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DTSTAMP:20260202T201229Z
LOCATION:Second Floor Atrium
DTSTART;TZID=America/Chicago:20251118T080000
DTEND;TZID=America/Chicago:20251118T170000
UID:submissions.supercomputing.org_SC25_sess537_drs119@linklings.com
SUMMARY:Leveraging Performance Portability for High-Fidelity Simulations o
 f Black Hole Accretion
DESCRIPTION:Vedant Dhruv (University of Illinois Urbana-Champaign)\n\nAccu
 rately interpreting observations from the Event Horizon Telescope (EHT) re
 quires general relativistic magnetohydrodynamics (GRMHD) simulations that 
 can model increasingly complex physics. To address this need within an evo
 lving and heterogeneous computing landscape, we present some results from 
 KHARMA, a performance-portable GRMHD code built upon the Kokkos library.\n
 \nWe leverage KHARMA to implement two high-fidelity scientific models. Fir
 st, by incorporating an extended GRMHD (EGRMHD) model for weakly-collision
 al plasma, we produce synthetic observables that provide a better fit to E
 HT observations of the Galactic Center. Second, we simulate black hole acc
 retion in alternate theories of gravity, using the resulting electromagnet
 ic signatures to place new constraints on deviations from General Relativi
 ty. The computational demands of these advanced physical models are made t
 ractable by KHARMA's efficient, performance-portable, modular implementati
 on.\n\nOur work demonstrates how an extensible, performance-portable frame
 work enables the generation of high-fidelity models that directly address 
 key questions in black hole accretion physics. The resulting library of sy
 nthetic data not only constrains fundamental physics but also enables a mo
 re direct and robust comparison between complex theoretical models and obs
 ervational data.\n\nTag: Research & ACM SRC Posters\n\nRecording: Not Live
 streamed, Not Recorded\n\nRegistration Category: Technical Program Reg Pas
 s\n\nSession Chairs: Kento Sato (RIKEN Center for Computational Science (R
 -CCS)); Chris Schlipalius (Pawsey Supercomputing Research Centre; Commonwe
 alth Scientific and Industrial Research Organisation (CSIRO), Australia); 
 and Anja Gerbes (Georg-August-Universität Göttingen)\n\n
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