垂直衝撃波を通過する微粒子挙動の数値的研究 : 第1報,定常衝撃波を通過する場合(流体工学,流体機械)

概要

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Measuring techniques such as Laser Doppler Anemometry (LDA), Particle Image Velocimetry (PIV), Particle Tracking Velocimetry (PTV) and Holographic Particle Image Velocimetry (HPIV) depend on the velocity information obtained from a micron-sized particle traveling in a fluid. The traceability of these particles to any velocity changes in a flow field is one of the key assumptions, in applying such techniques. However, in the flow field with large velocity gradient, this assumption would become improper. This paper shows a numerical investigation for the motion of tracer particles in the presence of steep velocity gradient across a steady shock wave. Various particles with different radius and density are taken into account. The particle motions are simulated by using Basset-Boussinesq-Oseen (BBO) equation. The contribution of each term in the equation to particle behaviour is investigated. The results indicate that the non-dimensional settling length can be estimated only from the particle diameter.
社団法人日本機械学会の論文
2003-06-25