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Strongly Coupled Dark Energy plus Warm dark matter (SCDEW) cosmologies admitthe stationary presence of $\sim 1\, \%$ of coupled-DM and DE, sinceinflationary reheating. Coupled-DM fluctuations therefore grow up tonon-linearity even in the early radiative expansion. Such early non-linearstages are modelized here through the evolution of a top-hat densityenhancement, reaching an early virial balance when the coupled-DM densitycontrast is just 25-26 and DM density enhancement is $ \sim 10\, \%$ of totaldensity. During the time needed to settle in virial equilibium, the virialbalance conditions however continue to modify, so that "virialized" lumpsundergo a complete evaporation. Here we outline that DM particles processed byoverdentities preserve a fraction of their virial momentum. Although fullynon-relativistic, the resulting velocities (moderately) affect the fluctuationdynamics over greater scales, entering the horizon later on.

Coupled DM heating in SCDEW cosmologies