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Wet to dry self-transitions in dense emulsions: From order to disorder and back
Physical Review Fluids ( IF 2.7 ) Pub Date : 2021-02-22 , DOI: 10.1103/physrevfluids.6.023606
Andrea Montessori , Adriano Tiribocchi , Marco Lauricella , Fabio Bonaccorso , Sauro Succi

One of the most distinctive hallmarks of many-body systems far from equilibrium is the spontaneous emergence of order under conditions where disorder would be plausibly expected. Here, we report on the self-transition between ordered and disordered emulsions in divergent microfluidic channels, i.e., from monodisperse assemblies to heterogeneous polydisperse foamlike structures, and back again to ordered ones. The transition is driven by the nonlinear competition between viscous dissipation and surface tension forces as controlled by the device geometry, particularly the aperture angle of the divergent microfluidic channel. An unexpected route back to order is observed in the regime of large opening angles, where a trend towards increasing disorder would be intuitively expected.

中文翻译:

从致密乳液中的干变到干变:从无序到无序

在远离平衡的多体系统中,最明显的标志之一是在可能会出现混乱的条件下自发出现秩序。在这里,我们报道了有序和无序乳液在不同的微流体通道中的自我转变,即从单分散组装到异质多分散泡沫状结构,再回到有序乳液。该过渡是由粘性耗散和表面张力之间的非线性竞争驱动的,该非线性竞争由装置的几何形状控制,尤其是发散的微流体通道的孔径角。在大开启角度的情况下,观察到了一种恢复秩序的出乎意料的途径,可以直观地预期到紊乱加剧的趋势。
更新日期:2021-02-22
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