Print Email Facebook Twitter High Fidelity Simulations and Modelling of Dissipation in Boundary Layers of Non-ideal Fluid Flows Title High Fidelity Simulations and Modelling of Dissipation in Boundary Layers of Non-ideal Fluid Flows Author Tosto, F. (TU Delft Flight Performance and Propulsion) Wheeler, Andrew (University of Cambridge) Pini, M. (TU Delft Flight Performance and Propulsion) Contributor White, M. (editor) Date 2023 Abstract In this work, we investigate the sources of dissipation in adiabatic boundary layers of non-ideal compressible fluid flows. Direct numerical simulations of transitional, zero-pressure gradient boundary layers are performed with an in-house solver considering two fluids characterized by different complexity of the fluid molecules, namely air and siloxane MM. Different sets of thermodynamic free stream boundary conditions are selected to evaluate the influence of the fluid state on the frictional loss and dissipation mechanisms. The thermo-physical properties of siloxane MM are obtained with a state-of-the-art equation of state. Results show that the dissipation due to both time-mean strain field and irreversible heat transfer, and the turbulent dissipation are significantly affected by both the molecular complexity of the fluid and its thermodynamic state. The dissipation coefficient calculated from the DNS is then compared against the one obtained from a reduced-order boundary layer CFD model [1] which has been extended to treat fluids modeled with arbitrary equations of state [7]. Subject boundary layerDirect Numerical Simulationdissipation coefficientNon-Ideal Compressible Fluid Dynamicsorganic Rankine cycleturbulence To reference this document use: http://resolver.tudelft.nl/uuid:10bd48de-3eab-4d9a-b01f-b411421e9dff DOI https://doi.org/10.1007/978-3-031-30936-6_7 Publisher Springer Embargo date 2023-11-02 ISBN 978-3-031-30936-6 Source ERCOFTAC Series Series ERCOFTAC Series, 1382-4309, 29 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type book chapter Rights © 2023 F. Tosto, Andrew Wheeler, M. Pini Files PDF 978_3_031_30936_6_7.pdf 691 KB Close viewer /islandora/object/uuid:10bd48de-3eab-4d9a-b01f-b411421e9dff/datastream/OBJ/view