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[Question #102501]: Best way to specify coefficient fields

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From: Chris Richardson <question102501@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 26 Feb 2010 11:45:10 -0000
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New question #102501 on DOLFIN:
https://answers.launchpad.net/dolfin/+question/102501

What is the best way to specify coefficient fields, e.g. conductivity, permeability, elastic constants ?
I have seen the example "tensor-weighted-poisson" which seems very convoluted.

I am interested in solving Darcy flow with variable permeability k (usually a scalar, but may be a tensor with diagonal entries)...
Also, elastic problems with anisotropic material whose properties vary through space.
There are 9 independent coefficients for elasticity, (out of 81 entries in Cijkl, which relates stress s_ij and strain e_kl).



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