Dye advection, CPM, cell centered, WENO interpolation

The slide below includes a youtube video using cell centered dye advection with the closest point method on the swish-swirl dataset. As you can see, this is not mass preserving. Previously, the dye was not cell centered and would not advect through.

It should be noted though that I don’t believe this dataset is mass preserving. So, its a bit weird to treat it as such. Never the less, think the next step is either finite volume or do directly to Eulerian.