How to define constitutive properties (c-coefficient matrix) by element in 3d pdetool

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Sebastián Giusti
Sebastián Giusti 2016-2-29
评论： Sebastián Giusti 2016-2-29
Hi,
I am trying to define the constitutive properties by elements in the 3D version of pdetool. In the 2D versión, the properties of the elements are stored in each column of the c-coefficient matrix. However, when define the c-coefficient matrix in the same way for the 3D versión, I recibe this message:
Error using pde.PDEModel/assema (line 48) The number of columns in the c-coefficient matrix, 63613, is not equal to one.
where 63613 is the number of elements in the mesh.
Any can help??
Thanks in advance.

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Alan Weiss
Alan Weiss 2016-2-29
The details of writing nonconstant coefficients for 3-D geometry are here. The c coefficient can have many different values in the range 1 to 9N^2; see 3-D systems.
Alan Weiss
MATLAB mathematical toolbox documentation

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