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FLOW OF FOAM THROUGH PROCESSING EQUIPMENT

泡沫通过加工设备的流动

基本信息

批准号：
1790013
负责人：
金额：
--
依托单位：
University of Birmingham
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2016
资助国家：
英国
起止时间：
2016 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1790013
关键词：
FLOW FOAM THROUGH PROCESSING EQUIPMENT

项目摘要

Foams are structured two-phase fluids in which gas bubbles are separated by interconnecting thin liquid films and Plateau borders which denote the regions of intersection of the thin films. They represent an important class of structured fluids possessing a complex rheology and flow behaviour strongly dependent upon local structure and chemical composition. The nature of the foam, i.e. its texture, foamability, stability, and its overall rheological and flow properties can determine both the economic and technical successes of the industrial process concerned.Foam flow through processing equipment usually affects the structure of the foam and its properties. In many industrial processes foams are forced to flow through narrow intricate passages such as contractions, expansions and orifices. These flows generate complex phenomena that can have important effects on foam structure and can lead to dramatic instabilities and morphological transformations with serious practical implications for foam sustainability during flow and processing. The flow characteristics of the foam at bubble scale are important, but the topological changes incurred and their effects on the rheology and flow of the foam are poorly understood. This project seeks to address this lack of understanding by studying aspects related to the flow, stability and behaviour of foams through channels containing complex geometries.

泡沫是结构化的两相流体，其中气泡通过互连的液体薄膜和表示薄膜相交区域的高原边界而分离。它们代表了一类重要的结构化流体，具有复杂的流变学和流动行为，强烈依赖于局部结构和化学成分。泡沫的性质，即其质地、发泡性、稳定性及其整体流变性和流动性，可以决定相关工业过程的经济和技术成功。通过加工设备的泡沫流通常会影响泡沫的结构及其性能。在许多工业过程中，泡沫被迫流过狭窄而复杂的通道，例如收缩、膨胀和孔口。这些流动产生复杂的现象，可能对泡沫结构产生重要影响，并可能导致剧烈的不稳定和形态转变，对流动和加工过程中泡沫的可持续性产生严重的实际影响。泡沫在气泡尺度上的流动特性很重要，但所产生的拓扑变化及其对泡沫流变性和流动性的影响却知之甚少。该项目旨在通过研究与泡沫通过包含复杂几何形状的通道的流动、稳定性和行为相关的方面来解决这种理解的缺乏。