[CIG-SHORT] 2D Axis-Symmetric Volcanic Model
Charles Williams
willic3 at gmail.com
Tue Nov 13 12:46:20 PST 2012
Scott,
If you're asking if we have an axisymmetric formulation, the answer is no. Thus far, we haven't had a huge demand for this. The primary motivation would be volcanic problems where you have an idealized symmetric volcano (or a real volcano that is very symmetric). To introduce an axisymmetric formulation we would need to write a bunch of new code (similar to what we've done for plane strain/plane stress). There is a radius term in the axisymmetric formulation that complicates things. I guess that if enough people were interested in this we would consider it, but for now I would just see what you can do reducing your domain to a quarter.
Charles
On 14/11/2012, at 8:51 AM, Scott Henderson wrote:
> Hello,
>
> If I am using Pylith to model a central spherical pressure source in a cube the set-up has lots of symmetry (e.g. Mogi model). I know that I can use mirror plane symmetry to run the calculation on a quarter of the full 3D cube (section 8.2.1 in the manual). But is there a way to incorporate an 'axis of symmetry' boundary condition in Pylith. I know commercial packages typically have this to reduce solid of rotation problems to 2D, but from what I understand the implementation is not as simple as assigning traction and displacement boundary conditions along the axis.
>
> -Scott
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Charles A. Williams
Scientist
GNS Science
1 Fairway Drive, Avalon
PO Box 30368
Lower Hutt 5040
New Zealand
ph (office): 0064-4570-4566
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C.Williams at gns.cri.nz
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