Turbulence modulation in liquid-continuous mixtures

加拿大西部的大多数资源工业依赖于各种长度的管道来混合或移动液体、气体和固体的复杂混合物。一些例子包括油砂开采和沥青分离、硬岩开采中的尾矿处理、原油生产、核能发电、农用化学品生产以及疫苗生产和运送。通常，湍流混合是最重要的，因为混合物必须相对良好地分散在整个悬浮介质中。在某些情况下，具有非常具体定义的分散相特性的混合物必须作为最终产品或作为下游工艺的原料输送。人们普遍认识到，流动的性质，即湍流，强烈地影响分散相的状态：例如，分散相的浓度分布，或分散气体或液体的尺寸分布。一个或多个分散相的存在影响整体流动结构也是事实。分散相对流动结构的具体影响取决于分散相的特性，包括颗粒、液滴或气泡的浓度、密度和直径。拟议的研究计划将研究多相，液体连续混合物的管道输送。将研究液-液和液-固混合物。对于稀混合物和高浓度混合物（高达40%体积），将评估分散相对湍流强度的影响。这项研究计划的结果将推进目前对多相混合物管道运输的理解，并将有助于提高可开采油砂中的沥青回收率，有效应用管道运输原位（SAGD）生产设施，并改善对环境负责的尾矿混合物运输和放置的流动保证。

Most western Canadian resource industries rely on pipelines of various lengths to mix or move complex mixtures of liquids, gases and solids. A few examples include oil sand mining and bitumen separation, tailings disposal in hard-rock mining, crude oil production, nuclear power generation, agrichemical production and vaccine production and delivery. Often, turbulent mixing is of primary importance because of a mixture must be relatively well dispersed throughout the suspending medium. In some cases, a mixture with very specifically defined dispersed phase characteristics must be delivered as a final product or as a feedstock to a downstream process. It is widely recognized that the nature of the flow, i.e. turbulence, strongly affects the state of the dispersed phase: for example, the concentration distribution of the dispersed phase, or the size distribution for dispersed gases or liquids. It is also true that the presence of one or more dispersed phases affects the overall flow structure. The specific effect of the dispersed phase on the flow structure depends on the characteristics of the dispersed phase, including concentration, density and diameter of the particles, droplets or bubbles. The proposed research program will examine the pipeline transport of multiphase, liquid-continuous mixtures. Both liquid-liquid and liquid-solid mixtures will be studied. The effect of the dispersed phase on turbulent intensity will be evaluated for both dilute and highly concentrated (up to 40% by volume) mixtures. The results of this research program will advance the current understanding of pipeline transport of multiphase mixtures and will contribute to improved bitumen recovery from mineable oil sands, effective application of pipeline transport in in-situ (SAGD) production facilities and improved flow assurance for the environmentally responsible transport and placement of mineral tailings mixtures.