When the Mesh Skews, the Laplacian Leaks — Non-Orthogonal Diffusion Correction
·5 min read
Splitting the unstructured diffusion term into orthogonal plus correction, three ways
Implicit Diffusion and the Thomas Algorithm — Buying Stability with One Tridiagonal Solve
·4 min read
Past the explicit blow-up wall, the cost of unconditional stability is one O(N) sweep