Collaborative Research: Scale-free continuum percolation of bubbles as a universal mechanism of the boiling crisis

合作研究：气泡的无标度连续渗透作为沸腾危机的普遍机制

基本信息

批准号：
2018995
负责人：
Md Mahamudur Rahman
金额：
$ 16万
依托单位：
University of Texas at El Paso
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-09-01 至 2023-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2018995&HistoricalAwards=false
关键词：
Collaborative Research Scale free continuum

项目摘要

Boiling heat transfer is an exceptionally effective heat removal process and plays a critical role in electronics cooling, chemical processing, power generation, HVAC, and water purification. However, boiling is susceptible to a degradation, known as a boiling crisis, which may result in cooling system failures. Understanding this boiling crisis is key to the development and safe operations of nuclear reactors and computer processing units that rely on liquid-vapor two-phase cooling. Despite decades of research, the mechanism triggering a boiling crisis remains unclear and controversial. In this project, a new stochastic model is proposed based on the analogy between the boiling process and the formation of traffic jams. The project seeks to offers a novel perspective of boiling heat transfer to the thermal community. It also provides multidisciplinary STEM training opportunities for graduate and undergraduate students, as well as young researchers.This project will investigate boiling crises as a critical transition in the bubble coalescence process. The instability will be captured with a stochastic percolation model based on four fundamental boiling parameters: bubble wait time and growth time, bubble footprint radius, and nucleation site density. With a critical combination of these four parameters, the boiling crisis occurs when all the bubbles suddenly merge together. This hypothesis has recently been validated on smooth surfaces, in both pool and flow boiling conditions, as well as preliminary results on engineered surfaces. In the proposed work, the universality of the hypothesis will be tested by analyzing the boiling behavior of various surfaces and fluids, at different pressures, and under diverse flow conditions. The project will be accomplished through novel boiling experiments that combine state-of-the-art infrared diagnostics and post-processing algorithms, which enable measurements of time-dependent temperature and heat flux distributions on the boiling surface, as well as other boiling heat transfer parameters. The results of the experimental investigations will be shared with the thermal science and engineering community to support the evaluation of other models and stimulate the development of new ones.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.

沸腾的传热是一种非常有效的去除过程，在电子冷却，化学加工，发电，HVAC和水净化中起着至关重要的作用。但是，沸腾易受降解，称为沸腾的危机，这可能导致冷却系统失败。了解这种沸腾的危机是依靠液态蒸气两相冷却的核反应堆和计算机加工单元的开发和安全操作的关键。尽管进行了数十年的研究，但引发沸腾危机的机制仍然不清楚且引起争议。在这个项目中，根据沸腾过程与交通拥堵的形成之间的类比提出了一个新的随机模型。该项目旨在提供向热社区沸腾传热的新颖观点。它还为研究生和本科生以及年轻的研究人员提供了多学科的STEM培训机会。该项目将调查沸腾的危机，这是泡沫结合过程中的关键过渡。基于四个基本沸腾参数的随机渗透模型将捕获不稳定性：气泡等待时间和生长时间，气泡足迹半径和成核位点密度。通过这四个参数的临界组合，当所有气泡突然合并在一起时，就会发生沸腾危机。该假设最近在池和流沸腾条件下的平滑表面上得到了验证，以及工程表面的初步结果。在拟议的工作中，将通过分析各种表面和流体的沸腾行为，在不同的压力下以及在不同的流动条件下来测试假设的普遍性。该项目将通过新的沸腾实验来完成，该实验结合了最先进的红外诊断和后处理算法，该算法可以测量沸腾表面上的时间依赖性温度和热通量分布，以及其他沸腾的传热参数。实验研究的结果将与热科学和工程社区共享，以支持对其他模型的评估并刺激新模型的发展。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛影响的审查标准来评估值得通过评估来支持的。

项目成果

期刊论文数量（7）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Decrypting the boiling crisis through data-driven exploration of high-resolution infrared thermometry measurements

通过数据驱动的高分辨率红外测温测量探索来解密沸腾危机

DOI：
10.1063/5.0048391
发表时间：
2021
期刊：
Applied Physics Letters
影响因子：
4
作者：
Ravichandran, Madhumitha;Su, Guanyu;Wang, Chi;Seong, Jee Hyun;Kossolapov, Artyom;Phillips, Bren;Rahman, Md Mahamudur;Bucci, Matteo
通讯作者：
Bucci, Matteo

Experimental Characterization of Heat Transfer Mechanisms in the Flow Boiling of Water on Surfaces with Engineered Micropillars

工程微柱表面水流动沸腾传热机制的实验表征

DOI：
发表时间：
2023
期刊：
American Nuclear Society
影响因子：
0
作者：
C. Wang, M. M.
通讯作者：
C. Wang, M. M.

High Pressure Saturated Pool Boiling of Water on Engineered Cylindrical Tubes

工程圆柱管上的高压饱和池水沸腾

DOI：
10.2514/6.2023-0594
发表时间：
2023
期刊：
American Institute of Aeronautics and Astronautics
影响因子：
0
作者：
Rodriguez, Omar H.;Rahman, Md Mahamudur
通讯作者：
Rahman, Md Mahamudur

Critical Heat Flux Enhancement on Cylindrical Tubes With Circumferential Micro-Channels During Saturated Pool Boiling of Water

具有圆周微通道的圆柱管在水饱和池沸腾过程中的临界热通量增强

DOI：
10.1115/imece2022-95846
发表时间：
2022
期刊：
American Society of Mechanical Engineers
影响因子：
0
作者：
Hernandez Rodriguez, Omar;Rahman, Md Mahamudur
通讯作者：
Rahman, Md Mahamudur

Investigation of critical heat flux enhancement on nanoengineered surfaces in pressurized subcooled flow boiling using infrared thermometry

DOI：
10.1080/01457632.2023.2191441
发表时间：
2023-03
期刊：
Heat Transfer Engineering
影响因子：
2.3
作者：
Chia-Yun Wang;G. Su;Olorunsola Akinsulire;Limiao Zhang;Md Mahamudur Rahman;M. Bucci
通讯作者：
Chia-Yun Wang;G. Su;Olorunsola Akinsulire;Limiao Zhang;Md Mahamudur Rahman;M. Bucci