Well-posedness and ill-posedness of single-phase models for suspensions

Well-posedness and ill-posedness of single-phase models for suspensions
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悬架单相模型的适定性和不适定性

DOI:
10.1017/jfm.2022.1004
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发表时间:
2023
影响因子:
3.7
通讯作者:
Barker T
Barker T
中科院分区:
工程技术2区
文献类型:
--
作者:
Barker T

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悬浮液的经典理论已经从描述纯液体流动的Navier-Stokes方程开始,然后引入额外的依赖性来解释悬浮颗粒的存在。这些模型往往是准确的低颗粒浓度,但缺乏令人信服的描述颗粒的摩擦相互作用,这是重要的固体体积分数较大。流变学反而遭受灾难性的爆破。进一步的适定性扩展提供了一个框架,用于处理粘性流和惯性流之间的过渡。
Classical theories for suspensions have been formulated by starting from the Navier–Stokes equations describing pure liquid flow and then introducing additional dependencies to account for the presence of suspended particles. These models are often accurate for low particle concentrations but have lacked a convincing description of the frictional interactions of particles, which are important at larger solid volume fractions. The rheology instead suffers from catastrophic blow-up. A further well-posed extension provides a framework for handling the transition between viscous and inertial flows.
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