UAF Physics Department § Journal Club

Ingredients for non-diffusive transport have been identified in a simple two-dimensional electrostatic plasma fluid turbulence model with a flux-driven background profile. The numerical model is based on previous works on the dissipative trapped electron mode (DTEM). It advances two turbulence fields (density and potential), and a flux-driven background profile. Directional dependent critical gradients coupled with the flux-driven profile enable super-diffusive transport. Sub-diffusive transport in the cross-flow direction occurs with an externally driven shear flow or a self-consistently generated flow. The competition between super-diffusive transport and sub-diffusive transport occurs in parameter regimes where the shear rate is sufficiently large enough to interfere with the super-diffusive transport induced by the radial critical gradient.


	ABSTRACT Ingredients for non-diffusive transport have been identified in a simple two-dimensional electrostatic plasma fluid turbulence model with a flux-driven background profile. The numerical model is based on previous works on the dissipative trapped electron mode (DTEM). It advances two turbulence fields (density and potential), and a flux-driven background profile. Directional dependent critical gradients coupled with the flux-driven profile enable super-diffusive transport. Sub-diffusive transport in the cross-flow direction occurs with an externally driven shear flow or a self-consistently generated flow. The competition between super-diffusive transport and sub-diffusive transport occurs in parameter regimes where the shear rate is sufficiently large enough to interfere with the super-diffusive transport induced by the radial critical gradient.

	Friday, 16 October 2015
	Globe Room, Elvey Building
	3:45 PM