The uniform convergence of upwind schemes on layer-adapted meshes for a singularly perturbed Robin BVP

In this paper, we discuss the uniform convergence of the simple upwind scheme on the Shishkin mesh and the Bakhvalov-Shishkin mesh for solving a singularly perturbed Robin boundary value problem, and investigate the midpoint upwind scheme on the Shishkin mesh and the Bakhvalov-Shishkin mesh to achieve better uniform convergence. The elaborate ε-uniform pointwise estimates are proved by using the comparison principle and barrier functions. The numerical experiments support the theoretical results for the schemes on the meshes.

中点迎风差分格式在Bakhvalov-Shishkin网格上的注记

研究具有单一边界层的奇异摄动两点边界值问题 ,在 Bakhvalov- Shishkin网格上构造了中点迎风差分格式 ,并且证明了该差分格式具有 O(N-1)关于摄动参数ε一致的收敛阶 ,其中 N为网格结点数 .