Equations and improved coefficients for paralleltransport in multicomponent collisional plasmas: method and application for tokamak modelling

TL;DR

This paper derives improved analytical expressions for parallel transport coefficients in multicomponent collisional plasmas, enhancing accuracy for tokamak modeling by integrating viscosity effects and correcting previous typos.

Contribution

It introduces refined formulas for plasma transport coefficients based on Grad's method, applicable to Braginskii equations, and demonstrates their implementation in the SOLPS-ITER code for tokamak simulations.

Findings

Enhanced transport coefficient expressions with improved accuracy.

Successful implementation and testing in ITER plasma simulations.

Corrections of previous typographical errors in foundational literature.

Abstract

New analytical expressions for parallel transport coefficients in multicomponent collisional plasmas are presented in this paper. They are improved versions of the expressions written in [V. M. Zhdanov. Transport Processes in Multicomponent Plasma, vol. 44. 10 2002.], based on Grad's 21N-moment method. Both explicit and approximate approaches for transport coefficients calculation are considered. Accurate application of this closure for the Braginskii transport equations is discussed. Viscosity dependence on the heat flux is taken into account. Improved expressions are implemented into the SOLPS-ITER code and tested for deuterium and neon ITER cases. Some typos found in [V. M. Zhdanov. Transport Processes in Multicomponent Plasma, vol. 44. 10 2002.] are corrected.