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• W2890910775 abstract "We present a general framework for accurately evaluating finite difference operators in the presence of known discontinuities across an interface. Using these techniques, we develop simple-to-implement, second-order accurate methods for elliptic problems with interfacial discontinuities and for the incompressible Navier-Stokes equations with singular forces. To do so, we first establish an expression relating the derivatives being evaluated, the finite difference stencil, and a compact extrapolation of the jump conditions. By representing the interface with a level set function, we show that this extrapolation can be constructed using dimension- and coordinate-independent normal Taylor expansions with arbitrary order of accuracy. Our method is robust to non-smooth geometry, permits the use of symmetric positive-definite solvers for elliptic equations, and also works in 3D with only a change in finite difference stencil. We rigorously establish the convergence properties of the method and present extensive numerical results. In particular, we show that our method is second-order accurate for the incompressible Navier-Stokes equations with surface tension." @default.
• W2890910775 created "2018-09-27" @default.
• W2890910775 creator A5054516411 @default.
• W2890910775 date "2015-01-01" @default.
• W2890910775 modified "2023-09-23" @default.
• W2890910775 title "The Jump Splice for Elliptic Interface Problems and the Incompressible Navier-Stokes Equations" @default.
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• W2890910775 hasPublicationYear "2015" @default.
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