Mesoscale transport properties induced by near critical resistive pressure-gradient-driven turbulence in toroidal geometry

Numerical calculations of resistive pressure-gradient-driven turbulence in toroidal geometry in a range of beta values where the pressure profile is close to critical show self-similarity of space and time scales. These self-similarity properties lead to a fractional diffusive equation for mesoscale tracer-particle transport. The indices of the fractional derivates are consistent with the ones found for resistive pressure-gradient-driven turbulence in cylindrical geometry.