Uncertainty evaluation due to the difference in definitions of the acceleration parameter to examine the influence of mean flow acceleration on the experimental turbulent flows

Takanari Kashiwagi, Hiroki Suzuki, Shinsuke Mochizuki

Research output: Contribution to journalConference articlepeer-review

Abstract

This study presents the uncertainty arising from the difference among three definitions of acceleration parameter. Previous studies have used two definitions of the acceleration parameter, denoted as the first and second definitions in this study. In the present study, an intermediate definition is introduced in addition to the two definitions. Then, mean velocity profile functions represented by each of these definitions are derived. If the magnitude of the acceleration parameter is sufficiently small, the mean velocity profiles represented by the definitions can result in the same with each other and are derived to be a linear function. The difference magnitude in the mean velocity profile among these definitions is of the order of the square of the acceleration parameter magnitude. The difference in the values obtained experimentally for the acceleration parameter can be larger than the order of the typical magnitude in experimental uncertainty. The present study derives a simple formula to estimate a value of the second definition from that of the first definition. The deviation uncertainty of this derived formula is found to be smaller than the magnitude of this typical experimental uncertainty.

Original languageEnglish
Article number012012
JournalJournal of Physics: Conference Series
Volume2369
Issue number1
DOIs
Publication statusPublished - 2022
Event5th International Conference on Mechanical, Electric, and Industrial Engineering, MEIE 2022 - Virtual, Online
Duration: Jun 24 2022Jun 25 2022

ASJC Scopus subject areas

  • General Physics and Astronomy

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