[Users] Some quasion about parameter file

[彭兆宏]

Dear Ian,

Sorry for the delay in replying your letter. The following attachment is my
parameter file. I only changed the

ReflectionSymmetry::reflection_z = "no",
CarpetRegrid2::symmetry_rotating180 = "no",
CoordBase::xmin = -120,
CoordBase::zmin = -120,
TwoPunctures::par_S_plus  [2] = 0.10000
TwoPunctures::par_S_minus[0] = 0.10000

Which parameters need to be changed when I used this setup?

Thanks,
                        Alan


2017-03-07 22:48 GMT+08:00 Ian Hinder <ian.hinder at aei.mpg.de>:


On 7 Mar 2017, at 03:21, 彭兆宏 <alanpeng1995 at gmail.com> wrote:

Hi All,

I'm a beginner of Einstein Toolkit. I'm trying to do the binary black hole
with equal mass and no spin. Then, I'm using the
par/arXiv-1111.3344/bbh/BBHLoeRes.par to be the parameter file. It can run
and also generate the gravitational waveform. However, I added the spin and
turned off the symmetry about z-reflection and 180-rotation, it crashed.
What's wrong with this parameter file? What is the difference between
GW150914.rpar file?


Hi Alan,

Can you post the parameter file that fails for you?  Without that, I can
only guess at what is wrong.  Is it possible that when turning off the
symmetry, you didn't change the 'min' coordinates from 0?  What happens if
you just turn off the symmetry, without adding the spin?  It's best to
change only one thing at once, so that you can see which thing causes the
problem.  For aligned spins, you can still use the z symmetry (but not the
180 one).  The GW150914 parameter file is quite different; it uses the
Llama multiblock infrastructure to give high resolution using spherical
grids in the wave zone.  It also uses reflection symmetry.

-- 
Ian Hinder
http://members.aei.mpg.de/ianhin
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