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Runge-Kutta and hermite collocation for a biological invasion problem modeled by a generalized fischer equation

Saridakis Ioannis, Papadopoulou Eleni, Athanasakis Ioannis

Πλήρης Εγγραφή

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Περίληψη

Fisher’s equation has been widely used to model the biological invasion of single- species communities in homogeneous one dimensional habitats. In this study we develop high order numerical methods to accurately capture the spatiotemporal dynamics of the generalized Fisher equation, a nonlinear reaction-diffusion equation characterized by density dependent non-linear diffusion. Working towards this direction we consider strong stability preserving Runge-Kutta (RK) temporal discretization schemes coupled with the Hermite cubic Collocation (HC) spatial discretization method. We investigate their convergence and stability properties to reveal efficient HC-RK pairs for the numerical treatment of the generalized Fisher equation. The Hadamard product is used to characterize the collocation discretized non linear equation terms as a first step for the treatment of generalized systems of relevant equations. Numerical experimentation is included to demonstrate the performance of the methods.

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