[overture] Re: ABCs for sm
- From: Bill Henshaw <henshaw@xxxxxxxx>
- To: "overture@xxxxxxxxxxxxx" <overture@xxxxxxxxxxxxx>
- Date: Fri, 27 Jan 2012 11:47:46 -0800
Hi Stefan,
Unfortunately there are no artificial boundary conditions implemented
in cgsm yet :(
(cgsm was built from the cgmx solver which does have ABC's and this
explains why there
are some references to ABC's).
There is both a dissipation parameter and a high order filter that
can be used with
the SOS solver. The "pulse.cmd" examples shows some typical values,
diss=1. and
maybe a fourth or sixth order filter is a good choice.
Regards,
Bill
Stefan Nilsson wrote:
Hi!
I've been playing around with the Sm solver for a while, and now I
have a couple of questions:
Is there any working non-reflecting boundary condition implemented
that works well for the elastodynamic equations. I tried the pmlABC
option but that made the code abort with an STOP 22555 message. I also
tried the abcEM2 which worked but if that really is the Engquist-Majda
condition it wouldn't be optimal for the Sm application, would it? Is
there any other option?
Running the SOS solver, there is a dissipation parameter (default
value 0.0), how does that work with a non-zero value?
/Stefan
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