Analysis on flow around a sphere at high Mach number, low reynolds number and adiabatic condition for high accuracy analysis of gas particle flows

T. Nagata, T. Nonomura, S. Takahashi, Y. Mizuno, K. Fukuda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This study analyses gas particle flow around a sphere under an adiabatic condition at high Mach number and low Reynolds number by direct numerical simulation of the three- dimensional compressible Navier-Stokes equation to investigate flow properties. The calculation was performed on a boundary-fitted coordinate system with a high-order scheme of sufficient accuracy. Analysis is conducted by assuming a rigid sphere with a Reynolds number based on the diameter of the sphere, and the free-stream velocity set between 50 and 300 and a free-stream Mach number set between 0.3 and 2.0. The effect of the Mach number on the flow properties and drag coefficient are discussed. The calculation shows the following results: 1) unsteady fluctuation of the hydrodynamic force becomes smaller as the Mach number increases, 2) the drag coefficient increases along with the Mach number due to an increase in the pressure drag by the shock-wave, and 3) an accurate prediction of the drag coefficient in the supersonic regime using traditional models might be difficult.

Original languageEnglish
Title of host publicationCOUPLED PROBLEMS 2015 - Proceedings of the 6th International Conference on Coupled Problems in Science and Engineering
EditorsEugenio Onate, Manolis Papadrakakis, Bernhard A. Schrefler
PublisherInternational Center for Numerical Methods in Engineering
Pages760-771
Number of pages12
ISBN (Electronic)9788494392832
Publication statusPublished - 2015 Apr 1
Externally publishedYes
Event6th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2015 - Venice, Italy
Duration: 2015 May 182015 May 20

Publication series

NameCOUPLED PROBLEMS 2015 - Proceedings of the 6th International Conference on Coupled Problems in Science and Engineering

Other

Other6th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2015
Country/TerritoryItaly
CityVenice
Period15/5/1815/5/20

Keywords

  • Drag model
  • High Mach number and Low Reynolds number flow

ASJC Scopus subject areas

  • Computational Mathematics
  • Engineering(all)
  • Applied Mathematics

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