[CIG-MAGMA] SpecRidge: Spectral Pressure Ridge Benchmark
Marc Spiegelman
mspieg at ldeo.columbia.edu
Fri Mar 16 10:25:22 PDT 2007
Dear fellow Magma-tists...
If you are interested, I have recently put together 2 and 3-D
cartesian spectral codes (in matlab) for calculating pressure and
velocity for iso-viscous, incompressible stokes relevant for mid-ocean
ridge calculations (e.g. Phipps Morgan and Forsyth, 1988, Spiegelman,
1996).
This solution was developed to be used as an initial benchmark for
FEM, FD and FV codes that may be used for solid solvers for
magma-dynamics. In particular, we need to understand the accuracy of
the pressure fields (and pressure gradients) produced by available
solid-flow codes to understand what techniques will be useful for
accurate magma codes. For sufficiently smooth boundary conditions, the
spectral codes are effectively analytic solutions.
I am attaching a pdf of the documentation and gzipped tar file of the
mercurial repository that I'm keeping this all under.
The next steps are to define specific benchmark calculations, and a
list of codes we would like to test. All comments, suggestions are
greatly appreciated and should be posted to cig-magma at geodynamics.org
Hope this is useful
cheers
marc
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Marc Spiegelman
Lamont-Doherty Earth Observatory &
Dept. of Applied Physics/Applied Mathematics
Columbia University
http://www.ldeo.columbia.edu/~mspieg
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p.s. The latest version of the repository can be downloaded using
mercurial (http://www.selenic.com/mercurial/wiki/) which is a python
based distributed version control system.
once mercurial is installed try either
hg clone
http://www.ldeo.columbia.edu/cgi-bin/mspieg-cgi-bin/hgSpecRidge.cgi
SpecRidge
or from within an existing SpecRidge repository
hg pull
http://www.ldeo.columbia.edu/cgi-bin/mspieg-cgi-bin/hgSpecRidge.cgi
the nitty gritty changelog can be viewed through your browser at
http://www.ldeo.columbia.edu/cgi-bin/mspieg-cgi-bin/hgSpecRidge.cgi
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