期刊
JOURNAL OF CHEMICAL PHYSICS
卷 156, 期 15, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0085773
关键词
-
资金
- Swiss National Science Foundation [200021_172514]
- Swiss National Science Foundation (SNF) [200021_172514] Funding Source: Swiss National Science Foundation (SNF)
This study demonstrates that the slow viscoelastic response of a foam can be described by a power-law fluid with a terminal relaxation. The reversible power-law contribution accounts for the observed non-Maxwellian features in various tests, indicating a delayed elastic response. The power-law spectrum originates from a combination of superdiffusive bubble dynamics and stress diffusion.
We show that the slow viscoelastic response of a foam is that of a power-law fluid with a terminal relaxation. Investigations of the foam mechanics in creep and recovery tests reveal that the power-law contribution is fully reversible, indicative of a delayed elastic response. We demonstrate how this contribution fully accounts for the non-Maxwellian features observed in all tests, probing the linear mechanical response function. The associated power-law spectrum is consistent with soft glassy rheology of systems with mechanical noise temperatures just above the glass transition [Fielding et al., J. Rheol. 44, 323 (2000)] and originates from a combination of superdiffusive bubble dynamics and stress diffusion, as recently evidenced in simulations of coarsening foam [Hwang et al., Nat. Mater. 15, 1031 (2016)].& nbsp; (C) 2022 Author(s).& nbsp;
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据