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DTSTART;TZID=Europe/Stockholm:20240604T100000
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UID:submissions.pasc-conference.org_PASC24_sess158_pos102@linklings.com
SUMMARY:P48 - Simulations of Giant Impacts: The Importance of High Resolut
 ion
DESCRIPTION:Poster\n\nThomas Meier (University of Zurich); Christian Reinh
 ardt (University of Zurich, University of Bern); and Douglas Potter and Jo
 achim Stadel (University of Zurich)\n\nGiant impacts (GI) form the last st
 age of planet formation and play a key role in determining many aspects li
 ke the final structure of planetary systems and the masses and composition
 s of its constituents. A common choice for numerically solving the equatio
 ns of motion is the Smoothed Particle Hydrodynamics (SPH) method. We prese
 nt a new SPH code built on top of the modern gravity code pkdgrav3. The co
 de uses the Fast Multipole Method (FMM) on a distributed binary tree to ac
 hieve O(N) scaling and is designed to use modern hardware (SIMD vectorizat
 ion and GPU). Neighbor finding in SPH is done for a whole group of particl
 es at once and is tightly coupled to the FMM tree code. It therefore prese
 rves the O(N) scaling from the gravity code. A generalized Equation of Sta
 te (EOS) interface allows the use of various material prescriptions. Curre
 ntly available are the ideal gas and EOS for the typical constituents of p
 lanets: rock, iron, water, and hydrogen/helium mixtures. With the examples
  of an equal mass merger between two Earth-like bodies and a mantle stripp
 ing GI on Mercury (resolved with up to 2 billion particles) we demonstrate
  the advantages of high-resolution SPH simulations for planet scale impact
 s.\n\nSession Chair: Iva Kavcic (Met Office)
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