A look-up table method based on unstructured grids and its application to non-ideal compressible fluid dynamic simulations

A look-up table method based on unstructured grids and its application to non-ideal compressible fluid dynamic simulations

Rubino, A. (TU Delft Aerodynamics)
Pini, M. (TU Delft Flight Performance and Propulsion)
Kosec, M. (Stanford University)
Vitale, S. (TU Delft Flight Performance and Propulsion)
Colonna, Piero (TU Delft Flight Performance and Propulsion)

2018-09-01

Fast and accurate computation of thermo-physical properties is essential in computationally expensive simulations involving fluid flows that significantly depart from the ideal gas or ideal liquid behavior. A look-up table algorithm based on unstructured grids is proposed and applied to non-ideal compressible fluid dynamics simulations. The algorithm grants the possibility of a fully automated generation of the tabulated thermodynamic region for any boundary and to use mesh refinement. Results show that the proposed algorithm leads to a computational cost reduction up to one order of magnitude, while retaining the same accuracy level compared to simulations based on more complex equation of state. Furthermore, a comparison of the LuT algorithm with a uniformly spaced quadrilateral tabulation method resulted in similar performance and accuracy.

CFD
Interpolation
Look-up table
NICFD
Non-ideal compressible flow
Real-gas flows
Thermodynamic modeling
Trapezoidal map
Unstructured mesh

http://resolver.tudelft.nl/uuid:227cb98e-23d6-42e3-80da-a7a286591db3

https://doi.org/10.1016/j.jocs.2018.08.001

1877-7503

Journal of Computational Science, 28, 70-77

Institutional Repository

journal article

© 2018 A. Rubino, M. Pini, M. Kosec, S. Vitale, Piero Colonna