Workshop on inertial particles in turbulence: theory and applications from engineering to geophysics

湍流中惯性粒子研讨会：从工程到地球物理学的理论与应用

基本信息

批准号：
EP/H002774/1
负责人：
John Vassilicos
金额：
$ 2.74万
依托单位：
Imperial College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2009
资助国家：
英国
起止时间：
2009 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FH002774%2F1
关键词：
Workshop inertial particles turbulence theory

项目摘要

It is well known that even in a homogeneous turbulent flow, inertial particlescan form clusters, or inhomogeneities, on account of the small-scale variationof the homogeneous turbulent fluid and the finiteresponse time of the inertial particles to these changes.This generates a rich variety of patterns that have been the subjectof much research over several decades. There aremany contexts in which this problem manifests itself, in fluidised bedswhich are of interest to the chemical engineering and nuclearpower industries, in sedimentation in rivers, in spray droplets in engines,in the creation of powders in the pharmaceutical industryand in the formation of clouds. There is thus considerable expertiseon this issue across a wide range of disciplines.Despite a wealth of understanding on inertial particles in turbulencedeveloped over many years of research, there remain several outstandingproblems. These include the role of acceleration, the effect of collisionsand how the particle statistics vary with the Stokes number, the dimensionlessnumber which characterises how closely the inertial particlesfollow the turbulent fluid. In various industrial, environmental andgeophysical situations forces such as gravity, centrifugaland Coriolis forces and even electromagnetic forces canbecome important and may change the variation of the particlestatistics with the Stokes number. A further issue in both engineeringand geophysical situations is the impact of these inhomogeneities onevaporation of droplets and heat transfer including radiative heating.The aim of this workshop is to bring together those working oninertial particles in turbulence in both engineering and geophysicalsituations to assess the current state of knowledge,plan future research and foster collaboration.It is through the interaction of these diverse but overlapping disciplines thatwe hope to produce some answers to the questions posed above.

众所周知，即使在均匀的湍流中，惯性的颗粒物形成簇或不均匀性，由于均匀的湍流的较小差异，惯性粒子的分数时间和这些变化的惯性粒子的分数时间。这是多种多样的模式，这些模式已经研究了许多学期。在流化的Bedswhich中，在河流和核能工业中，在河流的沉积中，发动机的喷雾液滴，在制药行业创建粉末和云形成的粉末，在河流的沉积中，在河流的沉积中，在河流的沉积中引起了这个问题的兴趣。因此，在广泛的学科中有很多专业的这个问题。尽管在多年的研究中对湍流开发的惯性粒子有很多了解，但仍有几个出色的问题。这些包括加速度的作用，碰撞的效果和粒子统计的效果如何随stokes数量而变化，二量无量，以表征惯性颗粒的程度如何。在各种工业，环境和地球物理状况中，例如重力，离心机科里奥利力，甚至电磁力canbecome都很重要，并且可能会因stokes数量而改变特定量的变化。在两种工程和地球物理情况下的另一个问题是这些不均匀性的影响和液滴和热传递的影响，包括辐射供暖。该研讨会的目的是将工作型在工程和地球物理学的湍流中工作的人汇集在一起，以评估当前的知识和差异，以使这些与众不同，以使其与众不同。为上述问题提供一些答案。