Investigation of collective dynamics of solvent molecules in nanofluids by inelastic x-ray scattering

被引：8

作者：

Yano, Kazuhisa ^{[1
]}

Yoshida, Koji ^{[2
]}

Kamazawa, Kazuya ^{[3
]}

Uchiyama, Hiroshi ^{[4
]}

Tsutsui, Satoshi ^{[4
]}

Baron, Alfred Q. R. ^{[5
]}

Fukushima, Yoshiaki ^{[3
]}

Yamaguchi, Toshio ^{[2
]}

机构：

[1] Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan

[2] Fukuoka Univ, Jonan Ku, 8-19-1 Nanakuma, Fukuoka 8140180, Japan

[3] CROSS, 162-1 Shirakata, Tokai, Ibaraki 3191106, Japan

[4] Japan Synchrotron Radiat Res Inst JASRI, SPring 8, Sayo, Hyogo 6795198, Japan

[5] RIKEN, RIKEN SPring Ctr 8, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2017年 / 248卷

关键词：

Thermal conductivity; Nanofluids; Collective dynamics; Inelastic x-ray scattering; High-frequency sound velocity; GLYCOL-BASED NANOFLUIDS; THERMAL-CONDUCTIVITY; COPPER NANOPARTICLES; ENHANCEMENT; CU; PARTICLES; WATER;

D O I：

10.1016/j.molliq.2017.09.079

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Inelastic x-ray scattering is conducted to investigate the reason why the thermal conductivity of nanofluids increases beyond a theoretical value by the addition of a small amount of nanoparticles (NPs). High-frequency sound velocity is obtained by analyzing inelastic x-ray scattering data of nanofluids. Since the high-frequency sound velocity reflects thermal conductivity and structural relaxation of solvent molecules, the effect of nanoparticles on heat transport and molecular dynamics of the medium of nanofluids could be clarified. Cu nanoparticles (Cu NPs) are found to be extremely effective to largely increase the high-frequency sound velocity of medium ethylene glycol, while the effect of alumina NPs on water is limited. The increase in high-frequency sound velocity agrees well with that in thermal conductivity. It is concluded that solvent molecules are highly restrained by Cu NPs in nanofluid, leading to high thermal conductivity. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：468 / 472

页数：5

共 25 条

[1] Thermal conductivity of water and ethylene glycol nanofluids containing new modified surface SiO2-Cu nanoparticles: Experimental and modeling [J].

Amiri, Mohammad ;

Movahedirad, Salman ;

Manteghi, Faranak .

APPLIED THERMAL ENGINEERING, 2016, 108 :48-53

[2] An X-ray scattering beamline for studying dynamics [J].

Baron, AQR ;

Tanaka, Y ;

Goto, S ;

Takeshita, K ;

Matsushita, T ;

Ishikawa, T .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2000, 61 (03) :461-465

[3] High-frequency dynamics of liquid and supercritical water [J].

Bencivenga, F. ;

Cunsolo, A. ;

Krisch, M. ;

Monaco, G. ;

Ruocco, G. ;

Sette, F. .

PHYSICAL REVIEW E, 2007, 75 (05)

[4] Anomalously increased effective thermal conductivities of ethylene glycol-based nanofluids containing copper nanoparticles [J].

Eastman, JA ;

Choi, SUS ;

Li, S ;

Yu, W ;

Thompson, LJ .

APPLIED PHYSICS LETTERS, 2001, 78 (06) :718-720

[5]

Fak B., 1997, PHYS B, V1107-1108, P234

[6] HOMOGENEOUS AND HETEROGENEOUS NUCLEATIONS IN THE POLYOL PROCESS FOR THE PREPARATION OF MICRON AND SUB-MICRON SIZE METAL PARTICLES [J].

FIEVET, F ;

LAGIER, JP ;

BLIN, B ;

BEAUDOIN, B ;

FIGLARZ, M .

SOLID STATE IONICS, 1989, 32-3 :198-205

[7] Experimental Investigation of Heat Conduction Mechanisms in Nanofluids. Clue on Clustering [J].

Gao, J. W. ;

Zheng, R. T. ;

Ohtani, H. ;

Zhu, D. S. ;

Chen, G. .

NANO LETTERS, 2009, 9 (12) :4128-4132

[8] Enhanced thermal conductivity and viscosity of copper nanoparticles in ethylene glycol nanofluid [J].

Garg, J. ;

Poudel, B. ;

Chiesa, M. ;

Gordon, J. B. ;

Ma, J. J. ;

Wang, J. B. ;

Ren, Z. F. ;

Kang, Y. T. ;

Ohtani, H. ;

Nanda, J. ;

McKinley, G. H. ;

Chen, G. .

JOURNAL OF APPLIED PHYSICS, 2008, 103 (07)

[9] Transverse Acoustic Excitations in Liquid Ga [J].

Hosokawa, S. ;

Inui, M. ;

Kajihara, Y. ;

Matsuda, K. ;

Ichitsubo, T. ;

Pilgrim, W. -C. ;

Sinn, H. ;

Gonzalez, L. E. ;

Gonzalez, D. J. ;

Tsutsui, S. ;

Baron, A. Q. R. .

PHYSICAL REVIEW LETTERS, 2009, 102 (10)

[10] Heavy particle dynamics in liquid Se: Inelastic X-ray scattering [J].

Inui, Masanori ;

Hosokawa, Shinya ;

Matsuda, Kazuhiro ;

Tsutsui, Satoshi ;

Baron, Alfred Q. R. .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2007, 76 (05)

← 1 2 3 →