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  2. Percolation theory - Wikipedia

    en.wikipedia.org/wiki/Percolation_theory

    For site percolation on the square lattice, the value of p c is not known from analytic derivation but only via simulations of large lattices which provide the estimate p c = 0.59274621 ± 0.00000013. [7] A limit case for lattices in high dimensions is given by the Bethe lattice, whose threshold is at p c = ⁠ 1 / z − 1 ⁠ for a ...

  3. Percolation - Wikipedia

    en.wikipedia.org/wiki/Percolation

    Percolation in a square lattice. In physics, chemistry, and materials science, percolation (from Latin percolare 'to filter, trickle through') refers to the movement and filtering of fluids through porous materials. It is described by Darcy's law. Broader applications have since been developed that cover connectivity of many systems modeled as ...

  4. Directed percolation - Wikipedia

    en.wikipedia.org/wiki/Directed_percolation

    In statistical physics, directed percolation (DP) refers to a class of models that mimic filtering of fluids through porous materials along a given direction, due to the effect of gravity. Varying the microscopic connectivity of the pores, these models display a phase transition from a macroscopically permeable (percolating) to an impermeable ...

  5. Percolation threshold - Wikipedia

    en.wikipedia.org/wiki/Percolation_threshold

    The percolation threshold is a mathematical concept in percolation theory that describes the formation of long-range connectivity in random systems. Below the threshold a giant connected component does not exist; while above it, there exists a giant component of the order of system size.

  6. Percolation surface critical behavior - Wikipedia

    en.wikipedia.org/wiki/Percolation_surface...

    Percolation is the study of connectivity in random systems, such as electrical conductivity in random conductor/insulator systems, fluid flow in porous media, gelation in polymer systems, etc. [1] At a critical fraction of connectivity or porosity, long-range connectivity can take place, leading to long-range flow.

  7. First passage percolation - Wikipedia

    en.wikipedia.org/wiki/First_passage_percolation

    First passage percolation is one of the most classical areas of probability theory. It was first introduced by John Hammersley and Dominic Welsh in 1965 as a model of fluid flow in a porous media. [1] It is part of percolation theory, and classical Bernoulli percolation can be viewed as a subset of first passage percolation.

  8. Percolation critical exponents - Wikipedia

    en.wikipedia.org/wiki/Percolation_critical_exponents

    The exponents are universal in the sense that they only depend on the type of percolation model and on the space dimension. They are expected to not depend on microscopic details such as the lattice structure, or whether site or bond percolation is considered. This article deals with the critical exponents of random percolation.

  9. Interface force field - Wikipedia

    en.wikipedia.org/wiki/Interface_force_field

    In the context of chemistry and molecular modelling, the Interface force field (IFF) is a force field for classical molecular simulations of atoms, molecules, and assemblies up to the large nanometer scale, covering compounds from across the periodic table. [1]