On the zero viscosity limit

Details On the zero viscosity limit On the zero viscosity limit

2007-01-25

arxiv.org/abs/hep-th/0701237v3

Physics

High Energy Physics

High Energy Physics - Theory

10 pages. Some formulas have been simplified and clarifying remarks have been added

Scientific paper

The question of whether the zero viscosity limit $\nu\to 0$ is identical to the no viscosity $\nu\equiv 0$ case is investigated in a simple shell (GOY) model with only three shells. We find that it is possible to express two velocities in terms of Bessel functions. The third velocity function acts as a background. The relevant Bessel functions are infinitely oscillating as $\nu\to 0$ and do not have a limiting value. Therefore two of the velocity functions of this three-shell model are not analytic functions of $\nu$ at the point $\nu =0$. We also mention a perturbative method which may be used to improve the model.

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