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Free Computational Fluid Dynamics
STÈPHANE POPINET              hat is Gerris? Named after the
Gerris remigis or common              • Extensible: re-usable
library             water strider, Gerris is yet another tool
for computational            design (with language-agnostic
fluid dynamics. Three years ago, I started working on a new
bindings), dynamically-linked numerical technique for the
solution of flows with fluid/fluid inter-              extension
modules faces (e.g. droplets, bubbles, waves etc.) in three
dimensions. I had sev-
• Portable and parallel: eral choices: I could carry on using
the D and D research codes I had            programmed in C,
MPI used and developed for several years, I could try