[aspect-devel] questions about heat flux output

[Bremner,Paul M]

Dear All,


I'm new to ASPECT, and I've been running the cookbook parameter files to get started. I'm sure this is very basic, but while running the shell_simple_2d.prm I noticed that the heat flux values through the inner and outer boundaries are only in the megawatts range, and the inner boundary even has a negative value, and this appears at every time step. The final animation of the temperature parameter from the solutions files look completely normal, though. In the case of the shell_simple_2d.prm, the inner and outer boundaries have fixed temperatures, 4273K and 973K, respectively, and the inner boundary is a rigid surface.


My question is; what do these values actually represent? They seem too small (and the negative values seem strange) to be the actual heat flux values. Are these perturbation values, or are the units not what I think they are?


Thank you in advance,

Paul Bremner
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