Workshop on dense granular flows

在实际情况中，例如在工业中，分离和混合是很重要的，由于存在多分散性、各向异性和复杂的颗粒形态，理解颗粒流动是很复杂的。在试图对这样的系统进行建模时，除了可能通过经验参数拟合之外，许多这些特征通常被忽略。发展一个包括这些影响的理论是一个相当大的挑战，而且由于行为的复杂性往往使实践者和理论家难以确定影响的关键因素，因此更加困难。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许多尺寸的系统，但就目前而言，这种努力是不切实际的，如何对具有连续尺寸分布的系统建模仍然是一个悬而未决的问题。在这样的流中有许多有趣的细节，例如，非均分，它混淆了统计物理标准技术的应用，并且需要新的数学公式来捕获所涉及的复杂碰撞细节。很明显，粒子通常被处理的具有挑战性的环境和需要解决的复杂的非平衡物理的结合，只能通过一种涉及到对实际困难和基本原理的理解的方法，以及一种整合实验、理论、模拟和实践的方法来解决。本次研讨会旨在促进这种整合，并提供一个平台，通过这个平台，研究人员和实业家的关键团体可以合作，显著推进我们对颗粒物系统的控制。为了达到会议的目的，我们计划了一个研讨会的范围，它允许一个平台来提出和讨论一系列问题。讲习班的安排将使尽可能多的参加者能够通过介绍或张贴海报以及提供广泛的讨论和联网时间作出贡献。我们将按照研讨会的形式，上午进行主题演讲和主题演讲，下午的会议将进行领导、圆桌讨论、网络会议和海报展示。会谈将设定场景，提出问题和可能的解决方案，而讨论阶段将促进互动和合作。

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.