Multiphase multilayer viscoplastic displacement flows: Controlling interfacial patterns

多相多层粘塑性位移流：控制界面模式

• 批准号: RGPIN-2022-03358
• 负责人: Taghavi, SeyedMohammad
• 金额: $ 4.01万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=753757
• 关键词: Multiphase; multilayer; viscoplastic; displacement; flows

The displacement of one fluid by another fluid of usually different properties occurs in a variety of natural and industrial applications. The hard-to-achieve objective is typically to completely remove the in-situ displaced fluid, via the imposed displacing fluid, while the fluid-fluid interface participates actively in the flow dynamics. Relevant to this fundamentally-challenging fluid mechanics problem, our research program's long-term vision revolves around developing advanced flow models/simulations and novel experiments, to improve Canadian industrial processes dealing with displacement flows, whose complex, multiphase, multilayer, interfacial and non-Newtonian nature are critical. Examples include displacement flows in removal/cleaning processes in the plug and abandonment of oil&gas wells, as well as various processes in aluminum production, cleaning/removal and decontamination, and injection molding. The fluids and materials used in these and similar industrial processes frequently exhibit non-Newtonian viscoplastic properties, for which the rheology becomes even more complex when thixotropy and viscoelastic transient responses are considered. These complexities, along with highly non-linear and hard-to-predict interfacial behaviour, make it extremely hard to control these complex interfacial displacement flows. In this context, our vision is to develop ground-breaking methods and strategies to effectively control the advancement and penetration of multiphase, multilayer viscoplastic fluids into one another. This can be realized, for example, via controlling/manipulating the spatiotemporal interface evolution and hindering/triggering interfacial phenomena, to achieve desired displacement flow patterns/regimes, according to our design and needs. This in return enables us to precisely predict/design complex displacement behaviours in a broad range of industrial processes, and reduce concomitant negative impacts of unpredictability/uncontrollability of these flows. In this framework, our specific short-term objectives are to propose transformative controlling displacement strategies, via the analysis of (i) immiscible viscoplastic displacements in rotating pipes, (ii) displacements in flow geometries with superhydrophobic walls, and (iii) thixo-elasto-visco-plastic displacement flows. These fascinating research topics proposed are investigated through novel complex fluid experiments (e.g. laser/camera/ultrasound imaging), rigorous semi-analytical mathematical models (lubrication, asymptotic and stability analysis models), and advanced computational fluid dynamics methods relying on open-source codes. Through engaging both graduate and undergraduate students, these highly qualified personnel trained in our research program experience a unique educational environment, designed for mathematical and experimental modeling of complex flows, i.e. a research area for which the demand for expertise and skills is increasing.

一种通常不同特性的流体将一种流体的位移发生在多种自然和工业应用中。难以实现的目标通常是通过施加的流体流体完全去除原位流体流体，而流体流体界面则积极参与流动动力学。与这种从根本上挑战的流体力学问题有关的问题相关，我们的研究计划的长期视力围绕着开发高级流程模型/仿真和新颖实验，以改善与流离失所流相关的加拿大工业流程，其复杂，多相，多相，多层，多层，跨性别和非纽顿性质至关重要。例子包括在插头和放弃油气井的去除/清洁过程中的位移流，以及铝制生产中的各种过程，清洁/去除和去污染以及注入成型。这些和类似工业过程中使用的流体和材料经常表现出非牛顿粘膜塑性的特性，当考虑到触变和粘弹性瞬态响应时，流动性变得更加复杂。这些复杂性以及高度非线性和难以预测的界面行为，使控制这些复杂的界面位移流非常困难。在这种情况下，我们的愿景是开发开创性的方法和策略，以有效地控制多层，多层粘膜流体的进步和渗透。例如，可以根据我们的设计和需求来实现所需的位移流动模式/机制，从而可以通过控制/操纵空间时间界面进化和阻碍/触发界面现象来实现这一点。作为回报，我们能够在广泛的工业过程中准确预测/设计复杂的位移行为，并减少这些流动的不可预测性/无法控制性的负面影响。在此框架中，我们的特定短期目标是通过分析（i）旋转管道中不混溶的粘膜塑料位移，（ii）用超疏水性壁的流量位移，（ii）（iii）Thixo-elasto-visco-visco-plastic-plastic-Plastic-plastic-loverate forp来提出变革性控制位移策略。通过新颖的复杂流体实验（例如激光/摄像头/超声成像），严格的半分析数学模型（润滑，不对称和稳定性分析模型）以及依赖开放源代码的高级计算流体动力学方法来研究这些引人入胜的研究主题。通过聘请研究生和本科生，这些在我们的研究计划中培训的高素质的人员体验了一种独特的教育环境，专为复杂流量的数学和实验性建模而设计，即对专业知识和技能的需求正在增加的研究领域。