权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Dense Suspensions in Viscoelastic Media

粘弹性介质中的致密悬浮液

基本信息

批准号：
2577580
负责人：
金额：
--
依托单位：
University College London
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2577580
关键词：
Dense Suspensions Viscoelastic Media

项目摘要

Plan to research the rheology of dense suspensions in viscoelastic media; utilising computational methods to develop theoretical understanding. As of 2020, computational research into suspensions has focused mostly on Newtonian suspending media, with a limited number of works addressing the non-Newtonian (viscoelastic) case. There is a wealth of experimental research on the proposed topic; unfortunately, the lack of theoretical work has resulted in limited consolidation of experimental findings. Though the Newtonian case is simpler and better understood, the viscoelastic case is more representative of industrial, engineering and medical uses for suspensions. For example,paste extrusion processes such as those used to create shock absorbing composites or dense pastes used in foodstuffs and healthcare (e.g. toothpastes). Improvement to the quantitative understanding of VE suspension rheology could be used to highlight stagnation regions in reactors and mixers used to produce said suspensions, allowing engineers to investigate solutions. The overarching goal of my research will be to construct constitutive equations to describe the simulated behaviour in the dense regime, where the solid volume fraction of suspended particles is greater than 30%. These constitutive equations can then be used by engineering practitioners to provide quantitative predictions of real flows; thus assisting the advancement of process design.Research Areas: "continuum mechanics" and "fluid dynamics and aerodynamics".

计划研究粘弹性介质中稠密悬浮液的流变学;利用计算方法发展理论理解。截至2020年，悬浮液的计算研究主要集中在牛顿悬浮介质上，只有有限数量的工作涉及非牛顿（粘弹性）情况。有丰富的实验研究的建议的主题;不幸的是，缺乏理论工作导致有限的巩固实验结果。虽然牛顿的情况更简单，更容易理解，粘弹性的情况下，更有代表性的工业，工程和医疗用途的悬浮液。例如，糊剂挤出工艺，例如用于制造减震复合材料或用于食品和医疗保健的致密糊剂（例如牙膏）的那些。对VE悬浮液流变学的定量理解的改进可用于突出用于生产所述悬浮液的反应器和混合器中的停滞区域，从而使工程师能够研究解决方案。我的研究的首要目标将是构建本构方程来描述在稠密区的模拟行为，其中悬浮颗粒的固体体积分数大于30%。这些本构方程可以被工程实践者用来提供真实的流动的定量预测，从而帮助工艺设计的进步。研究领域：“连续介质力学”和“流体动力学和空气动力学”。