Workshop on dense granular flows

稠密颗粒流研讨会

• 批准号: EP/G031908/1
• 负责人: Ricky Wildman
• 金额: $ 1.94万
• 依托单位: Loughborough University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FG031908%2F1
• 关键词: Workshop; dense; granular; flows

In practical situations such as those met in industry where segregation and mixing are important, understanding particulate flows is complex due to the presence of polydispersity, anisotropy and complex grain morphology. In attempting to model such systems, many of these features are generally ignored, except perhaps through empirical parameter fitting. Developing a theory to include these effects is a considerable challenge, and made more difficult since the complexity of the behaviour often makes it difficult for practitioners and theorists to identify the key factors of influence. For example, though kinetic theories have been extended to binary systems, and in principle could be extended to systems with many sizes, the endeavour is impractical as it stands and how to model systems with continuous size distributions remains an open question. There are many interesting details in such flows, such as for example, non-equipartition, which confound the application of standard techniques from statistical physics and new mathematical formulations are required to capture the complex collisional details involved.It is clear that the combination of challenging environments in which particles are normally handled and the complex non-equilibrium physics that needs to be addressed, can only be tackled with an approach that involves an understanding of the practical difficulties and of fundamental principles, and a methodology that integrates experiment, theory, simulation and practice. This workshop is designed to facilitate such integration and provide a platform through which key groups of researchers and industrialists can collaborate to significantly advance our control of particulate systems.In order to meet the aims of the conference, we plan a scope of a workshop that allows a platform for a range of problems to be presented and discussed. The workshop will be configured to allow as many participants to contribute as possible, either through presentation or poster, and through the provision of extensive periods for discussion and networking. We will follow a workshop format with themed presentations and keynote in the morning, with the afternoon session set aside for led, round table discussions, network sessions and poster display. The talks will set the scene, present problems and possible solutions, whilst the discussion periods will facilitate interaction and working together.

在实际情况下，如在工业中遇到的那些分离和混合是重要的，理解颗粒流是复杂的，由于多分散性，各向异性和复杂的晶粒形态的存在。在试图对这样的系统建模时，这些特征中的许多通常被忽略，除非可能通过经验参数拟合。发展一种理论来包括这些影响是一个相当大的挑战，而且由于行为的复杂性往往使从业者和理论家难以确定影响的关键因素，因此变得更加困难。例如，虽然动力学理论已经扩展到二元系统，并且原则上可以扩展到具有许多尺寸的系统，但这种努力是不切实际的，并且如何模拟具有连续尺寸分布的系统仍然是一个悬而未决的问题。在这样的流动中有许多有趣的细节，例如，非均分，这混淆了统计物理学的标准技术的应用，并且需要新的数学公式来捕捉所涉及的复杂碰撞细节。很明显，通常处理粒子的具有挑战性的环境和需要解决的复杂非平衡物理学的组合，只有通过理解实际困难和基本原则，并采用实验、理论、模拟和实践相结合的方法，才能解决这些问题。本次研讨会旨在促进这种整合，并提供一个平台，通过该平台，研究人员和工业家的关键群体可以合作，以显着推进我们的颗粒系统控制。为了满足会议的目标，我们计划一个研讨会的范围，允许一个平台，一系列的问题被提出和讨论。讲习班的安排将允许尽可能多的与会者通过介绍或张贴海报以及通过提供广泛的讨论和建立联系的时间作出贡献。我们将遵循研讨会的形式，上午进行主题演讲和主题演讲，下午的会议用于领导，圆桌讨论，网络会议和海报展示。会谈将设置场景，提出问题和可能的解决方案，而讨论期间将促进互动和共同努力。

项目成果

Convection in three-dimensional vibrofluidized granular beds

• DOI: 10.1017/jfm.2011.209
• 发表时间: 2011-08
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: H. Viswanathan;N. Sheikh;R. Wildman;J. M. Huntley

Experimental investigation and kinetic-theory-based model of a rapid granular shear flow

快速颗粒剪切流的实验研究和基于动力学理论的模型

• DOI: 10.1017/s0022112008000700
• 发表时间: 2008
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: WILDMAN R

Granular dynamics of a vibrated bed of dumbbells

哑铃振动床的颗粒动力学

• DOI: 10.1140/epjst/e2010-01189-y
• 发表时间: 2010
• 期刊: The European Physical Journal Special Topics
• 作者: Wildman R