# Analytical expressions for thermophysical properties of solid and liquid tungsten relevant for fusion applications

## TL;DR

This paper reviews and consolidates experimental data on tungsten's thermophysical properties relevant for fusion, providing accurate analytical expressions with minimal extrapolation for modeling plasma-surface interactions.

## Contribution

It offers new, high-accuracy analytical expressions for tungsten's thermophysical properties, reducing reliance on extrapolated data for fusion modeling.

## Key findings

- Validated experimental data for tungsten's properties from room temperature to boiling point.
- Recommended analytical expressions with minimal extrapolation for key properties.
- Surface tension and viscosity require extrapolation, but other properties are well-characterized.

## Abstract

The status of the literature is reviewed for several thermophysical properties of pure solid and liquid tungsten which constitute input for the modelling of intense plasma-surface interaction phenomena that are important for fusion applications. Reliable experimental data are analyzed for the latent heat of fusion, the electrical resistivity, the specific isobaric heat capacity, the thermal conductivity and the mass density from the room temperature up to the boiling point of tungsten as well as for the surface tension and the dynamic viscosity across the liquid state. Analytical expressions of high accuracy are recommended for these thermophysical properties that involved a minimum degree of extrapolations. In particular, extrapolations were only required for the surface tension and viscosity.