Browsing by Author "Vaartstra, Geoffrey"
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Capillary-fed, thin film evaporation devices
Vaartstra, Geoffrey; Zhang, Lenan; Lu, Zhengmao; Díaz-Marín, Carlos D; Grossman, Jeffrey C; e.a. (AIP Publishing, 2020)© 2020 Author(s). Evaporation plays a critical role in a range of technologies that power and sustain our society. Wicks are widely used as passive, capillary-fed evaporators, attracting much interest since these devices ... -
Kinetics of Heat and Mass Transfer Near the Liquid-Vapor Interface
Vaartstra, Geoffrey (Massachusetts Institute of Technology, 2023-06)Evaporation and condensation can be seen in our daily lives but also play a key role in technologies that drive our modern society, such as power generation, distillation, refrigeration, and thermal management for buildings ... -
A Learning-Based Thermal Simulation Framework for Emerging Two-Phase Cooling Technologies
Yuan, Zihao; Vaartstra, Geoffrey; Shukla, Prachi; Lu, Zhengmao; Wang, Evelyn; e.a. (IEEE, 2020-03)© 2020 EDAA. Future high-performance chips will require new cooling technologies that can extract heat efficiently. Two-phase cooling is a promising processor cooling solution owing to its high heat transfer rate and ... -
Microtube Surfaces for the Simultaneous Enhancement of Efficiency and Critical Heat Flux during Pool Boiling
Song, Youngsup; Gong, Shuai; Vaartstra, Geoffrey; Wang, Evelyn N (American Chemical Society (ACS), 2021)Boiling is an essential process in numerous applications including power plants, thermal management, water purification, and steam generation. Previous studies have shown that surfaces with microcavities or biphilic ... -
Numerical validation of the dusty-gas model for binary diffusion in low aspect ratio capillaries
Vaartstra, Geoffrey; Lu, Zhengmao; Grossman, Jeffrey C; Wang, Evelyn N (AIP Publishing, 2021) -
Rational Fabrication of Nano-to-Microsphere Polycrystalline Opals Using Slope Self-Assembly
Díaz-Marín, Carlos D; Shetty, Rishabh M; Cheung, Samantha; Vaartstra, Geoffrey; Gopinath, Ashwin; e.a. (American Chemical Society (ACS), 2021)Self-assembly of artificial opals has garnered significant interest as a facile nanofabrication technique capable of producing highly ordered structures for optical, electrochemical, biomolecular, and thermal applications. ... -
Revisiting the Schrage Equation for Kinetically Limited Evaporation and Condensation
Vaartstra, Geoffrey; Lu, Zhengmao; Lienhard, John H; Wang, Evelyn N. (ASME International, 2022-05-24)<jats:title>Abstract</jats:title> <jats:p>The Schrage equation is commonly used in thermofluid engineering to model high-rate liquid–vapor phase change of pure fluids. Although shortcomings of this simple ... -
Two-Phase Vapor Chambers with Micropillar Evaporators: A New Approach to Remove Heat from Future High-Performance Chips
Yuan, Zihao; Vaartstra, Geoffrey; Shukla, Prachi; Said, Mostafa; Reda, Sherief; e.a. (IEEE, 2019-05)© 2019 IEEE High power densities lead to thermal hot spots in modern processors. These power densities are expected to reach kW/cm2 scale in future high-performance chips and this increase may significantly degrade performance ... -
A unified relationship for evaporation kinetics at low Mach numbers
Lu, Zhengmao; Wilke, Kyle L.; Vaartstra, Geoffrey; Wang, Evelyn N. (Springer Science and Business Media LLC, 2019-05)We experimentally realized and elucidated kinetically limited evaporation where the molecular gas dynamics close to the liquid–vapour interface dominates the overall transport. This process fundamentally dictates the ...