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Using Frontera, Most and Alexander Philippov (Flatiron Institute) have been investigating flares in relativistic magnetospheres of compact objects using global force-free simulations.

The interaction of the stars' strong magnetic fields prior to the collision could give rise to as-yet-unobserved radio and X-ray transients. The collision of two neutron stars might not only be accompanied by gravitational wave emissions and electromagnetic afterglows. 'But if we focus on them, and measure them, we can make codes better over time.'Д®lias Most, Associate Research Scholar, Princeton University, and Member, Institute for Advanced Study 'Algorithmic improvements like this multipatch scheme take years to develop and are a big lift and a big investment,' Stanzione said.

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Her team found that the long-term simulation, covering the full domain, was 30 times more efficient with PWMHD than with their previous methods. The framework - primarily developed by postdoctoral researchers, Mark Avara (Rochester Institute of Technology) and Hotaka Shiokawa (John Hopkins University) - permits efficient computation of heterogeneous systems involving multiple kinds of physics, multiple length-scales, and multiple reference frames.ДЄt the user meeting, Campanelli described the first successful Patchwork magneto-hydrodynamics (PWMHD) simulation of accreting binary supermassive black holes.

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Manuela Campanelli, Distinguished Professor, Rochester Institute of TechnologyД¬ampanelli, principal investigator of two Frontera allocations, is among a team of astrophysicists who developed a вЂPatchwork' framework, where the global simulation is comprised of an arbitrary number of moving local meshes, or patches, which are free to employ their own resolution, coordinate system, physics equations, reference frame, and even, numerical methods.

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Stanzione, in his talk, noted four ways researchers, through careful consideration of their computing problem, have been able to achieve massive improvements in code performance. To illustrate his point, he referenced NAMD (Nanoscale Molecular Dynamics), a popular biophysics code first introduced in 1995 that saw an 80% performance improvement when it was optimized for AVX 512, the latest x86 vector instruction set, in 2020.ДЄccretion dynamics around supermassive black hole mergers using the PatchworkMHD code.

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Speaking at the inaugural Frontera User Meeting in 2021, TACC executive director Dan Stanzione asked, 'Is it realistic to expect us to make significant improvements in software over the next few years, given that some of our leading codes are decades old?' TACC plans to achieve these improvements, in part, through software, algorithmic, and environmental optimizations. A key component of the facility will be a new instrument for science that can achieve an order of magnitude, or 10x, improvement in scientific efficiency over Frontera, the top academic supercomputer in the world today, when it comes online. Since 2019, the Texas Advanced Computing Center has been working with the National Science Foundation on an effort to create a Leadership-Class Computing Facility (LCCF) at The University of Texas at Austin.

Peak performance on supercomputers may be rising unchecked, but getting real improvements in scientific productivity is an altogether different challenge. Magnetospheric interaction of two neutron stars in their final orbits

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