A water-based functionalized nanofluid was made by surface functionalizing the ordinary silica nanoparticles. The functionalized nanofluid can keep long-term stability. and no sedimentation was observed. The f...
The primary objective of this study is to investigate the effect of slip mechanisms in nanofluids through scaling analysis. The role of nanoparticle slip mechanisms in both water- and ethylene glycol-based nan...
Authors: S Savithiri, Arvind Pattamatta and Sarit K Das
The thermal conductivity of boron nitride/ethylene glycol (BN/EG) nanofluids was investigated by transient hot-wire method and two abnormal phenomena was reported. One is the abnormal higher thermal conductivi...
Authors: Yanjiao Li, Jing'en Zhou, Zhifeng Luo, Simon Tung, Eric Schneider, Jiangtao Wu and Xiaojing Li
Dissipative particle dynamics (DPD), a mesoscopic simulation approach, is used to investigate the effect of volume fraction of polyethylene (PE) and poly(l-lactide) (PLLA) on the structural property of the immisc...
Authors: Yao-Chun Wang, Shin-Pon Ju, Tien Jung Huang and Hung-Hsiang Wang
Nanofluids (suspensions of nanometer-sized particles in base fluids) have recently been shown to have nucleate boiling critical heat flux (CHF) far superior to that of the pure base fluid. Over the past decade...
Polymethylmethacrylate (PMMA) microfluidic devices have been fabricated using a hot embossing technique to incorporate micro-pillar features on the bottom wall of the device which when combined with either a p...
Authors: Subhadeep Mukhopadhyay, Susanta S Roy, Raechelle A D'Sa, Ashish Mathur, Richard J Holmes and James A McLaughlin
This paper contains the results of a concise statistical review analysis of a large amount of publications regarding the anomalous heat transfer modes of nanofluids. The application of nanofluids as coolants i...
Nanoparticle suspensions (nanofluids) have been recommended as a promising option for various engineering applications, due to the observed enhancement of thermophysical properties and improvement in the effec...
Authors: Shijo Thomas and Choondal Balakrishna Panicker Sobhan
Convective heat transfer can be enhanced by changing flow geometry and/or by enhancing thermal conductivity of the fluid. This study proposes simultaneous passive heat transfer enhancement by combining the geo...
Authors: Agus Pulung Sasmito, Jundika Candra Kurnia and Arun Sadashiv Mujumdar
In this study, the lipophilic Cu nanoparticles were synthesized by surface modification method to improve their dispersion stability in hydrophobic organic media. The oil-based nanofluids were prepared with th...
The biomimetic flow at different scales has been discussed at length. The need of looking into the biological surfaces and morphologies and both geometrical and physical similarities to imitate the technologic...
The success of quenching process during industrial heat treatment mainly depends on the heat transfer characteristics of the quenching medium. In the case of quenching, the scope for redesigning the system or ...
Authors: Gopalan Ramesh and Narayan Kotekar Prabhu
The dual-phase lagging (DPL) model has been considered as one of the most promising theoretical approaches to generalize the classical Fourier law for heat conduction involving short time and space scales. Its...
Authors: Jose Ordonez-Miranda and Juan Jose Alvarado-Gil
This article reports a recent study on the application of a two-phase closed thermosyphon (TPCT) in a thermosyphon for economizer (TPEC). The TPEC had three sections of equal size; the evaporator, the adiabati...
In the recent years, great interest has been devoted to the unique properties of nanofluids. The dispersion process and the nanoparticle suspension stability have been found to be critical points in the develo...
Authors: Laura Fedele, Laura Colla, Sergio Bobbo, Simona Barison and Filippo Agresti
In this study, enhancements of thermal conductivities of ethylene glycol, water, and synthetic engine oil in the presence of copper (Cu), copper oxide (CuO), and multi-walled carbon nanotube (MWNT) are investi...
Authors: MinSheng Liu, Mark ChingCheng Lin and ChiChuan Wang
Heat dissipation from electrical appliances is a significant issue with contemporary electrical devices. One factor in the improvement of heat dissipation is the heat transfer performance of the working fluid....
Authors: Tun-Ping Teng, Ching-Min Cheng and Feng-Yi Pai
Nanofluids are having wide area of application in electronic and cooling industry. In the present work, hydrogen exfoliated graphene (HEG) dispersed deionized (DI) water, and ethylene glycol (EG) based nanoflu...
A two-phase flow experiment using air and water-based γ-Al2O3 nanofluid was conducted to observe the basic hydraulic phenomenon of nanofluids. The local two-phase flow parameters were measured with a conductivity...
In the present work, we investigated the scattering and spectrally resolved absorption properties of nanofluids consisting in aqueous and glycol suspensions of single-wall carbon nanohorns. The characteristics...
Authors: Luca Mercatelli, Elisa Sani, Giovanni Zaccanti, Fabrizio Martelli, Paola Di Ninni, Simona Barison, Cesare Pagura, Filippo Agresti and David Jafrancesco
There has been increasing interest of late in nanofluid boiling and its use in heat transfer enhancement. This article covers recent advances in the last decade by researchers in both pool boiling and convecti...
Authors: Jacqueline Barber, David Brutin and Lounes Tadrist
Very large thermal conductivity enhancement had been reported earlier in colloidal suspensions of solid nanoparticles (i.e., nanofluids) and more recently also in oil-in-water emulsions. In this study, nanoemu...
The apparent wall slip (AWS) effect, accompanying the flow of colloidal dispersions in confined geometries, can be an important factor for the applications of nanofluids in heat transfer and microfluidics. In ...
Authors: Vera Penkavova, Jaroslav Tihon and Ondrej Wein
This study investigated a simple model of transformers that have liquid magnetic cores with different concentrations of ferro-nanofluids. The simple model was built on a capillary by enamel-insulated wires and...
Authors: Tsung-Han Tsai, Ping-Hei Chen, Da-Sheng Lee and Chin-Ting Yang
Gold/1-butyl-3-methylimidazolium hexafluorophosphate (Au/[Bmim][PF6]) nanofluids containing different stabilizing agents were fabricated by a facile one-step chemical reduction method, of which the nanofluids sta...
Authors: Baogang Wang, Xiaobo Wang, Wenjing Lou and Jingcheng Hao
Ethylene glycol (EG)-based zinc oxide (ZnO) nanofluids containing no surfactant have been manufactured by one-step pulsed wire evaporation (PWE) method. Round-robin tests on thermal conductivity measurements o...
Authors: Wook-Hyun Lee, Chang-Kyu Rhee, Junemo Koo, Jaekeun Lee, Seok Pil Jang, Stephen US Choi, Ki-Woong Lee, Hwa-Young Bae, Gyoung-Ja Lee, Chang-Kyu Kim, Sung Wook Hong, Younghwan Kwon, Doohyun Kim, Soo Hyung Kim, Kyo Sik Hwang, Hyun Jin Kim…
Electrorheological (ER) fluid, which can be transformed rapidly from a fluid-like state to a solid-like state under an external electric field, is considered to be one of the most important smart fluids. Howev...
In this article, developing turbulent forced convection flow of a water-Al2O3 nanofluid in a square tube, subjected to constant and uniform wall heat flux, is numerically investigated. The mixture model is employ...
Authors: Vincenzo Bianco, Sergio Nardini and Oronzio Manca
Nanofluids are suspensions of nanoparticles and fibers which have recently attracted much attention because of their superior thermal properties. Nevertheless, it was proven that, due to modest dispersion of n...
An investigation on viscosity was conducted 2 weeks after the Al2O3-water nanofluids having dispersants were prepared at the volume concentration of 1-5%. The shear stress was observed with a non-Newtonian behavi...
Authors: Fei Duan, Dingtian Kwek and Alexandru Crivoi
A one-parameter model is presented for the thermal conductivity of nanofluids containing dispersed metallic nanoparticles. The model takes into account the decrease in thermal conductivity of metal nanoparticl...
An experimental investigation of the combustion behavior of nano-aluminum (n-Al) and nano-aluminum oxide (n-Al2O3) particles stably suspended in biofuel (ethanol) as a secondary energy carrier was conducted. The ...
Authors: Matthew Jones, Calvin H Li, Abdollah Afjeh and GP Peterson
Blade configuration of nanofluids has been proven to perform much better than dispersed configuration for some heat conduction systems. The analytical analysis and numerical calculation are made for the cylind...
Due to the numerous applications of nanofluids, investigating and understanding of thermophysical properties of nanofluids has currently become one of the core issues. Although numerous theoretical and numeric...
A novel spectral transmittance approach for measuring the extinction coefficient of magnetic fluids is proposed. The measuring principle and accuracy of the approach are analysed. Experiments are conducted to ...
The present investigation summarizes detailed experimental studies with standard lubricants of commercial quality known as Racer-4 of Hindustan Petroleum Corporation (India) dispersed with different mass conce...
Authors: Pullela K Sarma, Vadapalli Srinivas, Vedula Dharma Rao and Ayyagari Kiran Kumar
Infrared thermometry was used to obtain first-of-a-kind, time- and space-resolved data for pool boiling phenomena in water-based nanofluids with diamond and silica nanoparticles at low concentration (<0.1 vol....
Authors: Craig Gerardi, Jacopo Buongiorno, Lin-wen Hu and Thomas McKrell
An experimental study was conducted to investigate the structural stability of ethylene glycol-based titanium dioxide nanoparticle suspensions (nanofluids) prepared by two-step method. The effects of particle ...
Authors: Sanjeeva Witharana, Haisheng Chen and Yulong Ding
Stable magnetic nanofluids containing Fe3O4@Polypyrrole (PPy) nanoparticles (NPs) were prepared by using a facile and novel method, in which one-pot route was used. FeCl3·6H2O was applied as the iron source, and ...
Nanofluids, i.e., well-dispersed (metallic) nanoparticles at low- volume fractions in liquids, may enhance the mixture's thermal conductivity, knf, over the base-fluid values. Thus, they are potentially useful fo...
Suspensions of nanoparticles (i.e., particles with diameters < 100 nm) in liquids, termed nanofluids, show remarkable thermal and optical property changes from the base liquid at low particle loadings. Recent ...
Authors: Robert A Taylor, Patrick E Phelan, Todd P Otanicar, Ronald Adrian and Ravi Prasher
Silver nanoparticles were produced by electrical explosion of wires in liquids with no additive. In this study, we optimized the fabrication method and examined the effects of manufacturing process parameters....
Authors: Eun Ju Park, Seung Won Lee, In Cheol Bang and Hyung Wook Park
Convective heat transfer using different nanofluid types is investigated. The domain is differentially heated and nanofluids are treated as heterogeneous mixtures with weak solutal diffusivity and possible Sor...
Authors: Fakhreddine Segni Oueslati and Rachid Bennacer
The dispersion and stability of nanofluids obtained by dispersing Al2O3 nanoparticles in ethylene glycol have been analyzed at several concentrations up to 25% in mass fraction. The thermal conductivity and visco...
Authors: María José Pastoriza-Gallego, Luis Lugo, José Luis Legido and Manuel M Piñeiro
Experimental investigation of heat transfer during pool boiling of two nanofluids, i.e., water-Al2O3 and water-Cu has been carried out. Nanoparticles were tested at the concentration of 0.01%, 0.1%, and 1% by wei...
Authors: Janusz T Cieslinski and Tomasz Z Kaczmarczyk
The migration characteristics of carbon nanotubes from liquid phase to vapor phase in the refrigerant-based nanofluid pool boiling were investigated experimentally. Four types of carbon nanotubes with the outs...
We present an analysis of the dispersion characteristics and thermal conductivity performance of copper-based nanofluids. The copper nanoparticles were prepared using a chemical reduction methodology in the pr...
Authors: Michael Saterlie, Huseyin Sahin, Barkan Kavlicoglu, Yanming Liu and Olivia Graeve
A boundary layer analysis is presented for the mixed convection past a vertical wedge in a porous medium saturated with a nano fluid. The governing partial differential equations are transformed into a set of ...
Authors: Rama Subba Reddy Gorla, Ali Jawad Chamkha and Ahmed Mohamed Rashad
Impact and friction model of nanofluid for molecular dynamics simulation was built which consists of two Cu plates and Cu-Ar nanofluid. The Cu-Ar nanofluid model consisted of eight spherical copper nanoparticl...
Authors: Jizu Lv, Minli Bai, Wenzheng Cui and Xiaojie Li
A novel ultrasonic-aided one-step method for the fabrication of gold nanofluids is proposed in this study. Both spherical- and plate-shaped gold nanoparticles (GNPs) in the size range of 10-300 nm are synthesi...
