[Users] error after activating IllinoisGRMHD and VolumeIntegrals_GRMHD

Tue Jul 17 09:18:29 CDT 2018

Dear Zach,
It seems that none parameter file in https://bitbucket.org/zach_etienne/wvuthorns_diagnostics/src/a7dfd31684ba/Meudon_Bin_NS-modified/par/?at=master uses VolumeIntegrals_GRMHD but use VolumeIntegrals instead. Does this mean that I should update the parameter file in order to use them ?
My main goal is to simulate binary neutron star with unequal mass, and I have already produced some initial data by LORENE. It seems now I have two options. First is to modify (update) one of the parameter files above(e.g. nsns_test.par ) and second is significantly modify nsnstohmns.par in the gallery. Can I consult for your suggestion that which method would be more efficient and proper without tracking problem? Or there are other possible solution?

Thank you.
Best regards,
Chia-Hui
________________________________
寄件者: Zach Etienne <zachetie at gmail.com>
寄件日期: 2018年7月17日 下午 09:53:20
收件者: 林家暉
副本: Einstein Toolkit Users
主旨: Re: [Users] error after activating IllinoisGRMHD and VolumeIntegrals_GRMHD

Dear Chia-Hui,

> Is there a thorn called VolumeIntegrals ?

No, there isn't, and this *might* be evidence that the parameter file you chose is outdated (try to find one that depends on VolumeIntegrals_GRMHD): the old "VolumeIntegrals" thorn was split into the VolumeIntegrals_GRMHD and VolumeIntegrals_vacuum thorns. The former can use IllinoisGRMHD gridfunctions and the latter can use McLachlan gridfunctions. VolumeIntegrals_GRMHD is used to find the center of masses of the neutron stars so their motion can be tracked by the AMR grids.

> And I am curious about: what is the main difference between the parameter file (nsnstohmns.par) in the gallery example and nsns_test.par ?

The nsns_test.par is designed to evolve the "Missing Link" case (https://arxiv.org/abs/1101.4298), which is probably different than the gallery example. To run this case, you'll need to use the LORENE initial data file here (credit: Meudon group; you can find this case on the LORENE website -- https://lorene.obspm.fr/ -- as well, but you'll need to hunt for it):
http://math.wvu.edu/~zetienne/resu.d

-Zach

*     *     *
Zachariah Etienne
Assistant Professor of Mathematics
West Virginia University
https://math.wvu.edu/~zetienne/
https://blackholesathome.net

On Tue, Jul 17, 2018 at 9:26 AM, 林家暉 <r06222015 at ntu.edu.tw<mailto:r06222015 at ntu.edu.tw>> wrote:

Dear Zach,

Sorry for late reply. I have tried one of the parameter file you mentioned ( nsns_test.par ). I have a question for this file that the thorn VolumeIntegrals should be activated but I can only find VolumeIntegrals_GRMHD  and VolumeIntegrals_vacuum. After I tried both thorns, I chose VolumeIntegrals_GRMHD(that is, I change all VolumeIntegrals into VolumeIntegrals_GRMHD in the nsns_test.par).However the code stopped after several minutes running. So what I want to ask is: Is there a thorn called VolumeIntegrals ? Since I cannot find after searching and I think it is the reason terminating the code.

And I am curious about: what is the main difference between the parameter file (nsnstohmns.par) in the gallery example and nsns_test.par ?

Thank you.

Best regards,

Chia-Hui

________________________________
寄件者: Zach Etienne <zachetie at gmail.com<mailto:zachetie at gmail.com>>
寄件日期: 2018年7月14日 上午 02:41:24

收件者: 林家暉
副本: Einstein Toolkit Users
主旨: Re: [Users] error after activating IllinoisGRMHD and VolumeIntegrals_GRMHD

Hi Chia-Hui,

If you really want to use VolumeIntegrals_GRMHD, you are more than welcome to do so. However, the parameter file you are using from the examples gallery will need to be significantly modified to be compatible with IllinoisGRMHD. My immediate thought (which may be correct or incorrect) is that it is attempting to initialize both GRHydro and IllinoisGRMHD simultaneously.

If you want to use IllinoisGRMHD, the easiest route would be to start with a parameter file in the following wvuthorns_diagnostics directory:
https://bitbucket.org/zach_etienne/wvuthorns_diagnostics/src/master/Meudon_Bin_NS-modified/par/

I haven't had time yet to fully set up a gallery example for this BNS case, so beware: you may need to modify the parameter file a bit to make it work properly. I'm hoping to schedule the next IllinoisGRMHD Working Group telecon in the next few weeks, so please stay tuned if you are interested.

-Zach

*     *     *
Zachariah Etienne
Assistant Professor of Mathematics
West Virginia University
http://math.wvu.edu/~zetienne/
http://blackholesathome.net

On Fri, Jul 13, 2018 at 11:50 AM, 林家暉 <r06222015 at ntu.edu.tw<mailto:r06222015 at ntu.edu.tw>> wrote:
Dear Zach,
Becasue if I only activate VolumeIntegrals_GRMHD but not IllinoisGRMHD , there will be following error in the .out file:

Error: Implementation 'ILLINOISGRMHD' not activated.
       This implementation is required by activated thorn(s):
           VolumeIntegrals_GRMHD (implementing VolumeIntegrals_GRMHD)
       This implementation is provided by compiled thorn(s):
           IllinoisGRMHD
       Add a thorn providing this implementation to the ActiveThorns parameter.
Activation failed - 1 errors in activation sequence

It seems it is required to activate IllinoisGRMHD  in order to use VolumeIntegrals_GRMHD.

Thanks,
Chia-Hui
________________________________
寄件者: Zach Etienne <zachetie at gmail.com<mailto:zachetie at gmail.com>>
寄件日期: 2018年7月13日 下午 09:04:30
收件者: 林家暉
副本: Einstein Toolkit Users
主旨: Re: [Users] error after activating IllinoisGRMHD and VolumeIntegrals_GRMHD

Hi Chia-Hui,

Is there a reason you are using IllinoisGRMHD for this particular example? The example was written for GRHydro.

-Zach

*     *     *
Zachariah Etienne
Assistant Professor of Mathematics
West Virginia University
http://math.wvu.edu/~zetienne/
http://blackholesathome.net

On Thu, Jul 12, 2018 at 11:35 PM, 林家暉 <r06222015 at ntu.edu.tw<mailto:r06222015 at ntu.edu.tw>> wrote:

Dear whom it may concern,

I tried to solve the tracking problem of unequal mass binary neutron (http://einsteintoolkit.org/gallery/bns/index.html ) star by using the thorn WVUThorns_Diagnostics / VolumeIntegrals_GRMHD . Therefore I activate both IllinoisGRMHD and VolumeIntegrals_GRMHD. However I met the error which showed in both .err file and .out file.

In .err file:
Thu Jul 12 08:03:04 2018: [unset]:_pmi_alps_init:alps_get_placement_info returned with error -1
Thu Jul 12 08:03:04 2018: [unset]:_pmi_init:_pmi_alps_init returned -1

In .out file:
INFO (IllinoisGRMHD): Font fix failed!
INFO (IllinoisGRMHD): i,j,k = 78 31 41, stats.failure_checker = 10000 x,y,z = -1.800000e+01 -7.593750e+00 1.068750e+01 , index=574610 st_i = -nan -nan -nan, rhostar = 2.902693e+243, Bi = 0.000000e+00 0.000000e+00 0.000000e+00, gij = 1.295702e+00 0.000000e+00 0.000000e+00 1.295702e+00 0.000000e+00 1.295702e+00, Psi6 = 1.474883e+00
INFO (IllinoisGRMHD): Couldn't find root from: -nan 2.902693e+243 -nan -nan -nan, rhob approx=1.968084e+243, rho_b_atm=1.000000e+200, Bx=0.000000e+00, By=0.000000e+00, Bz=0.000000e+00, gij_phys=1.295702e+00 0.000000e+00 0.000000e+00 1.295702e+00 0.000000e+00 1.295702e+00, alpha=8.746533e-01

I am not sure what these error exactly mean and how to solve it.

Thanks.
Chia-Hui

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