  Large-scale structure formation can be modeled as a nonlinear process that
transfers energy from the largest scales to successively smaller scales until
it is dissipated, in analogy with Kolmogorov's cascade model of incompressible
turbulence. However, cosmic turbulence is very compressible, and vorticity
plays a secondary role in it. The simplest model of cosmic turbulence is the
adhesion model, which can be studied perturbatively or adapting to it
Kolmogorov's non-perturbative approach to incompressible turbulence. This
approach leads to observationally testable predictions, e.g., to the power-law
exponent of the matter density two-point correlation function.
