Volume 79, Number 2, July 2007
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||02 July 2007|
Hydrodynamics and growth laws in lamellar ordering
INFM-CNR, SMC Dipartimento di Fisica Università Roma 1, P.zzle A. Moro 2, 00185 Roma, Italy
2 ISC-CNR, Via dei Taurini 19, 00185 Roma, Italy
3 Istituto Nazionale di Fisica Nucleare, Sezione di Bari - via Amendola 173, Bari, Italy
4 Dipartimento di Fisica, Università di Bari - via Amendola 173, 70126 Bari, Italy
Accepted: 4 June 2007
Ordering of lamellar phases described by a free-energy functional with short-range interactions is numerically investigated in two dimensions by means of a pseudo-spectral method. The ordering process is found to depend on the fluid viscosity: it is arrested for large viscosity values and proceeds as a power law for small ones, with a crossover regime for intermediate values. At varying the free energy parameters, strong evidence has been found that the ordering law, unlike binary mixtures, is not unique.
PACS: 64.75.+g – Solubility, segregation, and mixing; phase separation / 47.54.-r – Pattern selection; pattern formation / 82.35.Jk – Copolymers, phase transitions, structure
© Europhysics Letters Association, 2007
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