Premium
Numerical treatment of two‐parameter singularly perturbed parabolic convection diffusion problems with non‐smooth data
Author(s) -
Chandru M.,
Das P.,
Ramos H.
Publication year - 2018
Publication title -
mathematical methods in the applied sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.719
H-Index - 65
eISSN - 1099-1476
pISSN - 0170-4214
DOI - 10.1002/mma.5067
Subject(s) - mathematics , convection–diffusion equation , mathematical analysis , perturbation (astronomy) , discontinuity (linguistics) , partial differential equation , piecewise , uniform convergence , numerical analysis , parabolic partial differential equation , convection , mechanics , physics , radius , computer security , quantum mechanics , computer science
In the present work, we consider a parabolic convection‐diffusion‐reaction problem where the diffusion and convection terms are multiplied by two small parameters, respectively. In addition, we assume that the convection coefficient and the source term of the partial differential equation have a jump discontinuity. The presence of perturbation parameters leads to the boundary and interior layers phenomena whose appropriate numerical approximation is the main goal of this paper. We have developed a uniform numerical method, which converges almost linearly in space and time on a piecewise uniform space adaptive Shishkin‐type mesh and uniform mesh in time. Error tables based on several examples show the convergence of the numerical solutions. In addition, several numerical simulations are presented to show the effectiveness of resolving layer behavior and their locations.