Abstract
In the close proximity of the liquid-vapour saturation curve and critical point, well-known thermodynamic phenomena including large compressibility and critical point effects results in very unusual fluid dynamics features, including non-ideal or rarefaction shock waves, mixed and split waves. This unconventional behaviour, which cannot occur in the ideal flow of dilute gases, is referred to as Non-Ideal Compressible-Fluid Dynamics or NICFD. The focus of this contribution is to review the theoretical background of NICFD and to discuss the impact of highly non-ideal conditions on the design and properties of numerical schemes for compressible flows. Exemplary flow fields will be presented and compared to available experimental data from the Test-Rig for Organic VApours (TROVA) of Politecnico di Milano, a unique facility in which supersonic flows in non-ideal conditions can be measured and observed. The quantification of the uncertainty of operating conditions and of fluid properties is discussed.
Brief Biography
Prof. Alberto Guardone's research interests include the theoretical, numerical and experimental investigation of non-ideal compressible-fluid dynamics (NICFD), in-flight icing and rotorcraft aerodynamics and Aeroacoustics. He is the coordinator of the Laboratory of Compressible-fluid dynamics for Renewable Energy Applications (CREA, crealab.polimi.it) at Politecnico di Milano. He is the recipient of a ERC Consolidator Grant in 2013 and Proof-of-Concept Grant in 2019, and of diverse H2020 and national grants. He is currently coordinating the ERCOFTAC Special Interest Group on NICFD (SiG49, https://www.ercoftac.org/special_interest_groups/49_non-ideal_compressible_fluid_dynamics_nicfd_/) and he is the founding chair of the International seminar on NICFD (https://www.city.ac.uk/news-and-events/events/2022/november/4th-international-seminar-on-non-ideal-compressible-fluid-dynamics-nicfd-2022)
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