A meshless simulations for 2D nonlinear reaction-diffusion brusselator system

This paper is concerned with the development of a numerical approach based on the Meshless Local Petrov-Galerkin (MLPG) method for the approximate solutions of the two dimensional nonlinear reaction-diffusion Brusselator systems. The method uses finite differences for discretizing the time variable and the moving least squares (MLS) approximation for field variables. The application of the weak formulation with the Heaviside type test functions supported on local subdomains (around the nodes used in MLS approximation) to semi-discretized partial differential equations yields the finite-volume local weak formulation. A predictor-corrector scheme is used to handle the nonlinearity of the problem within each time step. Numerical test problems are given to verify the accuracy of the proposed method. Under particular conditions, this system exhibits Turing instability which results in a pattern forming instability. This concept is studied and a test problem is given. © 2013 Tech Science Press.