[aspect-devel] Question on layered and temperature-dependent viscosities

[Wolfgang Bangerth]

On 05/16/2018 09:59 AM, FELIPE ORELLANA ROVIROSA wrote:
> 
>     It is based on position:
> 
>     subsection Depth dependent model
> 
>      set Base model = simple
>      set Depth dependence method = List # Function
>      set Depth list = 1e6, 2.9e6
>      set Viscosity list = 1e20, 1e22

Then the viscosity is determined exclusively based on the position ("which 
layer are you in") and the temperature a material happens to have at a 
particular location. Where that material came from originally is not relevant 
for the determination of the viscosity -- the material model does not know 
this, nor does it care.

There are ways to tell a material model where material came from, and to base 
the viscosity also on this information. You would do this with compositional 
fields.

Best
  W.

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