[aspect-devel] Aspect-devel Digest, Vol 12, Issue 3

[Wolfgang Bangerth]

On 11/15/2012 03:59 PM, Ian Rose wrote:
> Problem (probably) solved.
>
> The lower boundary, having a smaller surface area, requires a thinner
> boundary layer to keep up with the heat flux out of the top boundary.
> If you run at too low a resolution (as I was), then the temperature
> gradient at the bottom is too shallow due to numerical diffusion and you
> significantly underestimate the lower  heat flux.

Wow, by a factor of 4? Then, anyway, glad you found what looks like the 
reason.

Best
  W.

-- 
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Wolfgang Bangerth               email:            bangerth at math.tamu.edu
                                 www: http://www.math.tamu.edu/~bangerth/