UQ eSpace

Abstract

Implementation of approximate solution methods for the computation of transport properties in Gas Giant compositions was performed for the Eilmer methods library. Yos-Gupta binary mixing rules for viscosity and thermal conductivity as well as modified-Eucken frozen mixture thermal conductivity were validated against multi-component transport solutions from literature. Further, the models were applied to moderately and heavily ionised Saturn entry states. Yos-Gupta provided satisfactory predictions of mixture viscosity up to 10,000K at 1 atm pressure. Modified Eucken showed agreement within 5% up to 10,000K and within 12% up to 15,000K, this outperformed the Yos-Gupta approximation for the same gas state. When applied to Saturn entry conditions it was concluded that the models were able to evaluate effects associated with reaction of gases in the stagnation region and gave sufficient approximation of the moderately ionised entry state. The methods tested could not be recommended for highly ionised gas states as solutions were found to diverge. Lastly, a correction factor of π/10 was determined for implementation of DPLR collision integral fitting equations, and was validated against another collision integral library.