Nonlinear Sciences – Pattern Formation and Solitons
Scientific paper
2003-12-19
Nonlinear Sciences
Pattern Formation and Solitons
4 pages, 4 eps figures; to appear in Phys. Rev. E
Scientific paper
10.1103/PhysRevE.69.031406
We analyze a recent experiment of Sharon \textit{et al.} (2003) on the coarsening, due to surface tension, of fractal viscous fingering patterns (FVFPs) grown in a radial Hele-Shaw cell. We argue that an unforced Hele-Shaw model, a natural model for that experiment, belongs to the same universality class as model B of phase ordering. Two series of numerical simulations with model B are performed, with the FVFPs grown in the experiment, and with Diffusion Limited Aggregates, as the initial conditions. We observed Lifshitz-Slyozov scaling $t^{1/3}$ at intermediate distances and very slow convergence to this scaling at small distances. Dynamic scale invariance breaks down at large distances.
Conti Massimo
Lipshtat Azi
Meerson Baruch
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