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Author

Tailian Chen

Other affiliations: Gonzaga University
Bio: Tailian Chen is an academic researcher from Purdue University. The author has contributed to research in topics: Nucleate boiling & Heat transfer. The author has an hindex of 9, co-authored 10 publications receiving 395 citations. Previous affiliations of Tailian Chen include Gonzaga University.

Papers
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Journal ArticleDOI
TL;DR: In this paper, high-speed visualizations were performed simultaneously with heat transfer and pressure drop measurements to investigate the physics of flow boiling in parallel microchannel arrays, and local heat transfer measurements, obtained at three flow rates ranging from 35 to 60ml/min, show that at lower heat fluxes, the heat transfer coefficient increases with increasing heat flux.

167 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated flow boiling of perfluorinated dielectric fluid FC-77 in a silicon microchannel heat sink, which contains 60 parallel microchannels each of 100μm width and 389μm depth.

54 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of dissolved air in the dielectric liquid FC-77 on flow boiling in a microchannel heat sink containing ten parallel channels, each 500 m wide and 2.5 mm deep, were experimentally investigated.
Abstract: The effects of dissolved air in the dielectric liquid FC-77 on flow boiling in a microchannel heat sink containing ten parallel channels, each 500 m wide and 2.5 mm deep, were experimentally investigated. Experiments were conducted before and after degassing, at three flow rates in the range of 30– 50 ml/ min. The dissolved air resulted in a significant reduction in wall temperature at which bubbles were first observed in the microchannels. Analysis of the results suggests that the bubbles observed initially in the undegassed liquid were most likely air bubbles. Once the boiling process is initiated, the wall temperature continues to increase for the undegassed liquid, whereas it remains relatively unchanged in the case of the degassed liquid. Prior to the inception of boiling in the degassed liquid, the heat transfer coefficients with the undegassed liquid were 300– 500 % higher than for degassed liquid, depending on the flow rate. The heat transfer coefficients for both cases reach similar values at high heat fluxes 120 kW/ m 2 once the boiling process with the degassed liquid was well established. The boiling process induced a significant increase in pressure drop relative to single-phase flow; the pressure drop for undegassed liquid was measured to be higher than for degassed liquid once the boiling process became well established in both cases. Flow instabilities were induced by the boiling process, and the magnitude of the instability was quantified using the standard deviation of the measured pressure drop at a given heat flux. It was found that the magnitude of flow instability increased with increasing heat flux in both the undegassed and degassed liquids, with greater flow instability noted in the undegassed liquid. DOI: 10.1115/1.2351905

50 citations

Journal ArticleDOI
TL;DR: In this article, the mechanics of bubble incipience on a highly smooth micro-heater submerged in FC-72 liquid was investigated using high-speed imaging and a transient heat flux measurement technique.

42 citations

Journal ArticleDOI
TL;DR: In this article, an experimental study of flow boiling heat transfer in a microchannel heat sink was performed at three flow rates ranging from 30-50ml/min, where the dielectric fluid Fluorinert FC-77 was used as the boiling liquid after it is fully degassed.
Abstract: This paper presents an experimental study of flow boiling heat transfer in a microchannel heat sink. The dielectric fluid Fluorinert FC-77 is used as the boiling liquid after it is fully degassed. The experiments were performed at three flow rates ranging from 30-50ml/min. The heat transfer coefficients, as well as the critical heat flux (CHF), were found to increase with flow rate. Wall temperature measurements at three locations (near the inlet, near the exit, and in the middle of heat sink) reveal that wall dryout first occurs near the exit of the microchannels. The ratio of heat transfer rate under CHF conditions to the limiting evaporation rate was found to decrease with increasing flow rate, asymptotically approaching unity. Predictions from a number of correlations for nucleate boiling heat transfer in the literature are compared against the experimental results to identify those that provide a good match. The results of this work provide guidelines for the thermal design of microchannel heat sinks in two-phase flow

38 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, a composite correlation is developed from a database of 3899 data points from 14 studies in the literature covering 12 different wetting and non-wetting fluids, hydraulic diameters ranging from 016 to 292mm, and confinement numbers from 03 to 40.

333 citations

Journal ArticleDOI
TL;DR: In this paper, a discussion of the possible applications of flow boiling in microchannels in order to highlight the challenges in the thermal management for each application is presented. But, several fundamental issues are still not understood and this hinders the transition from laboratory research to commercial applications.

325 citations

Journal ArticleDOI
TL;DR: In this article, a simultaneous visualization and measurement study has been carried out to investigate effects of inlet/outlet configurations on flow boiling instabilities in parallel microchannels, having a length of 30 mm and a hydraulic diameter of 186 μm.

309 citations

MonographDOI
01 Oct 2007
TL;DR: In this paper, a comprehensive introduction to the fundamentals and applications of flow and heat transfer in conventional and miniature systems is provided, providing a comprehensive review of single-phase flow fundamentals and interfacial phenomena, detailed and clear discussion is provided on a range of topics, including two-phase hydrodynamics and flow regimes, mathematical modeling of gas-liquid 2-phase flows, pool and flow boiling, flow and boiling in mini and microchannels, external and internal-flow condensation with and without noncondensables, condensation in small flow passages, and two-
Abstract: Providing a comprehensive introduction to the fundamentals and applications of flow and heat transfer in conventional and miniature systems, this fully enhanced and updated edition covers all the topics essential for graduate courses on two-phase flow, boiling, and condensation. Beginning with a concise review of single-phase flow fundamentals and interfacial phenomena, detailed and clear discussion is provided on a range of topics, including two-phase hydrodynamics and flow regimes, mathematical modeling of gas-liquid two-phase flows, pool and flow boiling, flow and boiling in mini and microchannels, external and internal-flow condensation with and without noncondensables, condensation in small flow passages, and two-phase choked flow. Numerous solved examples and end-of-chapter problems that include many common design problems likely to be encountered by students, make this an essential text for graduate students. With up-to-date detail on the most recent research trends and practical applications, it is also an ideal reference for professionals and researchers in mechanical, nuclear, and chemical engineering.

270 citations

Journal ArticleDOI
TL;DR: In this article, the authors presented a method to detect the presence of viruses in the human brain using the Web of Science Record created on 2010-03-19, modified on 2017-05-10.
Abstract: Reference EPFL-ARTICLE-147393doi:10.1115/1.2955990View record in Web of Science Record created on 2010-03-19, modified on 2017-05-10

263 citations