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Enhanced Unconditionally Positive Finite Difference Method for Advection–Diffusion–Reaction Equations
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Enhanced Unconditionally Positive Finite Difference Method for Advection–Diffusion–Reaction Equations
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Journal Article
Enhanced Unconditionally Positive Finite Difference Method for Advection–Diffusion–Reaction Equations
2022
Overview
In this study, we develop the enhanced unconditionally positive finite difference method (EUPFD), and use it to solve linear and nonlinear advection–diffusion–reaction (ADR) equations. This method incorporates the proper orthogonal decomposition technique to the unconditionally positive finite difference method (UPFD) to reduce the degree of freedom of the ADR equations. We investigate the efficiency and effectiveness of the proposed method by checking the error, convergence rate, and computational time that the method takes to converge to the exact solution. Solutions obtained by the EUPFD were compared with the exact solutions for validation purposes. The agreement between the solutions means the proposed method effectively solved the ADR equations. The numerical results show that the proposed method greatly improves computational efficiency without a significant loss in accuracy for solving linear and nonlinear ADR equations.
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