Entropy generation analysis of laminar flows of water-based nanofluids in horizontal minitubes under constant heat flux conditions

Name: Entropy generation analysis of laminar flows of water-based nanofluids in horizontal minitubes under constant heat flux conditions
Author: Karimzadehkhouei, M., Shojaeian, M., Sadaghiani, A. K., Şendur, K., Mengüç, Mustafa Pınar, Koşar, A.

İsim	Entropy generation analysis of laminar flows of water-based nanofluids in horizontal minitubes under constant heat flux conditions
Yazar	Karimzadehkhouei, M., Shojaeian, M., Sadaghiani, A. K., Şendur, K., Mengüç, Mustafa Pınar, Koşar, A.
Basım Tarihi:	2018-04
Basım Yeri	- MDPI AG
Konu	Entropy generation, Heat transfer coefficient, TiO2 and Al2O3 nanoparticles, Carbon nanotubes, Nanofluid, Minitube
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1099-4300
Kayıt Numarası	6552fcff-18f7-4978-b1de-d06d38c25ccb
Lokasyon	Mechanical Engineering
Tarih	2018-04
Notlar	Turkish Academy of Sciences (GEBIP Programme) ; SUNUM (Sabanci University Nanotechnology Research and Applications Center) ; Sabanci University Faculty of Engineering and Natural Science (FENS)
Örnek Metin	During the last decade, second law analysis via entropy generation has become important in terms of entropy generation minimization (EGM), thermal engineering system design, irreversibility, and energy saving. In this study, heat transfer and entropy generation characteristics of flows of multi-walled carbon nanotube-based nanofluids were investigated in horizontal minitubes with outer and inner diameters of ~1067 and ~889 µm, respectively. Carbon nanotubes (CNTs) with outer diameter of 10–20 nm and length of 1–2 µm were used for nanofluid preparation, and water was considered as the base fluid. The entropy generation based on the experimental data, a significant parameter in thermal design system, was examined for CNTs/water nanofluids. The change in the entropy generation was only seen at low mass fractions (0.25 wt.% and 0.5 wt.%). Moreover, to have more insight on the entropy generation of nanofluids based on the experimental data, a further analysis was performed on Al2O3 and TiO2 nanoparticles/water nanofluids from the experimental database of the previous study of the authors. The corresponding results disclosed a remarkable increase in the entropy generation rate when Al2O3 and TiO2 nanoparticles were added to the base fluid.
DOI	10.3390/e20040242
Cilt	20

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Entropy generation analysis of laminar flows of water-based nanofluids in horizontal minitubes under constant heat flux conditions

Yazar Karimzadehkhouei, M., Shojaeian, M., Sadaghiani, A. K., Şendur, K., Mengüç, Mustafa Pınar, Koşar, A.

Basım Tarihi 2018-04

Basım Yeri - MDPI AG

Konu Entropy generation, Heat transfer coefficient, TiO2 and Al2O3 nanoparticles, Carbon nanotubes, Nanofluid, Minitube

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1099-4300

Kayıt Numarası 6552fcff-18f7-4978-b1de-d06d38c25ccb

Lokasyon Mechanical Engineering

Tarih 2018-04

Notlar Turkish Academy of Sciences (GEBIP Programme) ; SUNUM (Sabanci University Nanotechnology Research and Applications Center) ; Sabanci University Faculty of Engineering and Natural Science (FENS)

Örnek Metin During the last decade, second law analysis via entropy generation has become important in terms of entropy generation minimization (EGM), thermal engineering system design, irreversibility, and energy saving. In this study, heat transfer and entropy generation characteristics of flows of multi-walled carbon nanotube-based nanofluids were investigated in horizontal minitubes with outer and inner diameters of ~1067 and ~889 µm, respectively. Carbon nanotubes (CNTs) with outer diameter of 10–20 nm and length of 1–2 µm were used for nanofluid preparation, and water was considered as the base fluid. The entropy generation based on the experimental data, a significant parameter in thermal design system, was examined for CNTs/water nanofluids. The change in the entropy generation was only seen at low mass fractions (0.25 wt.% and 0.5 wt.%). Moreover, to have more insight on the entropy generation of nanofluids based on the experimental data, a further analysis was performed on Al2O3 and TiO2 nanoparticles/water nanofluids from the experimental database of the previous study of the authors. The corresponding results disclosed a remarkable increase in the entropy generation rate when Al2O3 and TiO2 nanoparticles were added to the base fluid.

DOI 10.3390/e20040242

Cilt 20