Numerical study of viscous effects on centreline shock reflection in axisymmetric flow

G. Shoev, H. Ogawa

研究成果: ジャーナルへの寄稿学術誌査読

8 被引用数 (Scopus)

抄録

Viscous effects on centreline shock reflection in an axisymmetric flow are studied numerically using Navier-Stokes and direct simulation Monte Carlo solvers. Computations at low Reynolds numbers have resulted in a configuration consisting of two shock waves, in contrast to the inviscid theory. On the other hand, computations at high Reynolds numbers have yielded a three-shock configuration in qualitative agreement with the inviscid theory prediction. This behaviour is explained by the presence of the so-called non-Rankine-Hugoniot zone, which accounts for the deviation of the shock structure from the inviscid paradigm. At Reynolds numbers on the verge of the transition from a two-shock to three-shock configuration, extremely high pressure that would be unattainable with the classical Rankine-Hugoniot relation for any shock configuration may occur. An analogy to the Guderley singularity in cylindrical shock implosion has been deduced for the shock behaviour from a mathematical viewpoint.

本文言語英語
論文番号026105
ジャーナルPhysics of Fluids
31
2
DOI
出版ステータス出版済み - 2月 1 2019
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 計算力学
  • 凝縮系物理学
  • 材料力学
  • 機械工学
  • 流体および伝熱

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