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Direct chemiluminescence of fluorescent gold nanoclusters with classic oxidants for hydrogen peroxide sensing EI Scopus SCIE
期刊论文 | 2019 , 12 (1) , 69-74 | Arabian Journal of Chemistry
WoS CC Cited Count: 3 SCOPUS Cited Count: 4
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Abstract :

Direct chemiluminescence (CL) of fluorescent gold nanoclusters was observed for the first time upon oxidation with classic oxidants. The CL mechanism was investigated by the studies of CL spectrum, UV-vis absorption spectra and X-ray photoelectron spectra before and after the reaction. The excited state Mn(II)*, originating from the reduction of permanganate with gold nanoclusters, was suggested as the possible luminophor for the reaction. The potential analytical application was demonstrated by using hydrogen peroxide as an example, based upon the fact that hydrogen peroxide decreased the CL signal significantly. The decreased CL intensity was proportional to the concentration of hydrogen peroxide in the range 1.0×10-6-1.0×10-4molL-1. The detection limit was 5×10-7molL-1and the relative standard deviation was 1.4% for 1.0×10-5molL-1hydrogen peroxide in 11 replicated measurements. This method was applied to the determination of hydrogen peroxide in water samples with satisfactory results. © 2015 The Authors.

Keyword :

Acidic permanganate Analytical applications Gold nanocluster Hydrogen peroxide sensing Relative standard deviations Replicated measurements UV-VIS absorption spectra X ray photoelectron spectra

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GB/T 7714 You, Xiaoying , Li, Yinhuan . Direct chemiluminescence of fluorescent gold nanoclusters with classic oxidants for hydrogen peroxide sensing [J]. | Arabian Journal of Chemistry , 2019 , 12 (1) : 69-74 .
MLA You, Xiaoying 等. "Direct chemiluminescence of fluorescent gold nanoclusters with classic oxidants for hydrogen peroxide sensing" . | Arabian Journal of Chemistry 12 . 1 (2019) : 69-74 .
APA You, Xiaoying , Li, Yinhuan . Direct chemiluminescence of fluorescent gold nanoclusters with classic oxidants for hydrogen peroxide sensing . | Arabian Journal of Chemistry , 2019 , 12 (1) , 69-74 .
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Lattice strain causes non-radiative losses in halide perovskites SCIE
期刊论文 | 2019 , 12 (2) , 596-606 | ENERGY & ENVIRONMENTAL SCIENCE
WoS CC Cited Count: 6
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Abstract :

Halide perovskites are promising semiconductors for inexpensive, high-performance optoelectronics. Despite a remarkable defect tolerance compared to conventional semiconductors, perovskite thin films still show substantial microscale heterogeneity in key properties such as luminescence efficiency and device performance. However, the origin of the variations remains a topic of debate, and a precise understanding is critical to the rational design of defect management strategies. Through a multi-scale investigation - combining correlative synchrotron scanning X-ray diffraction and time-resolved photoluminescence measurements on the same scan area - we reveal that lattice strain is directly associated with enhanced defect concentrations and non-radiative recombination. The strain patterns have a complex heterogeneity across multiple length scales. We propose that strain arises during the film growth and crystallization and provides a driving force for defect formation. Our work sheds new light on the presence and influence of structural defects in halide perovskites, revealing new pathways to manage defects and eliminate losses.

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GB/T 7714 Jones, Timothy W. , Osherov, Anna , Alsari, Mejd et al. Lattice strain causes non-radiative losses in halide perovskites [J]. | ENERGY & ENVIRONMENTAL SCIENCE , 2019 , 12 (2) : 596-606 .
MLA Jones, Timothy W. et al. "Lattice strain causes non-radiative losses in halide perovskites" . | ENERGY & ENVIRONMENTAL SCIENCE 12 . 2 (2019) : 596-606 .
APA Jones, Timothy W. , Osherov, Anna , Alsari, Mejd , Sponseller, Melany , Duck, Benjamin C. , Jung, Young-Kwang et al. Lattice strain causes non-radiative losses in halide perovskites . | ENERGY & ENVIRONMENTAL SCIENCE , 2019 , 12 (2) , 596-606 .
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The intraocular pressure could not be used to determine the intracranial pressure in patients with hydrocephalus. PubMed Scopus SCIE
期刊论文 | 2019 , 129 (1) , 42-48 | The International journal of neuroscience
WoS CC Cited Count: 26
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Abstract :

An accurate intracranial pressure (ICP) measurement is vital for patients with hydrocephalus. ICP is generally measured by lumbar puncture opening pressure, which is invasive and has potential adverse side effects. Intraocular pressure (IOP) was investigated to measure ICP indirectly; however, its accuracy was controversial. We conducted this retrospective study to investigate whether IOP can be used as a surrogate for ICP in hydrocephalus patients.We performed a retrospective study enrolled 50 cases, including 32 patients with normal pressure hydrocephalus (NPH) and 18 patients with high pressure hydrocephalus (HPH). The independent factors of ICP, the correlation between ICP and other factors, and diagnostic value of IOP and papilledema to predict ICP were analysed, respectively.Patients with HPH were more likely suffered from visual deterioration (33.33% vs. 9.38%, p = .045) and papilledema (55.56% vs. 3.13%, p = .001). Multivariate analysis revealed that papilledema was a significant factor (OR =40.765, 95%CI 3.331-498.846, p = .004). Pearson's correlation analysis indicated that ICP did not correlate with any other factors.IOP was not an independent factor of ICP in patients with hydrocephalus, and could not be used to determine IOP. Papilledema might be a significant factor of ICP in hydrocephalus sufferers. Compared with NPH patients, patients with HPH were more prone to develop papilledema.

Keyword :

intracranial pressure intraocular pressure age Hydrocephalus papilledema

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GB/T 7714 Wang Wei , Wang Maode , Li Zhijin et al. The intraocular pressure could not be used to determine the intracranial pressure in patients with hydrocephalus. [J]. | The International journal of neuroscience , 2019 , 129 (1) : 42-48 .
MLA Wang Wei et al. "The intraocular pressure could not be used to determine the intracranial pressure in patients with hydrocephalus." . | The International journal of neuroscience 129 . 1 (2019) : 42-48 .
APA Wang Wei , Wang Maode , Li Zhijin , Wang Tuo , Da Rong . The intraocular pressure could not be used to determine the intracranial pressure in patients with hydrocephalus. . | The International journal of neuroscience , 2019 , 129 (1) , 42-48 .
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Low-temperature-gradient crystallization for multi-inch high-quality perovskite single crystals for record performance photodetectors EI Scopus SCIE
期刊论文 | 2019 , 22 , 67-75 | Materials Today
WoS CC Cited Count: 6 SCOPUS Cited Count: 6
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Abstract :

With their excellent optoelectronic properties, the practical application of single-crystalline organolead halide perovskite materials is now limited by the lack of a method to prepare high-quality perovskite single crystals in large dimension. Herein, we report our development of a low-temperature-gradient crystallization (LTGC) method for high-quality CH3NH3PbBr3(MAPbBr3) perovskite single crystals with lateral dimension as large as two inches. The theoretical analysis suggests that a small temperature gradient should be used to restrain the growth condition, particularly the solution concentration, within the optimal single-crystal-growth (OSCG) zone. The solubility curve as a function of temperature reveals a sharp turning point at ∼60 °C, across which the first-order solubility derivative (dC/dT) shows very different behaviors: below this temperature, the dC/dT changes dramatically as the temperature increases, while above this temperature, the dC/dT enters a plateau where further temperature change has little effect on the derivative, meaning that one can attain both a substantial crystal growth rate and crystallization yield below this temperature. Utilizing this discovery, a MAPbBr3single crystal as large as 47 × 41 × 14 mm is obtained with high quality via the LTGC method. The single crystal exhibits the best optoelectronic quality among all MAPbBr3materials reported in the literature, including the best trap state density, mobility, carrier lifetime, and diffusion length. These superior optoelectronic properties are further transferred into a high-performance planar photodetector. The device exhibits high operational stability, high external quantum efficiency (13,453%), excellent detectivity as high as 8 × 1013Jones, and a fast response speed as quick as 15.8 μs. To our knowledge, both the detectivity and the response speed are the best among all MAPbBr3devices reported to date. The unique synthesis method and excellent crystalline quality of the perovskite single crystals make them promising candidates for the next generation of optoelectronic devices. © 2018 Elsevier Ltd

Keyword :

Crystalline quality External quantum efficiency Low temperature gradients Operational stability Optoelectronic properties Solution concentration Temperature changes Temperature increase

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GB/T 7714 Liu, Yucheng , Zhang, Yunxia , Yang, Zhou et al. Low-temperature-gradient crystallization for multi-inch high-quality perovskite single crystals for record performance photodetectors [J]. | Materials Today , 2019 , 22 : 67-75 .
MLA Liu, Yucheng et al. "Low-temperature-gradient crystallization for multi-inch high-quality perovskite single crystals for record performance photodetectors" . | Materials Today 22 (2019) : 67-75 .
APA Liu, Yucheng , Zhang, Yunxia , Yang, Zhou , Feng, Jiangshan , Xu, Zhuo , Li, Qingxian et al. Low-temperature-gradient crystallization for multi-inch high-quality perovskite single crystals for record performance photodetectors . | Materials Today , 2019 , 22 , 67-75 .
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Exogenous melatonin as a treatment for secondary sleep disorders: A systematic review and meta-analysis. PubMed Scopus SCIE
期刊论文 | 2019 , 52 , 22-28 | Frontiers in neuroendocrinology
WoS CC Cited Count: 6 SCOPUS Cited Count: 7
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Abstract :

Melatonin is a physiological indoleamine involved in circadian rhythm regulation and it is currently used for secondary sleep disorders supported by empirical evidence. A small amount of evidence and some controversial results have been obtained in some randomized controlled trials (RCT). The objective of this meta-analysis is to determine the efficacy of exogenous melatonin versus placebo in managing secondary sleep disorders. Literature retrieval of eligible RCT was performed in 5 databases (PubMed, Embase, Cochrane Library, ClinicalTrials.gov, and Web of Science). In total, 7 studies of 205 patients were included. Pooled data demonstrate that exogenous melatonin lowers sleep onset latency and increases total sleep time, whereas it has little if any effect on sleep efficiency. Although, the efficacy of melatonin still requires further confirmation, this meta-analysis clearly supports the use of melatonin as a management for patients with secondary sleep disorders.

Keyword :

Meta-analysis Sleep onset latency Secondary sleep disorders Melatonin Sleep efficiency Total sleep time

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GB/T 7714 Li Tian , Jiang Shuai , Han Mengzhen et al. Exogenous melatonin as a treatment for secondary sleep disorders: A systematic review and meta-analysis. [J]. | Frontiers in neuroendocrinology , 2019 , 52 : 22-28 .
MLA Li Tian et al. "Exogenous melatonin as a treatment for secondary sleep disorders: A systematic review and meta-analysis." . | Frontiers in neuroendocrinology 52 (2019) : 22-28 .
APA Li Tian , Jiang Shuai , Han Mengzhen , Yang Zhi , Lv Jianjun , Deng Chao et al. Exogenous melatonin as a treatment for secondary sleep disorders: A systematic review and meta-analysis. . | Frontiers in neuroendocrinology , 2019 , 52 , 22-28 .
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How To Obtain Six Different Superwettabilities on a Same Microstructured Pattern: Relationship between Various Superwettabilities in Different Solid/Liquid/Gas Systems. PubMed SCIE
期刊论文 | 2019 , 35 (4) , 921-927 | Langmuir : the ACS journal of surfaces and colloids
WoS CC Cited Count: 3
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Abstract :

A range of different superwettabilities were obtained on femtosecond laser-structured Al surfaces. The formation mechanism of each superwetting state is discussed in this paper. It is revealed that the underwater oil droplet and bubble wettabilities of a solid surface have a close relationship with its water wettability. The laser-induced hierarchical microstructures showed superhydrophilicity in air but showed superoleophobicity/superaerophobicity after immersion in water. When such microstructures were further modified with a low-surface-energy monolayer, the wettability of the resultant surface would turn to superhydrophobicity with ultralow water adhesion in air and superoleophilicity/superaerophilicity in water. The understanding of the relationship among the above-mentioned six different superwettabilities is highly important in the design of various superwetting microstructures, transforming the structures from one superwetting state to another state and better using the artificial superwetting materials.

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GB/T 7714 Yong Jiale , Singh Subhash C , Zhan Zhibing et al. How To Obtain Six Different Superwettabilities on a Same Microstructured Pattern: Relationship between Various Superwettabilities in Different Solid/Liquid/Gas Systems. [J]. | Langmuir : the ACS journal of surfaces and colloids , 2019 , 35 (4) : 921-927 .
MLA Yong Jiale et al. "How To Obtain Six Different Superwettabilities on a Same Microstructured Pattern: Relationship between Various Superwettabilities in Different Solid/Liquid/Gas Systems." . | Langmuir : the ACS journal of surfaces and colloids 35 . 4 (2019) : 921-927 .
APA Yong Jiale , Singh Subhash C , Zhan Zhibing , Chen Feng , Guo Chunlei . How To Obtain Six Different Superwettabilities on a Same Microstructured Pattern: Relationship between Various Superwettabilities in Different Solid/Liquid/Gas Systems. . | Langmuir : the ACS journal of surfaces and colloids , 2019 , 35 (4) , 921-927 .
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Co-pyrolysis of lignocellulosic biomass with low-quality coal: Optimal design and synergistic effect from gaseous products distribution Scopus SCIE
期刊论文 | 2019 , 236 , 43-54 | Fuel
WoS CC Cited Count: 7 SCOPUS Cited Count: 9
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Abstract :

© 2018 Elsevier Ltd Co-pyrolysis of lignocellulosic biomass and low-quality coal can alternate fossil fuel partially and utilize biomass on a commercial scale. Gaseous products from co-pyrolysis process can be widely applied in industries due to the advantage in transportation and compression. Thus, investigation of synergistic effect and optimal design about gas products is essential for efficiently and comprehensively design of the process. In this research, three model compounds of lignocellulosic biomass (cellulose, hemicellulose, lignin) and wheat straw were co-pyrolyzed with a kind of low-quality coal via a drop tube furnace. Based on the component insight of biomass and response surface methodology, synergetic effects from gas distribution were investigated. The influence of reaction condition (biomass ratio and pyrolysis temperature) on the yield and high heat value (HHV) of gaseous products were explored. Optimal result for the objective of the highest effective gas yield during co-pyrolysis were obtained. Results revealed that both positive and negative synergic effects on yields and composition of pyrolysis gas were presented. When pyrolysis temperature was 600 °C, both wheat straw and three model compounds promoted the formation of H2 and CO. Negative effects on CO2 were observed when co-pyrolysis of cellulose/wheat straw with coal at the temperature of 600 °C to 800 °C. Whether positive or negative synergy existed depended on the mixing ratio, temperature and combined action of lignin, hemicellulose, and cellulose. For coal and hemicellulose mixtures, the mixing ratio of 0.03 and temperature of 936 °C can get the highest yield of H2 (20.56 mmol/g). Moreover, the maximum yield of CO and CO2 was obtained at cellulose mixing ratio of 0.99 and 0.98 at 787 °C and 626 °C, respectively. Based on the view of biomass composition, the results can be used to optimize the gaseous products distribution during co-pyrolysis of coal and biomass.

Keyword :

Co-pyrolysis Gaseous products Lignocellulosic biomass Low-quality coal Optimal design Synergistic effect

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GB/T 7714 Wu, Zhiqiang , Li, Yaowu , Xu, Donghai et al. Co-pyrolysis of lignocellulosic biomass with low-quality coal: Optimal design and synergistic effect from gaseous products distribution [J]. | Fuel , 2019 , 236 : 43-54 .
MLA Wu, Zhiqiang et al. "Co-pyrolysis of lignocellulosic biomass with low-quality coal: Optimal design and synergistic effect from gaseous products distribution" . | Fuel 236 (2019) : 43-54 .
APA Wu, Zhiqiang , Li, Yaowu , Xu, Donghai , Meng, Haiyu . Co-pyrolysis of lignocellulosic biomass with low-quality coal: Optimal design and synergistic effect from gaseous products distribution . | Fuel , 2019 , 236 , 43-54 .
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Spray morphology transformation of propane, n-hexane and iso-octane under flash-boiling conditions EI Scopus SCIE
期刊论文 | 2019 , 236 , 677-685 | Fuel
WoS CC Cited Count: 9 SCOPUS Cited Count: 9
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Abstract :

Spray collapse has been widely observed under both flash-boiling and non-flash-boiling conditions when multi-hole gasoline direct injection (GDI) injectors with compact nozzle configurations were used. The main objective of this study is to further understand the collapse mechanisms by using liquids with appreciably different properties (propane, n-hexane and iso-octane). The tests were carried out in a constant volume vessel with ambient pressures ranging from 0.6 bar to 11.0 bar and fuel temperatures from 30 °C to 110 °C. Flashing propane sprays presented a non-collapse feature under elevated-ambient-pressures but flash-boiling conditions. By close-up examination of flashing propane sprays over a wide range of liquid temperatures and ambient pressures, it was found that there should be an ambient pressure threshold between 1.0 and 3.0 bar between the collapsed and the non-collapse sprays for propane. The spray collapse occurred as the ambient pressure is below the threshold. The non-collapse feature for flashing propane sprays under the ambient pressures beyond the threshold was attributed to the prohibition of nucleation and bubble growth under elevated ambient pressures. © 2018 Elsevier Ltd

Keyword :

Collapse Collapse mechanism Constant-volume vessel Flash boiling Gasoline direct injection Liquid temperature Morphology transformations Nozzle configuration

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GB/T 7714 Li, Yanfei , Guo, Hengjie , Zhou, Zhifu et al. Spray morphology transformation of propane, n-hexane and iso-octane under flash-boiling conditions [J]. | Fuel , 2019 , 236 : 677-685 .
MLA Li, Yanfei et al. "Spray morphology transformation of propane, n-hexane and iso-octane under flash-boiling conditions" . | Fuel 236 (2019) : 677-685 .
APA Li, Yanfei , Guo, Hengjie , Zhou, Zhifu , Zhang, Zhou , Ma, Xiao , Chen, Longfei . Spray morphology transformation of propane, n-hexane and iso-octane under flash-boiling conditions . | Fuel , 2019 , 236 , 677-685 .
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Transient cooling and operational performance of the cryogenic part in reverse Brayton air refrigerator EI SCIE
期刊论文 | 2019 , 167 , 921-938 | Energy
WoS CC Cited Count: 6
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Abstract :

Accurate calculation of the transient cooling performance is crucial for the operation and control of a reverse Brayton refrigerator. Components of the refrigerator have complex working characteristics individually and interact each other mutually. To solve the problem easily, the turboexpander matching characteristics were usually ignored and relations among components were simplified. In this study, a cryogenic reverse Brayton air refrigerator equipped with gas bearing turboexpander and plate-fin heat regenerator was presented. The ultimate refrigerating temperature was proposed through analysis. The transient cooling characteristics of the cryogenic part in refrigerator were resolved into the turboexpander matching performance and the regenerator transient cooling characteristics. The regenerator was simulated through numerical heat transfer and computational fluid dynamics by considering the axial conduction and cold loss. The matching model was improved by adopting a significant method of constant rotating speed. Using the dual non-steady time steps, a transient cooling model of the cryogenic part was explored via C++ code, and verified by experiment. Through the model, the refrigerator cooling performances were evaluated under different operation modes, and the energy utilization efficiency was determined. It can be used to evaluate the operation strategy of refrigerators and help to promote energy efficiency. © 2018 Elsevier Ltd

Keyword :

Brayton Dynamic matching Energy utilization efficiency Numerical heat transfer Operation and control Operational performance Transient cooling Ultimate refrigerating temperatures

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GB/T 7714 Yang, Shanju , Fu, Bao , Hou, Yu et al. Transient cooling and operational performance of the cryogenic part in reverse Brayton air refrigerator [J]. | Energy , 2019 , 167 : 921-938 .
MLA Yang, Shanju et al. "Transient cooling and operational performance of the cryogenic part in reverse Brayton air refrigerator" . | Energy 167 (2019) : 921-938 .
APA Yang, Shanju , Fu, Bao , Hou, Yu , Chen, Shuangtao , Li, Zhiguo , Wang, Shaojin . Transient cooling and operational performance of the cryogenic part in reverse Brayton air refrigerator . | Energy , 2019 , 167 , 921-938 .
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Recent advances in modeling and simulation of nanofluid flows-Part I: Fundamentals and theory SCIE
期刊论文 | 2019 , 790 , 1-48 | PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
WoS CC Cited Count: 16
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Abstract :

It has been more than two decades since the discovery of nanofluids-mixtures of common liquids and solid nanoparticles less than 100 nm in size. As a type of colloidal suspension, nanofluids are typically employed as heat transfer fluids due to their favorable thermal and fluid properties. There have been numerous numerical studies of nanofluids in recent years (more than 1000 in both 2016 and 2017, based on Scopus statistics). Due to the small size and large numbers of nanoparticles that interact with the surrounding fluid in nanofluid flows, it has been a major challenge to capture both the macro-scale and the nano-scale effects of these systems without incurring extraordinarily high computational costs. To help understand the state of the art in modeling nanofluids and to discuss the challenges that remain in this field, the present article reviews the latest developments in modeling of nanofluid flows and heat transfer with an emphasis on 3D simulations. In part I, a brief overview of nanofluids (fabrication, applications, and their achievable thermo-physical properties) will be presented first. Next, various forces that exist in particulate flows such as drag, lift (Magnus and Saffman), Brownian, thermophoretic, van der Waals, and electrostatic double layer forces and their significance in nanofluid flows are discussed. Afterwards, the main models used to calculate the thermophysical properties of nanofluids are reviewed. This will be followed with the description of the main physical models presented for nanofluid flows and heat transfer, from single-phase to Eulerian and Lagrangian two-phase models. In part II, various computational fluid dynamics (CFD) techniques will be presented. Next, the latest studies on 3D simulation of nanofluid flow in various regimes and configurations are reviewed. The present review is expected to be helpful for researchers working on numerical simulation of nanofluids and also for scholars who work on experimental aspects of nanofluids to understand the underlying physical phenomena occurring during their experiments. (C) 2018 Elsevier B.V. All rights reserved.

Keyword :

Thermophysical properties Physical models Dynamics of nanoparticles Nanofluids

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GB/T 7714 Mahian, Omid , Kolsi, Lioua , Amani, Mohammad et al. Recent advances in modeling and simulation of nanofluid flows-Part I: Fundamentals and theory [J]. | PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS , 2019 , 790 : 1-48 .
MLA Mahian, Omid et al. "Recent advances in modeling and simulation of nanofluid flows-Part I: Fundamentals and theory" . | PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS 790 (2019) : 1-48 .
APA Mahian, Omid , Kolsi, Lioua , Amani, Mohammad , Estelle, Patrice , Ahmadi, Goodarz , Kleinstreuer, Clement et al. Recent advances in modeling and simulation of nanofluid flows-Part I: Fundamentals and theory . | PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS , 2019 , 790 , 1-48 .
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