Percolation Theory
Percolation theory deals with fluid flow (or any other similar process) in random media. If the medium is a set of regular lattice points, then there are two main types of percolation: A site percolation considers the lattice vertices as the relevant entities; a bond percolation considers the lattice edges as the relevant entities. These two models are examples of discrete percolation theory, an umbrella term used to describe any percolation model which takes place on a regular point lattice or any other discrete set, and while they're most certainly the most-studied of the discrete models, others such as A B percolation and mixed percolation do exist and are reasonably well-studied in their own right.
AB percolation | Bernoulli percolation model | bond percolation | Boolean model | Boolean-Poisson model | bootstrap percolation | Cayley tree | cluster | cluster perimeter | continuum percolation theory | dependent percolation | discrete percolation theory | disk model | first-passage percolation | germ-grain model | inhomogeneous percolation model | lattice animal | long-range percolation model | mixed percolation model | oriented percolation model | percolation | percolation threshold | polyomino | random-cluster model | random-connection model | random walk | s-cluster | site percolation | s-run
