Large-scale structure and the adhesion approximation

The adhesion approximation greatly extends the useful range of the Zel'dovich (quasi-linear) approximation by using artificial viscosity to mimic some of the effects of non-linear gravity. We describe a fast, three-dimensional implementation of the adhesion approximation, compare adhesion simulations to N-body calculations with identical initial conditions, and present results from large simulations with scale-free and cold dark matter (CDM) initial conditions. (author)