Accurate finite-volume high-order compact interpolation with non-orthogonal and non-uniform grids for computational aeroacoustics

Shogo Uehata, Nobuhiko Yamasaki

Research output: Contribution to journalConference articlepeer-review

Abstract

In recent years, with the development of supercomputers, the need for engineering applications of computational aeroacoustics is increasing. For industrial applications, the finite-volume compact interpolation is often applied as a discretization method. However, the original finite-volume compact interpolation can be applied only for calculation grids which are orthogonal and uniform, because the original finite-volume compact scheme is formulated assuming that calculation grids are orthogonal and uniform. Indeed, calculation grids for the computational aeroacoustics cannot be limited to orthogonal and uniform. Therefore, the finite-volume compact scheme for arbitrary calculation grids is required. In this paper, the finite-volume NOGS compact scheme is established in three dimensions to be suited for calculations using arbitrary grids. The interpolation error tests were conducted using a number of non-orthogonal and non-uniform grids to verify the NOGS compact scheme. From these interpolation tests, it is revealed that the NOGS compact scheme can reduce the interpolation error compared to the original compact scheme. Therefore, it is predicted that the reduction of the interpolation error leads to accurate evaluation of the numerical flux and that the calculation results are improved. Also, the large eddy simulations around a circular cylinder were conducted to verify the influence of the interpolation error reduction on the flow field and on the sound field.

Original languageEnglish
Article number012005
JournalJournal of Physics: Conference Series
Volume1509
Issue number1
DOIs
Publication statusPublished - May 6 2020
Event10th Asian-Pacific Conference on Aerospace Technology and Science, APCATS 2019 and the 4th Asian Joint Symposium on Aerospace Engineering, AJSAE 2019 - Hsin Chu, Taiwan, Province of China
Duration: Aug 28 2019Aug 31 2019

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Accurate finite-volume high-order compact interpolation with non-orthogonal and non-uniform grids for computational aeroacoustics'. Together they form a unique fingerprint.

Cite this