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SUMMARY:Miquel Miravet Tenés: The magnetorotational instability and small
 -scale dynamics in neutron stars
DTSTART:20260528T111500Z
DTEND:20260528T120000Z
DTSTAMP:20260506T184600Z
UID:indico-event-9567@indico.fysik.su.se
DESCRIPTION:Insufficient numerical resolution in current grid-based simula
 tions limits the development of turbulence at small scales in neutron star
 s and their mergers. These unresolved processes can influence the large-sc
 ale dynamics and gravitational-wave emission\, and neglecting them may com
 promise the reliability of simulations for comparison with observations. A
 chieving the resolution required to capture such effects fully\, however\,
  is computationally prohibitive.\nSubgrid models provide an alternative by
  representing the impact of unresolved turbulence on the resolved flow\, t
 hereby enabling key physical effects to be captured at reduced computation
 al cost. In this talk\, I will introduce the framework of large-eddy simul
 ations and review selected state-of-the-art applications in neutron star m
 odelling. I will then present the MHD-instability-induced-turbulence (MInI
 T) subgrid model\, with a focus on its application to turbulence driven by
  the magnetorotational instability (MRI). In particular\, I will discuss i
 ts role in the post-merger evolution of neutron stars and in differentiall
 y rotating configurations susceptible to the MRI\, and present recent resu
 lts obtained with this approach.\n\nhttps://indico.fysik.su.se/event/9567/
LOCATION:A5:1003 (AlbaNova Main Building)
URL:https://indico.fysik.su.se/event/9567/
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