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<p>A new wide-ranging correlation for the thermal conductivity of neon, based on the most recent ab initio dilute gas theoretical calculations, a simplified crossover critical enhancement contribution, and critically evaluated experimental data, is presented. The correlation is designed to be used with a high-accuracy Helmholtz equation of state (EOS) over the range of temperatures from 24.5561&#xa0;K (the triple-point temperature) to 700&#xa0;K and at pressures up to 700&#xa0;MPa. The model includes a zero-density correlation based on recent ab initio values, valid from 5&#xa0;K to 5000&#xa0;K with an expanded uncertainty (<i>k</i> = 2) ranging from 0.15&#xa0;% at the triple-point temperature to 0.028&#xa0;% at 5000&#xa0;K. In the range 200&#xa0;K to 700&#xa0;K for pressures up to 0.1&#xa0;MPa, the estimated uncertainty of the full correlation (as indicated by comparisons with the most accurate measurements) is 0.3&#xa0;% and rises to 0.7&#xa0;% for temperatures from 85&#xa0;K to 200&#xa0;K. For pressures between 0.1&#xa0;MPa to 40&#xa0;MPa for temperatures between 100 K and 463&#xa0;K, the uncertainty is 1.5&#xa0;%. In the liquid phase the estimated expanded uncertainty rises to 15&#xa0;% due to the lack of high-quality experimental data. The correlation behaves in a physically reasonable manner when extrapolated to temperatures and pressures above the limits of the EOS, however below approximately 100&#xa0;K the correlation should be considered preliminary pending additional experimental low-temperature data.</p>

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Reference Correlation of the Thermal Conductivity of Neon

  • 期刊论文

  • 发表日期：

    2026年6月30日

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  • Marc J. Assael,
  • Sofia G. Sotiriadou,
  • Monika Thol,
  • Marcia L. Huber

摘要

A new wide-ranging correlation for the thermal conductivity of neon, based on the most recent ab initio dilute gas theoretical calculations, a simplified crossover critical enhancement contribution, and critically evaluated experimental data, is presented. The correlation is designed to be used with a high-accuracy Helmholtz equation of state (EOS) over the range of temperatures from 24.5561 K (the triple-point temperature) to 700 K and at pressures up to 700 MPa. The model includes a zero-density correlation based on recent ab initio values, valid from 5 K to 5000 K with an expanded uncertainty (k = 2) ranging from 0.15 % at the triple-point temperature to 0.028 % at 5000 K. In the range 200 K to 700 K for pressures up to 0.1 MPa, the estimated uncertainty of the full correlation (as indicated by comparisons with the most accurate measurements) is 0.3 % and rises to 0.7 % for temperatures from 85 K to 200 K. For pressures between 0.1 MPa to 40 MPa for temperatures between 100 K and 463 K, the uncertainty is 1.5 %. In the liquid phase the estimated expanded uncertainty rises to 15 % due to the lack of high-quality experimental data. The correlation behaves in a physically reasonable manner when extrapolated to temperatures and pressures above the limits of the EOS, however below approximately 100 K the correlation should be considered preliminary pending additional experimental low-temperature data.