1413 微細気泡混入系における粘弾性流体の旋回流動特性(S30-3 複雑流体の流動現象(3),S30 複雑流体の流動現象)

概要

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This report describes a swirling flow in rotating pipe section with viscoelastic fluid containing micro-bubbles. Particular attention was given to verify the flow behavior and its associated bubble motion in a viscoelastic fluid, when the dispersed micro-bubble flow is entered from a stationary pipe to the rotating pipe section. The result showed that elongated circulation vortex zones were generated, similar to Newtonian case. From experimental results, with an aid of the numerical simulation, the stagnation point moves towards the inlet region as swirl ratio Ω, is increase. It was also found that the stagnation point further moves toward the inlet in the case of viscoelastic field, showing that the dependence on Re^* becomes infinitesimal. The stagnation point is formed at the upstream in the expansion pipe in comparison with straight pipe.
社団法人日本機械学会の論文
2007-09-07