Geodesic
Numerical analysis of a Stokes interface problem based on formulation using the characteristic function
Applications of Mathematics, Tome 62 (2017) no. 5, pp. 459-476.

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Numerical analysis of a model Stokes interface problem with the homogeneous Dirichlet boundary condition is considered. The interface condition is interpreted as an additional singular force field to the Stokes equations using the characteristic function. The finite element method is applied after introducing a regularization of the singular source term. Consequently, the error is divided into the regularization and discretization parts which are studied separately. As a result, error estimates of order $h^{1/2}$ in $H^1\times L^2$ norm for the velocity and pressure, and of order $h$ in $L^2$ norm for the velocity are derived. Those theoretical results are also verified by numerical examples.
DOI : 10.21136/AM.2017.0357-16
Classification : 65N15, 65N30, 74A50, 74F10, 76D07
Keywords: interface problem; Stokes equation; finite element method 
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     title = {Numerical analysis of a {Stokes} interface problem based on formulation using the characteristic function},
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Sugitani, Yoshiki. Numerical analysis of a Stokes interface problem based on formulation using the characteristic function. Applications of Mathematics, Tome 62 (2017) no. 5, pp. 459-476. doi : 10.21136/AM.2017.0357-16. http://geodesic.mathdoc.fr/articles/10.21136/AM.2017.0357-16/

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