2.5. Simple diffusion equation

This example solves a simple diffusion equation in two dimensions.

  0%|          | 0/10.0 [00:00<?, ?it/s]
Initializing:   0%|          | 0/10.0 [00:00<?, ?it/s]
  0%|          | 0/10.0 [00:07<?, ?it/s]
  0%|          | 0.00367/10.0 [00:07<5:36:45, 2021.25s/it]
  1%|          | 0.08096/10.0 [00:07<15:09, 91.70s/it]
 11%|#         | 1.09502/10.0 [00:07<01:00,  6.78s/it]
 11%|#         | 1.09502/10.0 [00:07<01:00,  6.79s/it]
100%|##########| 10.0/10.0 [00:07<00:00,  1.34it/s]
100%|##########| 10.0/10.0 [00:07<00:00,  1.34it/s]

from pde import DiffusionPDE, ScalarField, UnitGrid

grid = UnitGrid([64, 64])  # generate grid
state = ScalarField.random_uniform(grid, 0.2, 0.3)  # generate initial condition

eq = DiffusionPDE(diffusivity=0.1)  # define the pde
result = eq.solve(state, t_range=10)
result.plot()