Obstacles
(i.e. no preference)
ILG simulation on a 128x512 lattice, particle density of 0.7, obstacles with 25% coverage. The system has periodic boundary conditions and momentum is injected at a constant rate on the left boundary of the system. Red particles that leave the system re-enter the system on the left side as blue particles. The pressure drop accross the system is P=1.96, which corresponds to an input of 1.7 units of momentum per vertical site (rather high pressure).
The "annealed" obstacles come from a previous phase-separation simulation in which the low concentration phase (27%, annealed for t=500 steps) was saved in a file to serve as obstacles for the present simulation.
Each picture below represents a DIFFERENT simulation realization. The variable is the "wettability" of the obstacles. Otherwise, all of the other parameters are the same. Note how as the obstacles become red-philic, there is an increasing fingering pattern penetration in the blue. Also, as the obstacles become more red-philic, the blue is LESS effective in pushing surrounding red, thus obstacles are left covered with a red lining.
(Clickable pictures that bring up animated gifs of the simulation)
| 100% Blue Obstacles |
90% Blue | 80% Blue | 70% Blue | 60% Blue | 50-50 Blue/Red (i.e. no preference) |
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| 60% Red | 70% Red | 80% Red | 90% Red | 100% Red | |
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