  We propose a new blow-up criterion for the 3D Euler equations of
incompressible fluid flows, based on the 3D Euler-Voigt inviscid
regularization. This criterion is similar in character to a criterion proposed
in a previous work by the authors, but it is stronger, and better adapted for
computational tests. The 3D Euler-Voigt equations enjoy global well-posedness,
and moreover are more tractable to simulate than the 3D Euler equations. A
major advantage of these new criteria is that one only needs to simulate the 3D
Euler-Voigt, and not the 3D Euler equations, to test the blow-up criteria, for
the 3D Euler equations, computationally.
