[Users] Meeting Minutes

[Roland Haas]

Present: Frank, Roland, Erik, Steve, Peter, Zach, Vassilli, Matt,
Philipp, Ian

Run issues:
Vassilli sees decrease in irreducible mass in his runs at at time after
the initial junk should have passed. Increase is a bout 4-5%, suggest to
check increasing resolution globally to verify if effect is physics or
numerics.

Examples:
* Roland tried NsNs purely Cartesian run, sees NaN after about 50M, will
test if NaN is also present in the original multipatch run of comparable
resolution
* Peter to dig up parfile and runtime/memory estimates for bbh runs

IllinoisGRMHD:
* Zach to give a code walkthrough next week in the ET call
* will use BigBlueButton for this (http://horizon.tapir.caltech.edu for
a test video), Roland will test that this works beforehand

Ps4 mode decomposition:
* Jim Healy sees some odd behaviour in 2,1 mode of psi4 when using
Multipole thorn but not when using old GT mode decomposition thorn
* mode that is expected to be zero is not and leads to BH kick
* run uses rotatingsymmetry180 and reflectionsymmetry (in z direction)
* no physics change in multipole since Oersted release
* suggest running in full mode
* will work with Jim for a while then possibly take issue to mailing
list again

Yours,
Roland









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