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Anastasiia Gorbunova - Eulerian spatiotemporal correlations in passive scalar turbulence

In this paper, Anastasiia Gorbunova and co-authors study spatio-temporal correlation function of a passive scalar in 3D homogeneous isotropic turbulence and synthetic velocity fields, by means of direct numerical simulations. Two regimes of temporal decorrelation are observed: a Gaussian at small time lags and exponential at large time lags. This behaviour is in agreement with recent analytical results.