The challenges of relativistic turbulence modelling

by Dr Thomas Celora (CSIC)

Friday 5 Dec 2025, 14:00 → 16:00 Europe/Berlin

Abbeanum/1-HS2 - Straubel-HS (TPI, FSU Jena)

The development of turbulence in binary neutron star mergers is well established and known to influence a wide range of multi-messenger observables—from the gravitational-wave signal to the composition of ejecta and formation of relativistic jets. Because of its central importance, the past decade has seen a growing consensus on the need for adopting subgrid-scale modelling strategies to mitigate the prohibitive computational cost of fully resolving turbulence while simultaneously exploring the parameter space. 

In this talk, I will review the current state-of-the-art in turbulence modelling for binary neutron star mergers, and highlight the remarkable progress achieved in recent years. I will then address the issue of covariance breaking in relativistic turbulence modelling, and present a covariant framework for relativistic large-eddy simulations. Finally, I will conclude by outlining how this framework can serve as a diagnostic tool for quantifying turbulence-induced uncertainties in numerical relativity simulations.