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a small doubt with the 'patching method'

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Old   April 26, 2011, 11:36
Default a small doubt with the 'patching method'
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Iīve been working in the cooling of an iron cube in a molten salt bath, and by advice from someone here, I used the patching method to put the two volumes at different temperatures.

The problem is that the two volumes donīt interact at all if I donīt specify boundary conditions (which I donīt want to impose to see how the cooling develops). So, am I doing something wrong, or it canīt be done without specifying boundary conditions?

Thanks in advandce
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