The effect of an unsteady drag force on the structure of a non-equilibrium region behind a shock wave in a gas-particle mixture

T. Saito, M. Saba, M. Sun, K. Takayama

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

For numerical analysis of shock wave propagation in gas-particle mixtures, drag coefficients of a sphere in steady flows are generally used. However, it is shown both experimentally and numerically that a shock loaded solid sphere experiences unsteady drag forces. The paper describes a model of unsteady drag force and its effect on the structure of the non-equilibrium region behind a shock front traveling in a dusty gas. The results are compared with those obtained by using a steady drag coefficient and are discussed. It is demonstrated that the large drag force at the early stage of the interaction between shock-wave induced flow and a solid particle affects the flow structure that is obtained with a steady drag force.

Original languageEnglish
Pages (from-to)255-262
Number of pages8
JournalShock Waves
Volume17
Issue number4
DOIs
Publication statusPublished - 2007 Dec 1

Keywords

  • Dusty gas shock tube flow
  • Non-equilibrium region
  • Numerical simulation
  • Unsteady drag force

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)

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