A two field iterated Asymptotic-Preserving method for highly anisotropic elliptic equations - Archive ouverte HAL
Article Dans Une Revue Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal Année : 2019

A two field iterated Asymptotic-Preserving method for highly anisotropic elliptic equations

Résumé

A new two field iterated Asymptotic-Preserving method is introduced for the numerical resolution of strongly anisotropic elliptic equations. This method does not rely on any integration of the field defining the anisotropy. It rather harnesses an auxiliary variable removing any stiffness from the equation. Compared to precedent realizations using the same approach, the iterated method allows for the resolution of each field independently within an iterative process to converge the two unknowns. This brings advantages in the computational efficiency of the method for large meshes, a better scaling of the matrices condition number with respect to the mesh refinement as well as the ability to address complex anisotropy topology including closed field lines.
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Dates et versions

hal-01977920 , version 1 (11-01-2019)

Identifiants

Citer

Fabrice Deluzet, Jacek Narski. A two field iterated Asymptotic-Preserving method for highly anisotropic elliptic equations. Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal, 2019, 17 (1), pp.434-459. ⟨10.1137/17M115205X⟩. ⟨hal-01977920⟩
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