Gold-in-water nanofluids in microchannels: Surfactant effect

Eylül Şimşek; Matthew Redmond; Aziz Koyuncuoğlu; Tuba Okutucu-Özyurt; Haluk Külah

doi:10.1615/ihtc16.nmt.021973

Gold-in-water nanofluids in microchannels: Surfactant effect

Eylül Şimşek
, Matthew Redmond
, Aziz Koyuncuoğlu
, Tuba Okutucu-Özyurt^*
, Haluk Külah

^*Bu çalışma için yazışmadan sorumlu yazar

Middle East Technical University
University of California

Araştırma çıktısı: Dergi yayını › Konferans makalesi › Hakem

Özet

Heat transfer and pressure drop performance of gold-in-water nanofluids in microchannels are experimentally investigated. Gold nanoparticles are suspended in de-ionized (DI) water. The nanofluid stability is maintained by polyvinylpyrrolidone (PVP) for over 4 years. Nanofluids are tested in rectangular, MEMS produced copper microchannels of 70 µm x 50 µm cross-sectional area in a very low Reynolds number range of 30 < Re < 50. The performances of DI-water, PVP added DI-water, and gold-in-water nanofluid with added PVP are compared. The nanofluids always yielded a higher heat transfer coefficients than PVP-DI water solution. For occasional combinations of the particle size, volumetric concentration and flow rate, gold nanofluids yielded higher heat transfer coefficients compared to DI water as well. The effects of flow rate and particle size on the figure of merit (FM) are presented. The study is rare in dealing with pure metals (gold), and is important in emphasizing the surfactant effects on stable duration of nanofluids, and their thermal performance.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	7145-7152
Sayfa sayısı	8
Dergi	International Heat Transfer Conference
Hacim	2018-August
DOI'lar	https://doi.org/10.1615/ihtc16.nmt.021973
Yayın durumu	Yayınlandı - 2018
Harici olarak yayınlandı	Evet
Etkinlik	16th International Heat Transfer Conference, IHTC 2018 - Beijing, China Süre: 10 Ağu 2018 → 15 Ağu 2018

Bibliyografik not

Publisher Copyright:
© 2018 International Heat Transfer Conference. All rights reserved.

Finansman

This research has been financially supported by the Scientific and Technological Research Council of Turkey under grant number TÜBİTAK 108M515. The second author was a visiting researcher in Turkey on Fulbright scholarship. The SEM images of this study have been taken at METU METE NANOLAB of Dr. Emrah Ünalan.

Finansörler	Finansör numarası
Ministry of Economy, Trade and Industry
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu	TÜBİTAK 108M515

Belgeye Erişim

10.1615/ihtc16.nmt.021973

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Gold-in-water nanofluids in microchannels: Surfactant effect",

abstract = "Heat transfer and pressure drop performance of gold-in-water nanofluids in microchannels are experimentally investigated. Gold nanoparticles are suspended in de-ionized (DI) water. The nanofluid stability is maintained by polyvinylpyrrolidone (PVP) for over 4 years. Nanofluids are tested in rectangular, MEMS produced copper microchannels of 70 µm x 50 µm cross-sectional area in a very low Reynolds number range of 30 < Re < 50. The performances of DI-water, PVP added DI-water, and gold-in-water nanofluid with added PVP are compared. The nanofluids always yielded a higher heat transfer coefficients than PVP-DI water solution. For occasional combinations of the particle size, volumetric concentration and flow rate, gold nanofluids yielded higher heat transfer coefficients compared to DI water as well. The effects of flow rate and particle size on the figure of merit (FM) are presented. The study is rare in dealing with pure metals (gold), and is important in emphasizing the surfactant effects on stable duration of nanofluids, and their thermal performance.",

keywords = "Electronic equipment cooling, Gold-in-water nanofluid, Heat transfer enhancement, Microchannel heat sink, Nano/Micro scale measurement and simulation, Stability",

author = "Eyl{\"u}l {\c S}im{\c s}ek and Matthew Redmond and Aziz Koyuncuoğlu and Tuba Okutucu-{\"O}zyurt and Haluk K{\"u}lah",

note = "Publisher Copyright: {\textcopyright} 2018 International Heat Transfer Conference. All rights reserved.; 16th International Heat Transfer Conference, IHTC 2018 ; Conference date: 10-08-2018 Through 15-08-2018",

year = "2018",

doi = "10.1615/ihtc16.nmt.021973",

language = "English",

volume = "2018-August",

pages = "7145--7152",

journal = "International Heat Transfer Conference",

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T1 - Gold-in-water nanofluids in microchannels

T2 - 16th International Heat Transfer Conference, IHTC 2018

AU - Şimşek, Eylül

AU - Redmond, Matthew

AU - Koyuncuoğlu, Aziz

AU - Okutucu-Özyurt, Tuba

AU - Külah, Haluk

PY - 2018

Y1 - 2018

N2 - Heat transfer and pressure drop performance of gold-in-water nanofluids in microchannels are experimentally investigated. Gold nanoparticles are suspended in de-ionized (DI) water. The nanofluid stability is maintained by polyvinylpyrrolidone (PVP) for over 4 years. Nanofluids are tested in rectangular, MEMS produced copper microchannels of 70 µm x 50 µm cross-sectional area in a very low Reynolds number range of 30 < Re < 50. The performances of DI-water, PVP added DI-water, and gold-in-water nanofluid with added PVP are compared. The nanofluids always yielded a higher heat transfer coefficients than PVP-DI water solution. For occasional combinations of the particle size, volumetric concentration and flow rate, gold nanofluids yielded higher heat transfer coefficients compared to DI water as well. The effects of flow rate and particle size on the figure of merit (FM) are presented. The study is rare in dealing with pure metals (gold), and is important in emphasizing the surfactant effects on stable duration of nanofluids, and their thermal performance.

AB - Heat transfer and pressure drop performance of gold-in-water nanofluids in microchannels are experimentally investigated. Gold nanoparticles are suspended in de-ionized (DI) water. The nanofluid stability is maintained by polyvinylpyrrolidone (PVP) for over 4 years. Nanofluids are tested in rectangular, MEMS produced copper microchannels of 70 µm x 50 µm cross-sectional area in a very low Reynolds number range of 30 < Re < 50. The performances of DI-water, PVP added DI-water, and gold-in-water nanofluid with added PVP are compared. The nanofluids always yielded a higher heat transfer coefficients than PVP-DI water solution. For occasional combinations of the particle size, volumetric concentration and flow rate, gold nanofluids yielded higher heat transfer coefficients compared to DI water as well. The effects of flow rate and particle size on the figure of merit (FM) are presented. The study is rare in dealing with pure metals (gold), and is important in emphasizing the surfactant effects on stable duration of nanofluids, and their thermal performance.

KW - Electronic equipment cooling

KW - Gold-in-water nanofluid

KW - Heat transfer enhancement

KW - Microchannel heat sink

KW - Nano/Micro scale measurement and simulation

KW - Stability

UR - https://www.scopus.com/pages/publications/85068313539

U2 - 10.1615/ihtc16.nmt.021973

DO - 10.1615/ihtc16.nmt.021973

M3 - Conference article

AN - SCOPUS:85068313539

SN - 2377-424X

VL - 2018-August

SP - 7145

EP - 7152

JO - International Heat Transfer Conference

JF - International Heat Transfer Conference

Y2 - 10 August 2018 through 15 August 2018

ER -

Gold-in-water nanofluids in microchannels: Surfactant effect

Özet

Bibliyografik not

Finansman

Belgeye Erişim

Diğer Dosyalar ve Linkler

Parmak izi

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