Abstract
High energy air Transport Coefficients modelling is made either with semiempirical laws or following molecular theory of gases and liquids developments. Semiempirical models come from Sutherland’s law for air viscosity. Instead, it is possible to develop different theoretical models using different approximation levels of the theory and different hypothesis on intermolecular potentials variations.
The calculation of these coefficients came from a particular weighed average of the contributions of the coefficients calculated for the single species present in the mixture with different concentrations. These sum rules are semiempirical simplification of the theoretical formulas, whose is impossible implementation in CFD hypersonic codes for the very expensive requested CPU times.
This work investigates the correctness to use some simplified expressions of the air transport coefficients at high energy, making comparison between results obtained using correct and approximate formulas.
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© 1996 Kluwer Academic Publishers
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De Filippis, F. (1996). Analysis of Approximation Introduced Using Simplified Sum Rules in Calculation of High Energy Air Transport Coefficients. In: Capitelli, M. (eds) Molecular Physics and Hypersonic Flows. NATO ASI Series, vol 482. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0267-1_25
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DOI: https://doi.org/10.1007/978-94-009-0267-1_25
Publisher Name: Springer, Dordrecht
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