Fitted mesh method for singularly perturbed reaction-convection-diffusion problems with boundary and interior layers

2006 ◽  
Vol 22 (1-2) ◽  
pp. 49-65 ◽  
Author(s):  
V. Shanthi ◽  
N. Ramanujam ◽  
S. Natesan
Keyword(s):  
Singularly Perturbed ◽  
Convection Diffusion ◽  
Mesh Method ◽  
Interior Layers ◽  
Boundary And Interior Layers ◽  
Diffusion Problems

scholarly journals Singularly perturbed convection–diffusion problems with boundary and weak interior layers

2004 ◽  
Vol 166 (1) ◽  
pp. 133-151 ◽  
Author(s):  
P.A. Farrell ◽  
A.F. Hegarty ◽  
J.J.H. Miller ◽  
E. O'Riordan ◽  
G.I. Shishkin
Keyword(s):  
Singularly Perturbed ◽  
Convection Diffusion ◽  
Interior Layers ◽  
Diffusion Problems

scholarly journals Numerical solutions of a system of singularly perturbed reaction-diffusion problems

Filomat ◽  
2019 ◽  
Vol 33 (15) ◽  
pp. 4889-4905
Author(s):  
Ali Barati ◽  
Ali Atabaigi
Keyword(s):  
Numerical Solutions ◽  
Reaction Diffusion ◽  
Coupled System ◽  
Approximate Solutions ◽  
Perturbation Parameter ◽  
Reaction Diffusion Equations ◽  
Singularly Perturbed ◽  
Interior Layers ◽  
Boundary And Interior Layers ◽  
Diffusion Problems

This paper addresses the numerical approximation of solutions to a coupled system of singularly perturbed reaction-diffusion equations. The components of the solution exhibit overlapping boundary and interior layers. Sinc procedure can control the oscillations in computed solutions at boundary layer regions naturally because the distribution of Sinc points is denser at near the boundaries. Also the obtained results show that the proposed method is applicable even for small perturbation parameter as ? = 2-30. The convergence analysis of proposed technique is discussed, it is shown that the approximate solutions converge to the exact solutions at an exponential rate. Numerical experiments are carried out to demonstrate the accuracy and efficiency of the method.

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