A Wall the Grid Never Sees — IBM Delta Kernels and Multi-Direct Forcing
·8 min read
The two places no-slip leaks out of a forcing-term wall
A Heart Valve Without a Body-Fitted Mesh — Peskin's Immersed Boundary Method and the Discrete Delta
·5 min read
How to put a moving body into a fluid without ever remeshing — one regularized delta function does the work