Last month saw the release of V15.18, the latest version of Gridgen software for computational fluid dynamics (CFD) mesh generation. Gridgen V15.18 is said to increase the recovery of prism cells from the layers of extruded tetrahedra in the boundary layer. It offers the option to use a Green-Gauss formulation for computing prism volume that is “more forgiving” than the default formulation, and includes two improvements to the algorithm’s ability to smoothly extrude more tetrahedral layers from concave regions. V15.18 also includes several “bug” fixes and other features. — Pointwise, Inc., Fort Worth, Tex.