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

A. Rubino, M. Pini, M. Kosec, S. Vitale, P. Colonna

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
24 Downloads (Pure)

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.

Original languageEnglish
Pages (from-to)70-77
Number of pages8
JournalJournal of Computational Science
Volume28
DOIs
Publication statusPublished - 1 Sep 2018

Keywords

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

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