Abstract
We have measured the coarsening due to surface tension of radially grown fractal viscous fingering patterns. The patterns at late times depend on the structural form at the onset of coarsening, providing information on the age of the fractal. The coarsening process is not dynamically scale invariant, exhibiting two dynamic length scales that grow as and . The measured exponents are in agreement with the results of recent numerical studies of diffusion-controlled coarsening of a diffusion-limited aggregation fractal [Lipshtat et al., Phys. Rev. E 65, 050501 (2002)].
- Received 25 April 2003
DOI:https://doi.org/10.1103/PhysRevLett.91.205504
©2003 American Physical Society