We present simulations of a model for the formation of a prominence condens
ation in a coronal loop. The key idea behind the model is that the spatial
localization of loop heating near the chromosphere leads to a catastrophic
cooling in the corona. Using a new adaptive grid code, we simulate the comp
lete growth of a condensation and find that after similar to 5000 s it reac
hes a quasi-steady state. We show that the size and growth time of the cond
ensation are in good agreement with data and discuss the implications of th
e model for coronal heating and for observations of prominences and the sur
rounding corona.