Hele-Shawセル内における非ニュートン流体のフラクタル現象 [in Japanese] The Fractal Phenomenon of the Non-Newtonian Fluid in a Hele-Shaw Cell [in Japanese]
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We injected air into some viscous fluids in a square Hele-Shaw cell and studied a phenomenon called 'viscous fingerings': the behavior of interface between air and the viscous fluid. We used glycerin, aqueous solution of syrup, and aqueous solution of polyacrylamide (PAA)as the viscous fluids. Glycerin and the syrup solution were the Newtonian fluids and the PAA solution was the non-Newtonian fluid. When the pressure of injection was low, there was no signficant difference in the growth of viscous fingers between the Newtonian and non-Newtonian fluids. On the other hand when the pressure was high, viscous fingers grew to form high density structures for the Newtonian fluid, but they grew to form branched structurues for the PAA solution. The branched structures in the latter case were attributed to strong effects of 'shielding'. These structures had a nature of fractal growth.
- Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan)
Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan) 24(3), 105-109, 1996-09-15
The Society of Rheology, Japan