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

On the Development of a Novel Approach in Modelling of Turbulent Pulsating Flows

湍流脉动流建模新方法的发展

基本信息

批准号：
EP/S037292/1
负责人：
Mehdi Seddighi
金额：
$ 33.06万
依托单位：
Liverpool John Moores University
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2020
资助国家：
英国
起止时间：
2020 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FS037292%2F1
关键词：
Development Novel Approach Modelling Turbulent

项目摘要

Unsteady flows in which the bulk or free-stream velocity varies with time arise in many engineering systems / natural environment. Examples of applications and the challenges that they pose are highlighted in numerous recent publications include: i) The pulsatile blood flows in carotid and coronary arteries, for example, where a majority of atherosclerosis is observed; ii) The transient events at a nuclear power plant during various hypothetical fault conditions are the most vulnerable conditions which impose severe constraints on plant operations. The project will establish a new approach in study pulsating flow which will fundamentally change how unsteady turbulent flow is perceived leading to fundamental improvements in: a) understanding of pulsating flows; b) simulations of unsteady flows using turbulence modelling, b) turbulent flow control and the way that the unsteady friction models are formulated. This will result in improved: predictive capability of a blood periodic transient flow; drag reduction that utilises pulsating flows, safety and economy of nuclear reactors; efficiency of turbomachinery and wind turbines, water resources efficiency and protection of coasts. Moreover, the projects will result a high-fidelity, high-scalability in-house CFD (Computational Fluid Dynamics) package which will support future collaborations.A comprehensive programme of numerical simulations will be conducted to study the flow at wide range of pulsating parameters and Reynolds numbers. An in-house DNS (direct numerical simulations) / LES (large eddy simulations) package will be used to investigate detailed flow structure and turbulence statistics for the flow. Results of the cases associated with pulsatile blood flows in arteries, will be analysed against experimental data provided by the Translational Biomedical Research Centre, University of Bristol, who will act as the project partner to the research.

在许多工程系统或自然环境中，都会出现体积或自由流速度随时间变化的非定常流动。在许多最近的出版物中强调了应用的例子和它们所带来的挑战，包括：i）例如，颈动脉和冠状动脉中的脉动血流，其中观察到大多数动脉粥样硬化; ii）在各种假设故障条件下，核电厂的瞬态事件是最脆弱的条件，其对工厂操作施加了严重的限制。该项目将建立一种研究脉动流的新方法，这将从根本上改变人们对非定常湍流的看法，从而从根本上改善以下方面：a）对脉动流的理解; B）使用湍流建模模拟非定常流; B）湍流控制和非定常摩擦模型的制定方式。这将改善：血液周期性瞬变流的预测能力;利用脉动流的减阻、核反应堆的安全性和经济性;涡轮机和风力涡轮机的效率、水资源效率和海岸保护。此外，这些项目将产生一个高保真度，高可扩展性的内部CFD（计算流体动力学）包，这将支持未来的合作。将进行一个全面的数值模拟计划，以研究在广泛的脉动参数和雷诺数范围内的流动。内部DNS（直接数值模拟）/ LES（大涡模拟）软件包将用于研究详细的流动结构和湍流统计数据。与动脉中脉动血流相关的病例结果将根据布里斯托大学转化生物医学研究中心提供的实验数据进行分析，该中心将作为该研究的项目合作伙伴。