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Diffuse2d.
From: |
dsumpter |
Subject: |
Diffuse2d. |
Date: |
Thu, 30 Jan 1997 19:31:47 GMT |
Hello everyone,
1. I am using a technique similar to Diffuse 2d for the diffusion of
heat and am slightly confused by one aspect. Consider a portion of
lattice with temperatures and first order diffusion:
0
080
0
If the diffusion constant is 1.0 and evaporation rate is 1.0 then the
centre value will update to 0 while the outside values will update to
2. i.e.
2
202
2
This appears somewhat unnatural for heat equations. If the value 8 came
from some source, you would not expect the source to be colder than
the surroundings on the next time step........
Am I right about this? Is there a theoretical explanation?
2. Has anyone got a reference they can give me discussing heat
diffusion in terms of lattices? I'd be very grateful.
Thanks,
David.