This setups reveals a mesh triggered by an sph sim.

This setups cuts shapes out of a basemesh and converts them into inflated balloons.
This setup introduces an age attribut and deletes particles if a certain age is reached. There are two versions. First one is for SPH and just uses the delete node. The second one works for Granular Sims, here a workaround is needed to keep the constraints intact.
Download Scenefile (Granular)
Download Scenefile (SPH)
This setup uses the smoke solver to dissolve an object filled with particles. In another step it creates a new object.
This sim increases the width of particles along a curve and keeps them seperated with the push apart node.
This sim locks particles in place with transform stick and releases them one after another to create a melting effect.