A two-grid method for expanded mixed finite-element solution of semilinear reaction-diffusion equations

2003 ◽  
Vol 57 (2) ◽  
pp. 193-209 ◽  
Author(s):  
Yanping Chen ◽  
Yunqing Huang ◽  
Dehao Yu
Keyword(s):  
Finite Element ◽  
Mixed Finite Element ◽  
Grid Method ◽  
Reaction Diffusion ◽  
Reaction Diffusion Equations ◽  
Diffusion Equations ◽  
Finite Element Solution ◽  
Element Solution ◽  
Expanded Mixed Finite Element

A New Two-Grid Method for Expanded Mixed Finite Element Solution of Nonlinear Reaction Diffusion Equations

2017 ◽  
Vol 9 (3) ◽  
pp. 757-774 ◽  
Author(s):  
Shang Liu ◽  
Yanping Chen
Keyword(s):  
Finite Element ◽  
Mixed Finite Element ◽  
Grid Method ◽  
Reaction Diffusion ◽  
Reaction Diffusion Equations ◽  
Diffusion Equations ◽  
Reaction Diffusion Equation ◽  
Nonlinear Reaction ◽  
Expanded Mixed Finite Element ◽  
Coarse Space

AbstractIn the paper, we present an efficient two-grid method for the approximation of two-dimensional nonlinear reaction-diffusion equations using a expanded mixed finite-element method. We transfer the nonlinear reaction diffusion equation into first order nonlinear equations. The solution of the nonlinear system on the fine space is reduced to the solutions of two small (one linear and one non-linear) systems on the coarse space and a linear system on the fine space. Moreover, we obtain the error estimation for the two-grid algorithm. It is showed that coarse space can be extremely coarse and achieve asymptotically optimal approximation as long as the mesh sizes satisfy. An numerical example is also given to illustrate the effectiveness of the algorithm.

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