Interfacial and droplet dynamics at reduced gravity environment

重力环境下的界面和液滴动力学

• 批准号: RGPIN-2021-03567
• 负责人: Waghmare, Prashant
• 金额: $ 3.35万
• 依托单位: Carleton University
• 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=760305
• 关键词: Interfacial; droplet; dynamics; reduced; gravity

Space technology applications rely heavily on principles of fluid physics, with interfacial forces as a major driver. A key factor in success and longevity of space and planetary surface missions is a fundamental understanding of how interfacial forces dominate fluid physics in reduced gravity. The long-term vision of this proposed research program is to train highly qualified personnel (HQP) for understanding the fundamentals of interfacial fluid physics at reduced gravity. They will develop a universal platform for fundamental understanding of interfacial fluid dynamics, at liquid-fluid and liquid-solid interfaces, in reduced gravity environments. Also, experience the microgravity environment while performing experiments in the reduced gravity that includes the necessary training and certification for such a unique skill. Our vision will be achieved through developing a universal platform to determine changes in specific aspects of interfacial fluid dynamics in reduced gravity. To reach our long-term objective of a universal platform, compatible with the space environment for studying and analyzing diverse phenomena dominated by interfacial forces, we have planed the training program in three activities resulting in at least four flight campaigns. Each experiment will be replicated in reduced gravity and earth gravity conditions. The parabolic flight campaigns will be arranged for simulated reduced gravity environments. This 5-year research program is the foundation for a unique training program for HQPs (3 PhD and 5 MSc). They will design experimental platforms and scrutinize the underlying physics of interfacial forces in conditions of both earth gravity and reduced gravity. Each will participate in at least one parabolic flight campaign, with 15-20 opportunities to perform experiments in reduced gravity. Our novel work in reduced gravity will also generate an abundance of new physics to explore, such as precise drop deposition and solidification of non-Newtonian fluids or colloidal solutions containing different types of particles. Results will advance knowledge in space science and technology through fundamental understanding of interfacial fluid and drop dynamics. Colloid suspensions of particles, fibres, magnetic particles and electrolytes are widely used in numerous applications that incorporate an abundance of processes governed by fluid physics and dominated by interfacial forces. The outcome of this research and developed platform has potential to become the platform dedicated to research on interfacial fluid dynamic at reduced gravity environment. Together, our platform and new knowledge of fluid dynamics in reduced gravity can support applications of colloidal materials in space applications, such as 3D printing of essential parts during missions and extending functionality of parts as in 4D printing (transforming 3D printed parts with environmental stimuli and external energy inputs).

空间技术应用在很大程度上依赖于流体物理原理，其中界面力是一个主要驱动因素。空间和行星表面任务成功和长寿的一个关键因素是对界面力如何在重力降低时主导流体物理的基本理解。本研究计划的长远目标是培养理解低重力下界面流体物理基本原理的高素质人才。他们将开发一个通用的平台，以基本理解界面流体动力学，在液体-流体和液体-固体界面，在减少重力的环境。此外，体验微重力环境，同时在减少重力下进行实验，包括必要的培训和认证，这样一个独特的技能。我们的愿景将通过开发一个通用平台来实现，以确定重力降低时界面流体动力学特定方面的变化。为了实现我们的长期目标，即建立一个与空间环境兼容的通用平台，用于研究和分析由界面力主导的各种现象，我们计划了三项活动的训练计划，至少进行了四次飞行活动。每个实验都将在失重和地球重力条件下重复。抛物线飞行活动将被安排在模拟失重环境中。这个为期5年的研究计划是hqp（3个博士和5个硕士）独特培训计划的基础。他们将设计实验平台，并仔细研究在地球重力和减重力条件下界面力的潜在物理特性。每个人都将参加至少一次抛物线飞行活动，有15-20次机会在失重状态下进行实验。我们在减少重力方面的新工作也将产生大量新的物理学探索，例如精确的滴沉积和凝固非牛顿流体或含有不同类型颗粒的胶体溶液。结果将通过对界面流体和液滴动力学的基本理解来推进空间科学和技术的知识。颗粒、纤维、磁性颗粒和电解质的胶体悬浮液被广泛应用于许多应用中，这些应用包含了由流体物理控制和由界面力主导的大量过程。该研究成果和开发的平台有可能成为专门研究轻重力环境下界面流体动力学的平台。总之，我们的平台和减少重力下流体动力学的新知识可以支持胶体材料在空间应用中的应用，例如任务期间基本部件的3D打印和扩展部件的功能，如4D打印（通过环境刺激和外部能量输入转换3D打印部件）。