A look-up table method based on unstructured grids and its application to non-ideal compressible fluid dynamic simulations
A. Rubino (TU Delft - Aerodynamics)
Matteo Pini (TU Delft - Flight Performance and Propulsion)
M. Kosec (Stanford University)
S. Vitale (TU Delft - Flight Performance and Propulsion)
P Colonna di Paliano (TU Delft - Flight Performance and Propulsion)
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Abstract
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.
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