  We consider effective models of condensation where the condensation occurs as
time t goes to infinity. We provide natural conditions under which the build-up
of the condensate occurs on a spatial scale of 1/t and has the universal form
of a Gamma density. The exponential parameter of this density is determined
only by the equation and the total mass of the condensate, while the power law
parameter may in addition depend on the decay properties of the initial
condition near the condensation point. We apply our results to some examples,
including simple models of Bose-Einstein condensation.
