Title:        Enhanced velocity mixed finite element methods for flow in 
              multiblock domains

Authors:      John A. Wheeler, Mary F. Wheeler, and Ivan Yotov

Source:       Computational Geosciences 6:3-4 (2002) 315-332

Status:       Published

Abstract: The paper presents a new approach to discretizing flow in
porous media via mixed finite element methods on non-matching
multiblock grids.  The velocity space along the interfaces is enhanced
to give flux-continuous approximation.  No additional matching
conditions need to be imposed. The computational complexity of the
resulting algebraic problem is comparable to the one for the
single-block case. A priori error estimates for the pressure and the
velocity and numerical experiments confirming the theory are
presented.