  We develop a velocity-dependent one-scale model for the evolution of domain
wall networks in flat expanding or collapsing homogeneous and isotropic
universes with an arbitrary number of spatial dimensions, finding the
corresponding scaling laws in frictionless and friction dominated regimes. We
also determine the allowed range of values of the curvature parameter and the
expansion exponent for which a linear scaling solution is possible in the
frictionless regime.

High Energy Physics - Theory;Cosmology and Nongalactic Astrophysics;General Relativity and Quantum Cosmology;High Energy Physics - Phenomenology