We consider the pattern dynamics of the lamellar phases observed in Rayleigh-Bénard convection, as described by the Swift-Hohenberg equation, and in the weak segregation regime of diblock copolymers. Both numerical and analytical investigations show that the dynamical growth of the characteristic length scale in both systems is described by the same growth exponents, thus suggesting that both systems are members of the same universality class.

• Received 3 April 1998

DOI:https://doi.org/10.1103/PhysRevE.58.5364