Parametric uncertainty is propagated through Reynolds-averaged Navier-Stokes (RANS) computations of a prototypical acetone/air aerosol stream flowing in a dry air environment. Two parameters are considered as uncertain: the inflow velocity dissipation and a coefficient that blends the discrete random walk and the gradient-based dispersion models. A Bayesian setting is employed to represent the degree of belief about the parameters of interest in terms of probability theory, such that uncertainty is described with probability density functions. Random variables are represented by means of polynomial chaos expansions. The sensitivity of mean axial velocity and mean vapor mass fraction to the uncertain parameters is discussed.

Uncertainty quantification analysis of RANS of spray jets / Ciottoli, P. P.; Petrocchi, A.; Malpica Galassi, R.; Angelilli, L.; Hernandez Perez, F. E.; Picano, F.; Valorani, M.; Im, H. G.. - (2020), pp. 1-13. (Intervento presentato al convegno AIAA Propulsion and Energy 2020 Forum tenutosi a Virtual - Online) [10.2514/6.2020-3882].

Uncertainty quantification analysis of RANS of spray jets

Ciottoli P. P.;Petrocchi A.;Malpica Galassi R.;Angelilli L.;Valorani M.;
2020

Abstract

Parametric uncertainty is propagated through Reynolds-averaged Navier-Stokes (RANS) computations of a prototypical acetone/air aerosol stream flowing in a dry air environment. Two parameters are considered as uncertain: the inflow velocity dissipation and a coefficient that blends the discrete random walk and the gradient-based dispersion models. A Bayesian setting is employed to represent the degree of belief about the parameters of interest in terms of probability theory, such that uncertainty is described with probability density functions. Random variables are represented by means of polynomial chaos expansions. The sensitivity of mean axial velocity and mean vapor mass fraction to the uncertain parameters is discussed.
2020
AIAA Propulsion and Energy 2020 Forum
UQ; particle laden flow; polynomial chaos
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Uncertainty quantification analysis of RANS of spray jets / Ciottoli, P. P.; Petrocchi, A.; Malpica Galassi, R.; Angelilli, L.; Hernandez Perez, F. E.; Picano, F.; Valorani, M.; Im, H. G.. - (2020), pp. 1-13. (Intervento presentato al convegno AIAA Propulsion and Energy 2020 Forum tenutosi a Virtual - Online) [10.2514/6.2020-3882].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1447578
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