"A large part of the intense fundamental interest in percolation is due to the fact that percolation is like a phase transition, in the sense that there ..."
"The ball moving through the pins is similar to water moving through a solid medium" The video is a pretty good visual display.
The movement of water or any other small molecule through a polymer is kinda like the movement of small meatballs in a big bowl of spaghetti. In this here analogy, the meatballs are water and the spaghetti are the polymers. This analogy maybe only relevant for polymers.
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.