Increasing the stability of nanofluids with cavitating flows in micro orifices

Name: Increasing the stability of nanofluids with cavitating flows in micro orifices
Author: Karimzadehkhouei, M., Ghorbani, M., Sezen, M., Sendur, K., Mengüç, Mustafa Pınar, Leblebici, Y., Kosar, A.

İsim	Increasing the stability of nanofluids with cavitating flows in micro orifices
Yazar	Karimzadehkhouei, M., Ghorbani, M., Sezen, M., Sendur, K., Mengüç, Mustafa Pınar, Leblebici, Y., Kosar, A.
Basım Tarihi:	2016
Basım Yeri	- AIP
Konu	Nanoparticles, Cavitation, Bubble dynamics, Microscale flows, High pressure
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	2-s2.0-84986274535
Kayıt Numarası	e544b33b-69a2-4f98-94ef-3701b14fc115
Lokasyon	Mechanical Engineering
Tarih	2016
Notlar	TÜBİTAK ; SUNUM ; Sabanci University Faculty of Engineering and Natural Science.
Örnek Metin	One of the most critical challenges for nanofluids in practical applications is related to their stability and reusability since a gradual agglomeration of nanoparticles in nanofluids occurs with time and is accelerated by heating. In this study, we propose a technique to maintain the performance and stability of nanofluids with the use of cavitating flows through micro orifices to prevent agglomeration and sedimentation of nanoparticles, which will increase the durability of the nanofluids. γ-Al2O3 (gamma-alumina) nanoparticles with a mean diameter of 20 nm suspended in water were utilized. In the current approach, a flow restrictive element induces sudden pressure, which leads to cavitation bubbles downstream from the orifice. The emerging bubbles interact with the agglomerated structure of nanoparticles and decrease its size through hitting or shock waves generated by their collapse, thereby increasing the stability and reusability of nanofluids. The method does not involve any use of expensive surfactants or surface modifiers, which might alter the thermophysical properties of nanofluids, may adversely influence their performance and biocompatibility, and may limit their effectiveness.
DOI	10.1063/1.4962330
Cilt	109

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Increasing the stability of nanofluids with cavitating flows in micro orifices

Yazar Karimzadehkhouei, M., Ghorbani, M., Sezen, M., Sendur, K., Mengüç, Mustafa Pınar, Leblebici, Y., Kosar, A.

Basım Tarihi 2016

Basım Yeri - AIP

Konu Nanoparticles, Cavitation, Bubble dynamics, Microscale flows, High pressure

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 2-s2.0-84986274535

Kayıt Numarası e544b33b-69a2-4f98-94ef-3701b14fc115

Lokasyon Mechanical Engineering

Tarih 2016

Notlar TÜBİTAK ; SUNUM ; Sabanci University Faculty of Engineering and Natural Science.

Örnek Metin One of the most critical challenges for nanofluids in practical applications is related to their stability and reusability since a gradual agglomeration of nanoparticles in nanofluids occurs with time and is accelerated by heating. In this study, we propose a technique to maintain the performance and stability of nanofluids with the use of cavitating flows through micro orifices to prevent agglomeration and sedimentation of nanoparticles, which will increase the durability of the nanofluids. γ-Al2O3 (gamma-alumina) nanoparticles with a mean diameter of 20 nm suspended in water were utilized. In the current approach, a flow restrictive element induces sudden pressure, which leads to cavitation bubbles downstream from the orifice. The emerging bubbles interact with the agglomerated structure of nanoparticles and decrease its size through hitting or shock waves generated by their collapse, thereby increasing the stability and reusability of nanofluids. The method does not involve any use of expensive surfactants or surface modifiers, which might alter the thermophysical properties of nanofluids, may adversely influence their performance and biocompatibility, and may limit their effectiveness.

DOI 10.1063/1.4962330

Cilt 109