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arXiv · 2002.09694

A New Family of Boundary-Domain Integral Equations for the Dirichlet Problem of the Diffusion Equation in Inhomogeneous Media with $H^{-1}(Ω)$ Source Term on Lipschitz Domains

C. Fresneda-Portillo·Z. W. Woldemicheal
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Abstract

The interior Dirichlet boundary value problem for the diffusion equation in non-homogeneous media is reduced to a system of Boundary-Domain Integral Equations (BDIEs) employing the parametrix obtained in (Fresneda-Portillo, 2019) different from (Chkadua et. al 2009). We further extend the results obtained in (Fresneda-Portillo, 2019) for the mixed problem in a smooth domain with $L^{2}(Ω)$ right hand side to Lipschitz domains and source term $f$ in the Sobolev space $H^{-1}(Ω)$, where neither the classical nor the canonical co-normal derivatives are well defined. Equivalence between the system of BDIEs and the original BVP is proved along with their solvability and solution uniqueness in appropriate Sobolev spaces.

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C. Fresneda-Portillo, Z. W. Woldemicheal. 2020-02-22. A New Family of Boundary-Domain Integral Equations for the Dirichlet Problem of the Diffusion Equation in Inhomogeneous Media with $H^{-1}(Ω)$ Source Term on Lipschitz Domains. https://doi.org/10.1002/mma.6659

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