skip to main content

Title: Extended fluid models: Pressure tensor effects and equilibria

We consider the use of “extended fluid models” as a viable alternative to computationally demanding kinetic simulations in order to manage the global large scale evolution of a collisionless plasma while accounting for the main effects that come into play when spatial micro-scales of the order of the ion inertial scale d{sub i} and of the thermal ion Larmor radius ρ{sub i} are formed. We present an extended two-fluid model that retains finite Larmor radius (FLR) corrections to the ion pressure tensor while electron inertia terms and heat fluxes are neglected. Within this model we calculate analytic FLR plasma equilibria in the presence of a shear flow and elucidate the role of the magnetic field asymmetry. Using a Hybrid Vlasov code, we show that these analytic equilibria offer a significant improvement with respect to conventional magnetohydrodynamic shear-flow equilibria when initializing kinetic simulations.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ; ;  [1] ;  [4] ;  [5]
  1. Physics Department “E. Fermi,” University of Pisa and CNISM, Largo B. Pontecorvo 3, 56127 Pisa (Italy)
  2. (Germany)
  3. (France)
  4. Institut Jean Lamour, UMR 7198 CNRS – Université de Lorraine, BP 239 F-54506 Vandoeuvre les Nancy (France)
  5. International Institute for Fusion Science/PIIM, UMR 7345 CNRS Aix-Marseille University, Marseille (France)
Publication Date:
OSTI Identifier:
22218412
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 11; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ASYMMETRY; BOLTZMANN-VLASOV EQUATION; COLLISIONLESS PLASMA; CORRECTIONS; ELECTRONS; EQUILIBRIUM; HEAT FLUX; LARMOR RADIUS; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; MOMENT OF INERTIA; PLASMA FLUID EQUATIONS; PLASMA PRESSURE; PLASMA SIMULATION; SHEAR; TENSORS