Journal of Computational Physics
Iterative solution methods
The numerical solution of diffusion problems in strongly heterogeneous non-isotropic materials
Journal of Computational Physics
SIAM Journal on Numerical Analysis
Monotonicity of control volume methods
Numerische Mathematik
A Multipoint Flux Mixed Finite Element Method
SIAM Journal on Numerical Analysis
Journal of Computational Physics
A quasi-positive family of continuous Darcy-flux finite-volume schemes with full pressure support
Journal of Computational Physics
SIAM Journal on Scientific Computing
Journal of Computational Physics
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New multifamilies of flux-continuous vertex centered finite-volume methods are presented for the full-tensor pressure equation with general discontinuous coefficients for any cell type in three dimensions. The new schemes are flux continuous with full pressure support over each subcell with continuous pressure imposed across each control-volume subface, in contrast to earlier formulations. Full pressure continuity across subfaces leads to a quasi-positive formulation that minimizes spurious oscillations in discrete pressure solutions for strongly anisotropic full-tensor fields. The multifamily formulation permits maximum flexibility in quadrature, yielding improved solution resolution. The earlier methods are pointwise continuous in pressure and flux with tetrahedral pressure support, which leads to a more limited quadrature range, which is shown to cause spurious oscillations in the solution for strong full-tensor fields. An M-matrix analysis of the three-dimensional schemes identifies bounding limits for the schemes to possess a local discrete maximum principle. Conditions for the schemes to be positive definite are also derived.