A review of flow boiling heat transfer of nanofluids

Fang, Xiande; Wang, Run; Chen, Weiwei; Zhang, Helei; Ma, Chunxiang

doi:10.1016/j.applthermaleng.2015.08.100

Cited by 72 publications

(26 citation statements)

References 45 publications

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“…The passive measures previously utilized to enhance the CHF of nucleate boiling can be generally categorized into two types: First is through changes in the thermophysical properties of the boiling fluid, such as the addition of different surfactants or the employment of different nanofluids; [4][5][6][7] and second is through modifications to the heated surface. In this latter case, a variety of methods have been proposed, such as the fabrication of nano-or micro-scale functional structures, [8][9][10][11][12] deposited nanoparticle layers, [13][14][15][16][17][18] atomic layer deposition, [19][20] micro/nano porous coatings [21][22][23][24][25] and hybrid wettability treatments.…”

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confidence: 99%

Pool boiling with high heat flux enabled by a porous artery structure

Bai

Zhang

Lin

et al. 2016

Applied Physics Letters

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A porous artery structure utilizing the concept of “phase separation and modulation” is proposed to enhance the critical heat flux of pool boiling. A series of experiments were conducted on a range of test articles in which multiple rectangular arteries were machined directly into the top surface of a 10.0 mm diameter copper rod. The arteries were then covered by a 2.0 mm thickness microporous copper plate through silver brazing. The pool wall was fabricated from transparent Pyrex glass to allow a visualization study, and water was used as the working fluid. Experimental results confirmed that the porous artery structure provided individual flow paths for the liquid supply and vapor venting, and avoided the detrimental effects of the liquid/vapor counter flow. As a result, a maximum heat flux of 610 W/cm2 over a heating area of 0.78 cm2 was achieved with no indication of dryout, prior to reaching the heater design temperature limit. Following the experimental tests, the mechanisms responsible for the boiling critical heat flux and performance enhancement of the porous artery structure were analyzed.

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confidence: 99%

Pool boiling with high heat flux enabled by a porous artery structure

Bai

Zhang

Lin

et al. 2016

Applied Physics Letters

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“…Figure 5b shows the extrapolation of surface temperature using Eqs. (1)(2)(3)(4)(5) for heat flux 400 kW/m 2 . In addition, a comparison was made between extrapolated surface temperature and data measured by a thermocouple mounted on the surface.…”

Section: Data Reduction and Uncertaintymentioning

confidence: 99%

“…bubble transport, nucleation, bubble frequency and bubble sliding. Moreover, during boiling phenomenon, a bubble can be formed, grow and collapse inside the bulk of fluid, which transfers a large quantity of heat from surface towards the bulk of fluid [1][2][3].…”

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confidence: 99%

Thermal behavior of aqueous iron oxide nano-fluid as a coolant on a flat disc heater under the pool boiling condition

et al. 2016

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“…Nanoakışkanların kaynamalı akış ısı transfer katsayısı ile ilgili yapılan deneysel çalışmaların özeti (Fang et al, 2015) Boudouh et al (2010) bakır bir plaka üzerine yerleştirilmiş hidrolik çapı 800 µm olan dikdörtgen kesitli 50 adet parallel kanal kullanarak Cu-su nanoakışkanının akış kaynama ısı transferi ve basınç düşüşü karakteristiklerini incelemiştir. Ortalama çapı 35 nm olan bakır nanopartiküller % 0.00056, 0.0011 ve 0.0056 olacak şekilde çok düşük hacimsel oranlarda temel akışkan su içerisine dağıtılmıştır.…”

Section: Mikrokanallarda Nanoakışkanların Kaynamalı Akış Karakteristiunclassified

Flow Boiling Characteristics of Nanofluids in Microchannels

Manay¹

2017

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ÖZET: Mikrocihazlarda giderek artan ısı akısı değerleri nedeniyle geleneksel ısı transfer arttırım yöntemleri mikrosistemlerin soğutulmasında yetersiz kalmaktadır. Kaynama ile ısı transferi yüksek ısı transfer katsayılarının elde edilmesi yanında yüzey sıcaklığının neredeyse sabit olması nedeniyle yüksek ısı atımını gerektiren mikrosistem uygulamaları için önemli bir potansiyele sahiptir. Diğer yandan geleneksel akışkanlar yerine nanoakışkanların kullanımı yüksek ısıl performans için önemli bir alternatif olarak düşünülmektedir. Nanoakışkanların tek fazlı ısı transferiyle ilgili birçok çalışma olmasına rağmen mikrokanallarda kaynamalı akış durumunda nanoakışkan kullanımıyla ilgili sınırlı sayıda çalışma mevcuttur. Literatürde nanoakışkanların kaynamalı akışta kullanımının bazı çalışmalara göre uygun olup olmadığı yönünde belirsizlikler vardır. Bu nedenle nanoakışkanların kaynamalı akış şartlarında kullanılabilirliği ile ilgili daha kapsamlı çalışmalara ihtiyaç vardır. Bu çalışmada, farklı nanoakışkanlar ile yapılan deneysel çalışmalar derlenmiş ve nanoakışkanların mikrokanallarda kaynamalı akışta kullanımının avantaj ve dezavantajları belirlenmeye çalışılmıştır.Anahtar kelimeler: Kaynamalı akış, kritik ısı akısı, mikrokanal, nanoakışkan ABSTRACT: Due to the ever increasing heat flux values, traditional heat transfer enhancement methods fail to satisfy on cooling of micro systems. Flow boiling heat transfer has a great potential for the applications requiring high heat removal rates because high heat transfer coefficients are achieved in addition to surface temperature to be nearly constant. On the other hand, use of nanofluids instead of traditional fluids is thought to be an important alternative for high thermal performance. Although there are numerous study on the single phase heat transfer of nanofluids, a few number of study concerning with the flow boiling heat transfer of nanofluids in microchannels exists. In the literature, there are some conflicts on whether the use of nanofluids in flow boiling is appropriate or not. Thus, more detailed studies on the usability of nanofluids in boiling flow conditions are required. In this study, experimental studies conducted by with nanofluids were reviewed, and the advantages and disadvantages of the using nanofluids in boiling flows in microchannels were determined.

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A review of flow boiling heat transfer of nanofluids

Cited by 72 publications

References 45 publications

Pool boiling with high heat flux enabled by a porous artery structure

Pool boiling with high heat flux enabled by a porous artery structure

Thermal behavior of aqueous iron oxide nano-fluid as a coolant on a flat disc heater under the pool boiling condition

Flow Boiling Characteristics of Nanofluids in Microchannels

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