsky–Piskunov equation for the population density and the diffusion equation for the density of the active substance. Both equations contain additional terms describing the mutual influence of the population and the active substance. To find approximate solutions of the system of model equations, we first use the perturbation method with respect to the small parameter of interaction between the population and the active substance. Then we apply the well-known iterative method developed by G. Adomian to solve equations for terms of perturbation series. In the method proposed, the solution is presented as a series whose terms are determined by the corresponding iterative procedure. In this work, the diffusion operator is taken as the operator for which the inverse operator is expressed in terms of the diffusion propagator. This allows one to find the approximate solutions in the class of functions decreasing at infinity. As an illustration, we consider an example of solving the Cauchy problem for the initial functions of a Gaussian form.

AB - We consider an approach to constructing approximate analytical solutions for the one-dimensional twocomponent reaction-diffusion model describing the dynamics of population interacting with the active substance surrounding the population. The system of model equations includes the nonlocal generalized Fisher–Kolmogorov–Petrovsky–Piskunov equation for the population density and the diffusion equation for the density of the active substance. Both equations contain additional terms describing the mutual influence of the population and the active substance. To find approximate solutions of the system of model equations, we first use the perturbation method with respect to the small parameter of interaction between the population and the active substance. Then we apply the well-known iterative method developed by G. Adomian to solve equations for terms of perturbation series. In the method proposed, the solution is presented as a series whose terms are determined by the corresponding iterative procedure. In this work, the diffusion operator is taken as the operator for which the inverse operator is expressed in terms of the diffusion propagator. This allows one to find the approximate solutions in the class of functions decreasing at infinity. As an illustration, we consider an example of solving the Cauchy problem for the initial functions of a Gaussian form.

KW - Kolmogorov

KW - Petrovsky

KW - Piskunov equation, perturbation theory, Adomian decomposition method

KW - reaction-diffusion model, nonlocal generalized Fisher

UR - http://www.scopus.com/inward/record.url?scp=85073633483&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85073633483&partnerID=8YFLogxK

U2 - 10.1007/s11182-019-01785-x

DO - 10.1007/s11182-019-01785-x

M3 - Article

AN - SCOPUS:85073633483

VL - 62

SP - 835

EP - 847

JO - Russian Physics Journal

JF - Russian Physics Journal

SN - 1064-8887

IS - 5

ER -