Connecting large-scale structures to galaxy morphology
Galactic morphology is driven by angular momentum acquisition through anisotropic secondary infall, coming from larger scales, which are less dense, hence more steady. Cold flows provide the link and leave a clear signature in terms of spin alignment. Galaxies are first aligned and then perpendicular to their host filaments.
This can be explained via Lagrangian theory, which traces back the morphology of galaxies to the ICs.
The spin flip can also be understood in an Eulerian framework while studying the vorticity content of filaments and the effect of mergers.