We present a study of dynamical scaling and domain growth in a non potential
system that models Rayleigh-Benard convection in a rotating cell. In
d=1, dynamical scaling holds, but the non potential terms
modify the characteristic growth law with a crossover from
logarithmic to linear in time. In d=2 the non potential terms prevent
coarsening for values of the angular rotation speed below the Kuppers-Lortz instability.
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