Users July 2023

users@lists.einsteintoolkit.org

15 participants
28 discussions

Fwd: energy and pressure fluctuation at the boundary of the initial BNS configuration generated by Lorene
by Roland Haas 10 Jul '23

10 Jul '23

Hello all, This reached me due to problems registering in the user's list. Since I am not an expert on ID and Jimmy was ok with me forwarding, I will pass this along: Yours, Roland Begin forwarded message: Date: Tue, 4 Jul 2023 22:25:35 +0800 (CST) From: 白济民 <beki-cat(a)sjtu.edu.cn> To: rhaas(a)illinois.edu Subject: energy and pressure fluctuation at the boundary of the initial BNS configuration generated by Lorene Dear all, When using Lorene to generate initial BNS data, I noticed, after drawing the energy and pressure distribution, there are some ripples (discontinuities) at the boundary of each star. When generating the initial data of lower binary mass, I noticed the discontinuities have become more notable and is not fit for running the follow-up numerical simulation. I add the energy distribution of the initial data of the standard mass BNS and the low mass BNS, respectively, in the attachment. It clearly shows the ripples at the star boundary. The enthalpy distribution is smooth in both case. I wonder how to fix this. Thanks for your help! Thanks in advance, Jimmy -- My email is as private as my paper mail. I therefore support encrypting and signing email messages. Get my PGP key from http://pgp.mit.edu .

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running TOVSolver standalone
by CJ Osakwe 07 Jul '23

07 Jul '23

Hello, I am a Ph.D. student working at the University of Calgary. I recently started using the Einstein Toolkit to conduct numerical relativity simulations for my thesis. As of now I am familiarizing myself with the software. In particular, I am trying to model a perturbed TOV neutron star. To this end, I used the TOVSolver thorn for my initial data (based off of the single, stable neutron star example). Where does the TOVSolver thorn output its data? I have so far been unable to determine this myself. I want to run this thorn by itself and am not sure how. Any help would be greatly appreciated. Cheers, CJ Osakwe

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Only getting partial Waveform while running that parameter file in the gallery example for BBH GW150914
by Vinod Pisharody 07 Jul '23

07 Jul '23

Hello, I have been trying to run the simulation of GW150914 given in gallery .The simulation ran succesfully .However I am only getting a partial waveform .The merger and the ringdown phase is not being captured .I am attaching both the waveform and a gnuplot showing the completing of merger . There is also another doubt I have .In the gallery while creating the job for this simulation there is a command called --define N which is set to 28 .Could someone tell me whats the purpose of that and help me understand whats going wrong ? Thanks and Regards, Vinod

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Failure to run static_tov simulation using more than 1 node on cluster
by Wei Sun 07 Jul '23

07 Jul '23

Hello, I am trying to run the static_tov simulation on my university's cluster (CRC Notre Dame <https://docs.crc.nd.edu/new_user/quick_start.html>). However, I got this error when acquiring 48 cores: Error: Too many nodes specified: nodes=2 (maxnodes is 1) I am assuming this is due to the *#Source tree management* module in the Cactus/simfactory/mdb/machines/<host>.ini file. In my case, the automatic *.ini file I got has these configuration: ppn = 24 max-num-threads = 24 num-threads = 12 nodes = 1 However, the machine I use has 24 cores for each node, and the number of threads for each core is 1. That means if I run the simulation using 48 cores, I need 2 nodes. Although I didn't get 2 hosts successfully(I got only 1), I am wondering if I have to edit the <host>.ini file after the command ./simfactory/bin/sim setup-silent by hand, for example: num-threads=1, nodes=2? Or is there any other correct way for getting more than 1 node? I would be appreciate it if you could give me some ideas on this problem. Best regards, Wei

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PROBLEM RUNNING GW150914
by Jose Luis Rativa Medina 06 Jul '23

06 Jul '23

Hi, I'm trying to run the GW150914 <https://einsteintoolkit.org/gallery/bbh/index.html> simulation on my MSI GF63 9sc but the parameter file contains python code and I don't know how to run it. Thanks -- *José Luis Rativa Medina* *Estudiante ing. sistemas y computación* *Universidad Nacional de Colombia* -- *Aviso legal:* El contenido de este mensaje y los archivos adjuntos son confidenciales y de uso exclusivo de la Universidad Nacional de Colombia. Se encuentran dirigidos sólo para el uso del destinatario al cual van enviados. La reproducción, lectura y/o copia se encuentran prohibidas a cualquier persona diferente a este y puede ser ilegal. Si usted lo ha recibido por error, infórmenos y elimínelo de su correo. Los Datos Personales serán tratados conforme a la Ley 1581 de 2012 y a nuestra Política de Datos Personales que podrá consultar en la página web www.unal.edu.co <http://www.unal.edu.co/>.* *Las opiniones, informaciones, conclusiones y cualquier otro tipo de dato contenido en este correo electrónico, no relacionados con la actividad de la Universidad Nacional de Colombia, se entenderá como personales y de ninguna manera son avaladas por la Universidad.

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meeting minutes for 2023-07-06
by Steven R. Brandt 06 Jul '23

06 Jul '23

Present: Steven, Roland, Sam, Yosef No updates on SPEC benchmark ET release planning Sam's updates: - Illinois GRMHD updated to use the thorn that provides Grhayllib - Grhayllib proposed for includion - GrhaylHD is a pure hydro version that also depends on Grhayllib - GrhaylHDX is the CarpetX version and other Grhayl thorns. - 3 new thorns + 2 or 3 if CarpetX makes it. - Updates to 2 thorns - Also Sam has a list of deprecations CarpetX is attempting to be on track - no docs as yet - no clear idea which thorns come with it - Erik is renaming to avoid conflicts The RIT workshop: - Mostly set - One change in speaker but no change in topics - Visualization video instead of live - Request notebooks get sent to me ahead of time Working Workshop: - Roland will set things up Tickets: - rdwr.pl is too noisy Next week: Chair: Yosef Minutes: Roland

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Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 05 Jul '23

05 Jul '23

Hello, Please consider joining the weekly Einstein Toolkit phone call at 9:00 am US central time on Thursdays. For details on how to connect and what agenda items are to be discussed, use the link below. https://docs.einsteintoolkit.org/et-docs/Main_Page#Weekly_Users_Call --The Maintainers

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Agenda for Thursday's Meeting
by rhaas＠illinois.edu 03 Jul '23

03 Jul '23

Please update the Wiki with agenda items for Thursday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --The Maintainers

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Users July 2023