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Analysis and discretization of the volume penalized Laplace operator with Neumann boundary conditions

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arxiv 1403.5948 v2 pith:SDBWFR62 submitted 2014-03-24 math.NA cs.NAphysics.comp-ph

Analysis and discretization of the volume penalized Laplace operator with Neumann boundary conditions

classification math.NA cs.NAphysics.comp-ph
keywords boundaryconditionsneumannequationlaplaceoperatorpenalizationpenalized
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the properties of an approximation of the Laplace operator with Neumann boundary conditions using volume penalization. For the one-dimensional Poisson equation we compute explicitly the exact solution of the penalized equation and quantify the penalization error. Numerical simulations using finite differences allow then to assess the discretisation and penalization errors. The eigenvalue problem of the penalized Laplace operator with Neumann boundary conditions is also studied. As examples in two space dimensions, we consider a Poisson equation with Neumann boundary conditions in rectangular and circular domains.

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