CAREER: Microflow of highly viscous fluids: mixing and dissolution processes

1150389 Cubaud高粘度流体代表了能源技术和生活许多方面必不可少的广泛材料类别。我们从日常观察中知道，粘性流体是粘稠的。它们倾向于附着在表面，当被操纵时形成丝状结构。它们的大粘度系数使它们缓慢且难以置换，并且将它们与其他材料混合需要很长时间。如今，有限的化石能源供应需要开发用于在多个长度尺度上精细处理粘性材料和气态副产品的创新方法。该项目结合了教育和研究活动，旨在扩大新的和改进的小规模高粘性流体操纵的科学基础。将采用新的策略，使用高压微流体装置快速混合和富集厚材料。提出了两个研究方向。第一种方法涉及在连续流动配置中混合低粘度和高粘度可混溶流体。粘性分层的形成和稳定性的润滑线程对扩散，惯性和粘性屈曲现象将实验和数值模拟在有限的微观几何形状。第二部分研究了二氧化碳在粘性流体中的微尺度溶解过程。溶解气泡的分段微流将被检查用于浸渍粘性物质和解锁多孔介质中的碳封存的基本原理。这项工作将导致预测模型的发展，并提高我们的理解和实际使用的液/液和液/气多相流中存在的扩散界面在smallscale.Intellectual优点：这个项目将提供一个全面的和统一的图片粘性流体的流动行为与可混溶润滑剂。一系列精心设计的实验，理论论证和数值模拟将产生一个可靠的和系统的知识，高粘度微流和粘性屈曲不稳定性的新兴属性。碳酸盐多相流将在孔隙水平上在广泛的流体性质和操作参数范围内进行表征。这项工作将扩大前沿的理解在流体动力学和开辟一个新时代的流体处理能力。更广泛的影响：该计划将提供大量的教育机会，为学生的多样性，包括代表性不足，高中，本科和研究生。PI将致力于教育和培养学生在流体科学的前沿研究。在该项目期间取得的成果将纳入方案研究所各级的外联和教学活动。这项工作将有助于改善高粘度流体的连续流动混合设备，并为石化产品和粘性生物材料的微流管理，废油的回收利用以及碳基副产品的捕获提供新的专业知识。

1150389CubaudHigh-viscosity fluids represent a broad class of materials that are essential to many aspects of energy technologies and life. We know from everyday observation that viscous fluids are sticky and thick. They tend to attach to surfaces and they form filamentous structures when manipulated. Their large viscosity coefficient makes them slow and difficult to displace, and blending them with other materials requires a long time. Today, the limited supplies of fossil energy resources require the development of innovative methods for finely handling viscous materials and gaseous byproducts over multiple length scales. This project combines educational and research activities designed to expand the scientific foundations for new and improved manipulations of highly viscous fluids at the small scale. Novel strategies will be deployed to rapidly mix and enrich thick materials using high-pressure microfluidic devices. Two research thrusts are proposed. The first involves blending low- and high-viscosity miscible fluids in continuous flow configurations. The formation of viscous stratifications and the stability of lubricated threads against diffusion, inertia, and viscous buckling phenomena will be experimentally and numerically modeled in confined microgeometries. The second investigation focuses on microscale dissolution processes of carbon dioxide with viscous fluids. Segmented microflows of dissolving gas bubbles will be examined for impregnating viscous substances and unlocking the fundamentals of carbon sequestration in porous-like media. This work will lead to the development of predictive models and improve our understanding and practical use of liquid/liquid and liquid/gas multiphase flows in the presence of diffusive interfaces at the small scale.Intellectual merit: This project will provide a comprehensive and unifying picture of the flow behavior of viscous fluids with miscible lubricants. A series of carefully designed experiments, theoretical arguments, and numerical modeling will generate a reliable and systematic knowledge concerning the emerging properties of high-viscosity microflows and viscous buckling instabilities. Carbonated multiphase flows will be characterized at the pore level over a wide range of fluid properties and operating parameters. This work will expand the frontier of understanding in fluid dynamics and open up a new era of fluid processing capabilities.Broader impacts: This program will offer substantial educational opportunities for a diversity of students, including underrepresented, high school, undergraduate, and graduate students. The PI will dedicate his efforts to educate and train students to cutting edge research in fluid science. Results developed during this project will be incorporated into the PI's outreach and teaching activities at every level. This work will help improve continuous flow-based mixing apparatuses for high-viscosity fluids and offer new expertise for the microflow management of petrochemical products and viscous biomaterials, the recycling of used oils, and the capture of carbon-based byproducts.