Adds the blob test to examples/HydroTests/BlobTest_3D

This MR adds the infamous blob test from Agertz+2007.

It includes a moving making script, IC script, and a readme.

Here's how various SWIFT schemes perform at high resolution:

blob_256

I could probably work more on this but I think we're at the 80% stage here, and the improvements are required more on the swiftsimio side.

changed the description

added enhancement SPH labels

changed milestone to %Add ANARCHY-SPH

Thanks.

I like the word of caution. Should you add something about the resolution difference from Agertz+ ?

added 1 commit

• 75971672 - README updates mentioning resolution

Compare with previous version

I've added that.

Thanks. Cool stuff.

merged

mentioned in commit 602ad119