The purpose of this paper is to find an effective numerical method for solving singularly perturbed convection-diffusion problems.
The present method is based on the asymptotic expansion method and the variational iteration method (VIM). First a zeroth order asymptotic expansion for the solution of the given singularly perturbed convection-diffusion problem is constructed. Then the reduced terminal value problem is solved by using the VIM.
Two numerical examples are introduced to show the validity of the present method. Obtained numerical results show that the present method can provide very accurate analytical approximate solutions not only in the boundary layer, but also away from the layer.
The combination of the asymptotic expansion method and the VIM is applied to singularly perturbed convection-diffusion problems.
The author would like to express thanks to the unknown referees for their careful reading and helpful comments. This work was sponsored by the National Natural Science Foundation of China (No. 1120104111026200), the Special Funds of the National Natural Science Foundation of China (No. 11141003) and Qing Lan Project of Jiangsu Province.
Geng, F., Qian, S. and Li, S. (2014), "Numerical solutions of singularly perturbed convection-diffusion problems", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 24 No. 6, pp. 1268-1274. https://doi.org/10.1108/HFF-01-2013-0033Download as .RIS
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