纳米喉道连通宏观孔隙多孔介质中的空穴干燥和孔隙弹性松弛
Drying by Cavitation and Poroelastic Relaxations in Porous Media with Macroscopic Pores Connected by Nanoscale Throats
摘要：
我们研究了两个孔径相隔几个数量级的多孔介质的干燥动力学。我们的样品边缘的纳米级孔隙可防止空气进入，而干燥过程则通过样品内微米级空隙中液体中蒸汽气泡的异质成核（空化）进行。我们表明，空化和干燥的动力学设置由多孔介质中的确定性多孔弹性体质量输运和随机成核过程的相互作用。时空模式出现在这个不寻常的反应扩散系统，与时间振荡的干燥速率和可变粗糙度的干燥前。
英文摘要：
We investigate the drying dynamics of porous media with two pore diameters separated by several orders of magnitude. Nanometer-sized pores at the edge of our samples prevent air entry, while drying proceeds by heterogeneous nucleation of vapor bubbles (cavitation) in the liquid in micrometer-sized voids within the sample. We show that the dynamics of cavitation and drying are set by the interplay of the deterministic poroelastic mass transport in the porous medium and the stochastic nucleation process. Spatio-temporal patterns emerge in this unusual reaction-diffusion system, with temporal oscillations in the drying rate and variable roughness of the drying front.
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