Collaborative Research: Multiscale study of oscillating flow and multiphase heat transfer in porous media

合作研究：多孔介质中振荡流和多相传热的多尺度研究

• 批准号: 2414527
• 负责人: Leitao Chen
• 金额: $ 13.26万
• 依托单位: Embry-Riddle Aeronautical University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2414527&HistoricalAwards=false
• 关键词: Collaborative; Research; Multiscale; study; oscillating

In our evolving energy landscape, it is crucial to maximize the efficiency of energy technologies and understand the impact of fossil fuel extraction and carbon storage. Technologies that are central to this - subsurface remediation, geothermal energy systems, batteries, fracking, etc. - are governed by complicated flow through porous media, which is not currently well understood. A porous medium has multiple, convoluted pathways of various sizes for fluid flow through an otherwise solid material. The flows can be single phase (liquid/gas) or multiphase, and can occur at constant temperature or with heat transfer. The flow can occur in a single direction, or oscillate. When all of these are combined, nonlinear effects can result, which could improve the behavior of a system or negatively impact performance, depending on how the effects are propagated and understood. The major objective of this work is to experimentally study oscillating and multiphase flows in porous media, and then develop a numerical approach that can be used to gain further insight into the fundamental behavior, thereby improving energy efficiency, and lowering both economic costs and environmental impacts. Although porous media flow sounds esoteric, it occurs in many daily applications (brewing coffee, etc.). Therefore, this project is well suited for pre-college outreach, and several topics related to it will be used to engage underrepresented students from K-12 classrooms. In addition, this project will promote STEM education via an inter-college educational collaboration for undergraduate design projects, and demonstration units about porous media flows will be created for pre-college classrooms.This research will combine experimental and numerical techniques to describe the effects of the physical porous structure, the flow/heat transfer boundary layer (including a comparison between oscillation and non-oscillation) and the variations in wettability from materials and manufacturing process. Experimentally, naturally-occurring and engineered porous media will be scanned, analyzed, and catalogued in a database, and an experimental platform will also be designed and developed to study in situ oscillating and multiphase transport phenomena inside porous media using the Neutron Imaging Facility at Oak Ridge National Lab. This experimental work will be coupled with numerical simulations through parallel development of a multiphase discrete Boltzmann method model and a hybrid discrete/lattice Boltzmann method model to capture kinetic behaviors and multiscale interactions, in order to elucidate the fundamental behavior of oscillating multiphase thermofluidic phenomena and fluid-solid interactions. The knowledge developed in this project will, in turn, be used to improve the design of porous structures in a variety of energy applications, including thermal storage in concentrated solar power plants, carbon retention in rock structures, and fuel cells.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在我们不断发展的能源环境中，至关重要的是最大化能量技术的效率并了解化石燃料提取和碳储存的影响。对此至关重要的技术 - 地下修复，地热能系统，电池，压裂等 - 由复杂的流通媒体控制，目前尚不清楚。多孔培养基具有多种多种尺寸的综合途径，用于流体通过原本固体材料。流可以是单相（液体/气体）或多相，并且可以在恒温或传热时发生。流动可以沿单个方向发生，也可以振荡。当所有这些结合在一起时，可能会导致非线性效应，这可能会改善系统的行为或对性能产生负面影响，具体取决于效果的传播和理解方式。这项工作的主要目的是实验研究多孔介质中的振荡和多相流，然后开发一种数值方法，可用于进一步了解基本行为，从而提高能源效率，并降低经济成本和环境影响。尽管多孔介质的流程听起来深奥，但它发生在许多日常应用中（酿造咖啡等）。因此，该项目非常适合大学前的外展活动，与该项目相关的几个主题将用于吸引来自K-12教室的代表性不足的学生。此外，该项目将通过大学间设计项目的大学间的教育合作来促进STEM教育，并将为预科课堂创建有关多孔媒体流动的演示单位。这项研究将结合实验和数值技术，以描述物理性多孔结构，流量/热传递边界层的效果（包括启动和非启动之间的比较）和启动之间的效果），以​​及在振动之间进行比较），并在启动之间进行了比较）。在实验上，将在数据库中扫描，分析和分类自然和工程的多孔培养基，并且还将设计和开发实验平台，以使用Oak Ridge National Lab的中子成像设施进行多孔介质中的原位振荡和多相传输现象进行设计和开发。这项实验工作将与数值模拟结合，通过平行开发多相离散的Boltzmann方法模型和混合离散/晶格Boltzmann方法模型，以捕获动力学行为和多尺度相互作用，以阐明振动型多性型多性酚类相互作用的基本行为。反过来，该项目中开发的知识将被用来改善各种能源应用中多孔结构的设计，包括在集中太阳能发电厂中的热量存储，岩石结构中的碳保留和燃料电池。这一奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子的优点和广泛的影响来评估的。