Giving every species its own tau threw the total mass off by 16.8% — correction velocity in multicomponent LBM
·8 min read
Different taus make Fick fluxes miss zero. Over 2000 steps a three-species LBM drops the worst mass defect from 0.168 to 0.0005.
202x More Scalar Dissipation, 13% Less Temperature — Where a Laminar Flamelet Quenches
·7 min read
Scalar dissipation rose 202-fold while peak temperature fell only 13%, then the burning solution vanished. Python pins that quench limit.
When the Mesh Skews, the Laplacian Leaks — Non-Orthogonal Diffusion Correction
·5 min read
The face-area vector splits into an implicit piece and a deferred correction. Minimum correction hits ratio 1 at 45 degrees and stops contracting.
Implicit Diffusion and the Thomas Algorithm — Buying Stability with One Tridiagonal Solve
·6 min read
At r=0.6 explicit diffusion reaches 1e12 in 60 steps. One Thomas sweep keeps the implicit update finite at that same r, and still finite at r=2.