Is Vorticity Amplification Essential for Anomalous Dissipation and Intermittency in Turbulence?
The distinct dynamical roles of vorticity amplification (VA) and vortex tilting (VT) in three-dimensional homogeneous isotropic turbulence are investigated using direct numerical simulations of a modified Navier--Stokes system. By selectively suppressing VA while retaining VT, we demonstrate that gradient amplification...