A New Time Discontinuous Expanded Mixed Element Method for Convection-dominated Diffusion Equation

In this paper, a new time discontinuous expanded mixed finite element method is proposed and analyzed for two-order convection-dominated diffusion problem. The proofs of the stability of the proposed scheme and the uniqueness of the discrete solution are given. Moreover, the error estimates of the scalar unknown, its gradient and its flux in the L1( ¯ J,L2( )-norm are obtained.

• Jinfeng Wang
• Yuanhong Bi
• Hong Li
• Yang Liu
• Meng Zhao

• Convection-dominated diffusion equation
• expanded mixed method
• time discontinuous scheme
• stability
• error estimates.

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