Abstract
A second-order difference scheme for a first-order elliptic system with discontinuous coefficients is derived and studied. This approximation can be viewed as an improvement of the well-known scheme with harmonic averaging of the coefficients for a second order elliptic equation, which is first-order accurate for the gradient of the solution. The numerical experiments confirm the second order convergence for the scaled gradient, and demonstrate the advantages of the new discretization, compared with the older ones.
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© 2000 Springer-Verlag Berlin Heidelberg
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Chernogorova, T., Ewing, R.E., Iliev, O., Lazarov, R. (2000). On the Discretization of Interface Problems with Perfect and Imperfect Contact. In: Chen, Z., Ewing, R.E., Shi, ZC. (eds) Numerical Treatment of Multiphase Flows in Porous Media. Lecture Notes in Physics, vol 552. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45467-5_7
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DOI: https://doi.org/10.1007/3-540-45467-5_7
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