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Journal articles on the topic 'Nanofluidic chips'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Peng, Ran, and Dongqing Li. "Fabrication of polydimethylsiloxane (PDMS) nanofluidic chips with controllable channel size and spacing." Lab on a Chip 16, no. 19 (2016): 3767–76. http://dx.doi.org/10.1039/c6lc00867d.

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2

Shimizu, Hisashi, Shigenori Takeda, Kazuma Mawatari, and Takehiko Kitamori. "Ultrasensitive detection of nonlabelled bovine serum albumin using photothermal optical phase shift detection with UV excitation." Analyst 145, no. 7 (2020): 2580–85. http://dx.doi.org/10.1039/d0an00037j.

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3

Pezzuoli, Denise, Elena Angeli, Diego Repetto, Giuseppe Firpo, Patrizia Guida, Roberto Lo Savio, Luca Repetto, and Ugo Valbusa. "Nanofluidic Chips for DNA and Nanoparticles Detection and Manipulation." Biophysical Journal 116, no. 3 (February 2019): 293a. http://dx.doi.org/10.1016/j.bpj.2018.11.1583.

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4

Liu, Junshan, Liang Wang, Wei Ouyang, Wei Wang, Jun Qin, Zheng Xu, Shenbo Xu, et al. "Fabrication of PMMA nanofluidic electrochemical chips with integrated microelectrodes." Biosensors and Bioelectronics 72 (October 2015): 288–93. http://dx.doi.org/10.1016/j.bios.2015.05.031.

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5

Zhao, Wenda, Baojun Wang, and Wei Wang. "Biochemical sensing by nanofluidic crystal in a confined space." Lab on a Chip 16, no. 11 (2016): 2050–58. http://dx.doi.org/10.1039/c6lc00416d.

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This paper introduces a novel nanofluidic crystal scheme by packing nanoparticles inside a well-designed confined space to improve the device-to-device readout consistency. The readout from different chips (n = 16) varied within 8.4% under the same conditions, which guaranteed a self-calibration-free biochemical sensing.

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6

Chen, Xueye, and Lei Zhang. "Review in manufacturing methods of nanochannels of bio-nanofluidic chips." Sensors and Actuators B: Chemical 254 (January 2018): 648–59. http://dx.doi.org/10.1016/j.snb.2017.07.139.

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7

Chen, H. Matthew, Lin Pang, Michael S. Gordon, and Yeshaiahu Fainman. "Nanofluidic Chips: Real-Time Template-Assisted Manipulation of Nanoparticles in a Multilayer Nanofluidic Chip (Small 19/2011)." Small 7, no. 19 (September 27, 2011): 2678. http://dx.doi.org/10.1002/smll.201190070.

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8

Xu, Zheng, Jun-yao Wang, De-jia Wang, Chong Liu, Yun-liang Liu, Jun-shan Liu, and Li-ding Wang. "Flexible microassembly methods for micro/nanofluidic chips with an inverted microscope." Microelectronic Engineering 97 (September 2012): 1–7. http://dx.doi.org/10.1016/j.mee.2012.02.040.

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9

Utko, Pawel, Fredrik Persson, Anders Kristensen, and Niels B. Larsen. "Injection molded nanofluidic chips: Fabrication method and functional tests using single-molecule DNA experiments." Lab Chip 11, no. 2 (2011): 303–8. http://dx.doi.org/10.1039/c0lc00260g.

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10

Sun, Lei, Lingpeng Liu, Liping Qi, Ran Guo, Kehong Li, Zhifu Yin, Dongjiang Wu, Jiangang Zhou, and Helin Zou. "Fabrication of SU-8 photoresist micro–nanofluidic chips by thermal imprinting and thermal bonding." Microsystem Technologies 26, no. 3 (July 30, 2019): 861–66. http://dx.doi.org/10.1007/s00542-019-04565-2.

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11

Pezzuoli, Denise, Elena Angeli, Diego Repetto, Patrizia Guida, Giuseppe Firpo, and Luca Repetto. "Increased Flexibility in Lab-on-Chip Design with a Polymer Patchwork Approach." Nanomaterials 9, no. 12 (November 25, 2019): 1678. http://dx.doi.org/10.3390/nano9121678.

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Nanofluidic structures are often the key element of many lab-on-chips for biomedical and environmental applications. The demand for these devices to be able to perform increasingly complex tasks triggers a request for increasing the performance of the fabrication methods. Soft lithography and poly(dimethylsiloxane) (PDMS) have since long been the basic ingredients for producing low-cost, biocompatible and flexible devices, replicating nanostructured masters. However, when the desired functionalities require the fabrication of shallow channels, the “roof collapse” phenomenon, that can occur when sealing the replica, can impair the device functionalities. In this study, we demonstrate that a “focused drop-casting” of h-PDMS (hard PDMS) on nanostructured regions, provides the necessary stiffness to avoid roof collapse, without increasing the probability of deep cracks formation, a drawback that shows up in the peel-off step, when h-PDMS is used all over the device area. With this new approach, we efficiently fabricate working devices with reproducible sub-100 nm structures. We verify the absence of roof collapse and deep cracks by optical microscopy and, in order to assess the advantages that are introduced by the proposed technique, the acquired images are compared with those of cracked devices, whose top layer, of h-PDMS, and with those of collapsed devices, made of standard PDMS. The geometry of the critical regions is studied by atomic force microscopy of their resin casts. The electrical resistance of the nanochannels is measured and shown to be compatible with the estimates that can be obtained from the geometry. The simplicity of the method and its reliability make it suitable for increasing the fabrication yield and reducing the costs of nanofluidic polymeric lab-on-chips.

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12

Ba, Dechun, Dongyang Wang, Kun Liu, Ming Hao, Guangyu Du, Yaoshuai Ba, Tong Zhu, and Zhiyong Wu. "Nanofluidic Chips for Bio-Molecules Manipulation Controlled by Back Electrodes Enclosed with Glass and Polydimethylsiloxane." Journal of Computational and Theoretical Nanoscience 13, no. 4 (April 1, 2016): 2237–44. http://dx.doi.org/10.1166/jctn.2016.4567.

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13

Xu, Yan, Chenxi Wang, Yiyang Dong, Lixiao Li, Kihoon Jang, Kazuma Mawatari, Tadatomo Suga, and Takehiko Kitamori. "Low-temperature direct bonding of glass nanofluidic chips using a two-step plasma surface activation process." Analytical and Bioanalytical Chemistry 402, no. 3 (December 3, 2011): 1011–18. http://dx.doi.org/10.1007/s00216-011-5574-2.

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14

Xu, Yan, Qian Wu, Yuji Shimatani, and Koji Yamaguchi. "Regeneration of glass nanofluidic chips through a multiple-step sequential thermochemical decomposition process at high temperatures." Lab Chip 15, no. 19 (2015): 3856–61. http://dx.doi.org/10.1039/c5lc00604j.

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15

Hrdlička, Jiří, Petr Červenka, Michal Přibyl, and Dalimil Šnita. "Mathematical modeling of AC electroosmosis in microfluidic and nanofluidic chips using equilibrium and non-equilibrium approaches." Journal of Applied Electrochemistry 40, no. 5 (July 28, 2009): 967–80. http://dx.doi.org/10.1007/s10800-009-9966-3.

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16

Wang, Chenxi, Hui Fang, Shicheng Zhou, Xiaoyun Qi, Fanfan Niu, Wei Zhang, Yanhong Tian, and Tadatomo Suga. "Recycled low-temperature direct bonding of Si/glass and glass/glass chips for detachable micro/nanofluidic devices." Journal of Materials Science & Technology 46 (June 2020): 156–67. http://dx.doi.org/10.1016/j.jmst.2019.11.034.

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17

Peng, Ran, and Dongqing Li. "Detection and sizing of nanoparticles and DNA on PDMS nanofluidic chips based on differential resistive pulse sensing." Nanoscale 9, no. 18 (2017): 5964–74. http://dx.doi.org/10.1039/c7nr00488e.

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18

Marie, Rodolphe, Jonas N. Pedersen, Loic Bærlocher, Kamila Koprowska, Marie Pødenphant, Céline Sabatel, Maksim Zalkovskij, et al. "Single-molecule DNA-mapping and whole-genome sequencing of individual cells." Proceedings of the National Academy of Sciences 115, no. 44 (October 15, 2018): 11192–97. http://dx.doi.org/10.1073/pnas.1804194115.

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To elucidate cellular diversity and clonal evolution in tissues and tumors, one must resolve genomic heterogeneity in single cells. To this end, we have developed low-cost, mass-producible micro-/nanofluidic chips for DNA extraction from individual cells. These chips have modules that collect genomic DNA for sequencing or map genomic structure directly, on-chip, with denaturation–renaturation (D-R) optical mapping [Marie R, et al. (2013) Proc Natl Acad Sci USA 110:4893–4898]. Processing of single cells from the LS174T colorectal cancer cell line showed that D-R mapping of single molecules can reveal structural variation (SV) in the genome of single cells. In one experiment, we processed 17 fragments covering 19.8 Mb of the cell’s genome. One megabase-large fragment aligned well to chromosome 19 with half its length, while the other half showed variable alignment. Paired-end single-cell sequencing supported this finding, revealing a region of complexity and a 50-kb deletion. Sequencing struggled, however, to detect a 20-kb gap that D-R mapping showed clearly in a megabase fragment that otherwise mapped well to the reference at the pericentromeric region of chromosome 4. Pericentromeric regions are complex and show substantial sequence homology between different chromosomes, making mapping of sequence reads ambiguous. Thus, D-R mapping directly, from a single molecule, revealed characteristics of the single-cell genome that were challenging for short-read sequencing.

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19

Xu, Yan, Chenxi Wang, Lixiao Li, Nobuhiro Matsumoto, Kihoon Jang, Yiyang Dong, Kazuma Mawatari, Tadatomo Suga, and Takehiko Kitamori. "Bonding of glass nanofluidic chips at room temperature by a one-step surface activation using an O2/CF4 plasma treatment." Lab on a Chip 13, no. 6 (2013): 1048. http://dx.doi.org/10.1039/c3lc41345d.

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20

Busche, Jan F., Svenja Möller, Matthias Stehr, and Andreas Dietzel. "Cross-Flow Filtration of Escherichia coli at a Nanofluidic Gap for Fast Immobilization and Antibiotic Susceptibility Testing." Micromachines 10, no. 10 (October 12, 2019): 691. http://dx.doi.org/10.3390/mi10100691.

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Infections with antimicrobial-resistant (AMR) bacteria are globally on the rise. In the future, multi-resistant infections will become one of the major problems in global health care. In order to enable reserve antibiotics to retain their effect as long as possible, broad-spectrum antibiotics must be used sparingly. This can be achieved by a rapid microfluidic phenotypic antibiotic susceptibility test, which provides the information needed for a targeted antibiotic therapy in less time than conventional tests. Such microfluidic tests must cope with a low bacteria concentration. On-chip filtering of the samples to accumulate bacteria can shorten the test time. By means of fluorescence microscopy, we examined a novel nanogap filtration principle to hold back Escherichia coli and to perform cultivation experiments with and without antibiotics present. Microfluidic chips based on the nanogap flow principle showed to be useful for the concentration and cultivation of E. coli. With a concentration of 106 cells/mL, a specific growth rate of 0.013 min−1 and a doubling time of 53 min were achieved. In the presence of an antibiotic, no growth was observed. The results prove that this principle can, in future, be used in fast and marker-free antimicrobial susceptibility testing (AST).

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21

Petruš, Ondrej, Andrej Oriňak, Renáta Oriňaková, Christian Muhmann, Ján Macko, Radim Hrdý, Jaromír Hubálek, Branislav Erdelyi, and Heinrich F. Arlinghaus. "Chemical Separation on Silver Nanorods Surface Monitored by TOF-SIMS." Journal of Chemistry 2017 (2017): 1–6. http://dx.doi.org/10.1155/2017/1608056.

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The article introduces a possible chemical separation of a mixture of two compounds on the metal nanorods surface. A silver nanorods surface has been prepared by controlled electrochemical deposition in anodic alumina oxide (AAO) template. Rhodamine 6G and 4-aminothiophenol have been directly applied to the sampling point on a silver nanorods surface in an aliquot mixture. The position of the resolved compounds was analysed by time-of-flight secondary ion mass spectrometry (TOF-SIMS) which measured the fragments and the molecular ions of the two compounds separated on the silver nanorods surface. Rhodamine 6G has been preconcentrated as 1.5 mm radial from the sampling point while 4-aminothiophenol formed a continuous self-assembled monolayer on the silver nanorods surface with a maximum molecular ion intensity at a distance of 0.5 mm from the sampling point. The separation of the single chemical components from the two-component mixture over the examined silver nanostructured films could clearly be shown. A fast separation on the mentioned nanotextured films was observed (within 50 s). This procedure can be easily integrated into the micro/nanofluidic systems or chips and different detection systems can be applied.

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22

Mohyud-Din, Syed Tauseef, Adnan, Umar Khan, Naveed Ahmed, Ilyas Khan, T. Abdeljawad, and Kottakkaran Sooppy Nisar. "Thermal Transport Investigation in Magneto-Radiative GO-MoS2/H2O-C2H6O2 Hybrid Nanofluid Subject to Cattaneo–Christov Model." Molecules 25, no. 11 (June 2, 2020): 2592. http://dx.doi.org/10.3390/molecules25112592.

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Currently, thermal investigation in hybrid colloidal liquids is noteworthy. It has applications in medical sciences, drug delivery, computer chips, electronics, the paint industry, mechanical engineering and to perceive the cancer cell in human body and many more. Therefore, the study is carried out for 3D magnetized hybrid nanofluid by plugging the novel Cattaneo–Christov model and thermal radiations. The dimensionless version of the model is successfully handled via an analytical technique. From the reported analysis, it is examined that Graphene Oxide-molybdenum disulfide/C2H6O2-H2O has better heat transport characteristics and is therefore reliable for industrial and technological purposes. The temperature of Graphene Oxide GO-molybdenum disulfide/C2H6O2-H2O enhances in the presence of thermal relaxation parameter and radiative effects. Also, it is noted that rotational velocity of the hybrid nanofluid rises for stronger magnetic parameter effects. Moreover, prevailed behavior of thermal conductivity of GO-molybdenum disulfide/C2H6O2-H2O is detected which shows that hybrid nanofluids are a better conductor as compared to that of a regular nanofluid.

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23

Mital, Manu. "Evolutionary Optimization of Electronic Circuitry Cooling Using Nanofluid." Modelling and Simulation in Engineering 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/793462.

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Liquid cooling electronics using microchannels integrated in the chips is an attractive alternative to bulky aluminum heat sinks. Cooling can be further enhanced using nanofluids. The goals of this study are to evaluate heat transfer in a nanofluid heat sink with developing laminar flow forced convection, taking into account the pumping power penalty. The proposed model uses semi-empirical correlations to calculate effective nanofluid thermophysical properties, which are then incorporated into heat transfer and friction factor correlations in literature for single-phase flows. The model predicts the thermal resistance and pumping power as a function of four design variables that include the channel diameter, velocity, number of channels, and nanoparticle fraction. The parameters are optimized with minimum thermal resistance as the objective function and fixed specified value of pumping power as the constraint. For a given value of pumping power, the benefit of nanoparticle addition is evaluated by independently optimizing the heat sink, first with nanofluid and then with water. Comparing the minimized thermal resistances revealed only a small benefit since nanoparticle addition increases the pumping power that can alternately be diverted towards an increased velocity in a pure water heat sink. The benefit further diminishes with increase in available pumping power.

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24

Ahmed Mohammed Adham, Ahmed Mohammed Adham. "Ammonia Base Nanofluid as a Coolant for Electronic Chips." International Journal of Mechanical and Production Engineering Research and Development 9, no. 3 (2019): 569–80. http://dx.doi.org/10.24247/ijmperdjun201960.

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25

Ray, Dustin R., Roy Strandberg, and Debendra K. Das. "Thermal and Fluid Dynamic Performance Comparison of Three Nanofluids in Microchannels Using Analytical and Computational Models." Processes 8, no. 7 (June 29, 2020): 754. http://dx.doi.org/10.3390/pr8070754.

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The fluid dynamic and thermal performance of three nanofluids containing aluminum oxide, copper oxide, and silicon dioxide nanoparticles dispersed in 60:40 ethylene glycol and water base fluid as a coolant in a microchannel heatsink are compared here by two methods. The first is a simple analytical analysis, which is acceptable for very low nanoparticle volumetric concentration (1–2%). The second method is a rigorous three-dimensional finite volume conjugate heat transfer and fluid dynamic model based upon a constant heat flux boundary condition, which is applicable for cooling electronic chips. The fluids’ thermophysical properties employed in the modeling are based on empirically derived, temperature dependent correlations from the literature. The analytical and computational results for pressure drop and Nusselt number were in good agreement with the nanofluids showing a maximum difference of 4.1% and 2.9%, respectively. Computations cover the practical range of Reynolds number from 20 to 200 in the laminar regime. Based on equal Reynolds number, all of the nanofluids examined generate a higher convective heat transfer coefficient in the microchannel than the base fluid, while copper oxide provided the most significant increase by 21%. Based on the analyses performed for this study, nanofluids can enhance the cooling performance of the heatsink by requiring a lower pumping power to maintain the same maximum wall temperature. Aluminum oxide and copper oxide nanofluids of 2% concentration reduce the pumping power by 23% and 22%, respectively, while maintaining the same maximum wall temperature as the base fluid.

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26

El-Khouly, M. M., M. A. El Bouz, and G. I. Sultan. "Experimental and computational study of using nanofluid for thermal management of electronic chips." Journal of Energy Storage 39 (July 2021): 102630. http://dx.doi.org/10.1016/j.est.2021.102630.

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27

Setti, Dinesh, Sudarsan Ghosh, and Venkateswara Rao Paruchuri. "Influence of nanofluid application on wheel wear, coefficient of friction and redeposition phenomenon in surface grinding of Ti-6Al-4V." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 232, no. 1 (March 11, 2016): 128–40. http://dx.doi.org/10.1177/0954405416636039.

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Difficulties in the grinding of Ti-6Al-4V originate from the three basic properties: poor thermal conductivity, high chemical reactivity and low volume specific heat of the material. Under severe grinding conditions, all these factors together lead to the accelerated wheel loading and redeposition of chips over the work surface. Redeposition and wheel loading have a significant effect on the surface finish, grinding forces, power consumption and wheel life. In this study, water-based Al2O3 nanofluid as metalworking fluid is applied during the surface grinding of Ti-6Al-4V under minimum quantity lubrication mode after dressing the wheel with different dressing overlap ratios. The severity of the redeposition over the work surface was observed by measuring various surface profiles taken perpendicular to the grinding direction at several locations on the ground surface. The nanofluid application was able to prevent redeposition over work surface that became evident from the measured surface finish parameters that results along the grinding direction. Coefficient of friction was estimated On-Machine using the measured forces for different wheel work speed ratios, depth of cut and dressing overlap ratios. The results showed the effectiveness of nanofluid in reducing friction at high material removal rate (i.e. high depth of cut and high speed ratio) conditions when compared to the dry environment. From the measured forces variation with respect to the number of passes, it became evident that, nanofluid application delayed the frequency of wheel loading and grit fracturing cycle, which leads to the increase in the wheel life.

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28

Hung Thang, Bui, Le Dinh Quang, Nguyen Manh Hong, Phan Hong Khoi, and Phan Ngoc Minh. "Application of Multiwalled Carbon Nanotube Nanofluid for 450 W LED Floodlight." Journal of Nanomaterials 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/347909.

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Overheating of the high-power light emitting diode (LED) has a dramatic effect on the chip’s lifetime. Heat dissipation for high-power LED is becoming a major challenge for researchers and technicians. Compared with the air cooling method, the liquid cooling method has many advantages and high efficiency because of higher specific heat capacity, density, and thermal conductivity. Carbon nanotubes with remarkable thermal properties have been used as additives in liquids to increase the thermal conductivity. In this work, multiwalled carbon nanotubes nanofluid (MWCNTs nanofluid) was used to enhance heat dissipation for 450 W LED floodlight. MWCNTs nanofluid was made by dispersing the OH functionalized MWCNTs in ethylene glycol/water solution. The concentration of MWCNTs in fluid was in the range between 0.1 and 1.3 gram/liter. The experimental results showed that the saturated temperature of 450 W LED chip was 55°C when using water/ethylene glycol solution in liquid cooling system. In the case of using MWCNTs nanofluid with 1.2 gram/liter of MWCNTs’ concentration, the saturated temperature of LED chip was 50.6°C. The results have confirmed the advantages of the MWCNTs for heat dissipation systems for high-power LED floodlight and other high power electronic devices.

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29

Ghasemi, Seyed Ebrahim, A. A. Ranjbar, and M. J. Hosseini. "Experimental evaluation of cooling performance of circular heat sinks for heat dissipation from electronic chips using nanofluid." Mechanics Research Communications 84 (September 2017): 85–89. http://dx.doi.org/10.1016/j.mechrescom.2017.06.009.

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30

Kandeal, A. W., Nagi M. El-Shafai, Mohamed R. Abdo, Amrit Kumar Thakur, Ibrahim M. El-Mehasseb, Ibrahem Maher, Maher Rashad, A. E. Kabeel, Nuo Yang, and Swellam W. Sharshir. "Improved thermo-economic performance of solar desalination via copper chips, nanofluid, and nano-based phase change material." Solar Energy 224 (August 2021): 1313–25. http://dx.doi.org/10.1016/j.solener.2021.06.085.

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31

Bahiraei, Mehdi, Nima Mazaheri, and Mohammad Rasool Daneshyar. "Employing elliptical pin-fins and nanofluid within a heat sink for cooling of electronic chips regarding energy efficiency perspective." Applied Thermal Engineering 183 (January 2021): 116159. http://dx.doi.org/10.1016/j.applthermaleng.2020.116159.

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32

Chen, Xueye, Shuai Zhang, Lei Zhang, Zhen Yao, Xiaodong Chen, Yue Zheng, and Yanlin Liu. "Applications and theory of electrokinetic enrichment in micro-nanofluidic chips." Biomedical Microdevices 19, no. 3 (March 31, 2017). http://dx.doi.org/10.1007/s10544-017-0168-1.

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33

Wang, Jiqiang, Yongda Yan, Yanquan Geng, Yang Gan, and Zhuo Fang. "Fabrication of polydimethylsiloxane nanofluidic chips under AFM tip-based nanomilling process." Nanoscale Research Letters 14, no. 1 (April 17, 2019). http://dx.doi.org/10.1186/s11671-019-2962-6.

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34

"Developing the protein-concentrating nanofluidic chips for early diagnostics of neurodegenerative disorders." Первое Российско-Китайское рабочее совещание по интегративной биоинформатике и компьютерной системной биологии, August 1, 2018, 15. http://dx.doi.org/10.18699/wibsb-2018-05.

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35

Wang, Chao, Sung-Wook Nam, John M. Cotte, Christopher V. Jahnes, Evan G. Colgan, Robert L. Bruce, Markus Brink, et al. "Wafer-scale integration of sacrificial nanofluidic chips for detecting and manipulating single DNA molecules." Nature Communications 8, no. 1 (January 23, 2017). http://dx.doi.org/10.1038/ncomms14243.

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36

Reid, Russell C., Marriner H. Merrill, and James P. Thomas. "Stick–slip behavior during electrowetting-on-dielectric: polarization and substrate effects." Microfluidics and Nanofluidics 24, no. 10 (September 7, 2020). http://dx.doi.org/10.1007/s10404-020-02374-y.

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Abstract A novel triple-line stick–slip behavior, manifested by “sawtooth oscillations” of the contact angle (CA), was observed during sessile droplet advance by electrowetting-on-dielectric (EWOD) for DC voltages and during droplet retreat for AC voltages. The onset of stick–slip occurred on polished substrate surfaces when the applied potential approached the EWOD saturation voltage and at lower voltages on rougher surfaces. Stick–slip was reduced at higher AC frequencies (> 1 kHz), not significantly influenced by pH or voltage polarity and did not occur with AC polarization on substrates with a Parylene coating but no hydrophobic top-layer. The different triple-line pinning behaviors under DC and AC polarization are shown to be consistent with heterogeneous wetting associated with immobilization of charged species—referred to as charge trapping—near the triple-line at saturation. These experiments and insights offer a new approach for understanding and addressing EWOD device limitations related to CA saturation and charged species trapping leading to improved performance in micro-/nanofluidic pumps, digital microfluidic chips, and electret devices. Graphical Abstract

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37

Ramu, Nalla, and P. S. Ghoshdastidar. "Computer Simulation of Mixed Convection of Alumina-Deionized Water Nanofluid Over Four In-Line Electronic Chips Embedded in One Wall of a Vertical Rectangular Channel." Journal of Thermal Science and Engineering Applications 12, no. 4 (December 24, 2019). http://dx.doi.org/10.1115/1.4045696.

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Abstract This paper presents a computational study of mixed convection cooling of four in-line electronic chips by alumina-deionized (DI) water nanofluid. The chips are flush-mounted in the substrate of one wall of a vertical rectangular channel. The working fluid enters from the bottom with uniform velocity and temperature and exits from the top after becoming fully developed. The nanofluid properties are obtained from the past experimental studies. The nanofluid performance is estimated by computing the enhancement factor which is the ratio of chips averaged heat transfer coefficient in nanofluid to that in base fluid. An exhaustive parametric study is performed to evaluate the dependence of nanoparticle volume fraction, diameter of Al2O3 nanoparticles in the range of 13–87.5 nm, Reynolds number, inlet velocity, chip heat flux, and mass flowrate on enhancement in heat transfer coefficient. It is found that nanofluids with smaller particle diameters have higher enhancement factors. It is also observed that enhancement factors are higher when the nanofluid Reynolds number is kept equal to that of the base fluid as compared with the cases of equal inlet velocities and equal mass flowrates. The linear variation in mean pressure along the channel is observed and is higher for smaller nanoparticle diameters.

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38

Vignesh, S., and U. Mohammed Iqbal. "Application of tri-hybridized carbonaceous nanocutting fluids in an end milling operation by the minimum quantity lubrication technique." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, September 13, 2021, 135065012110438. http://dx.doi.org/10.1177/13506501211043859.

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This paper is concentrated on the exploration of carbonaceous nanocutting fluids with the concept of tri-hybridization with improved lubricative and cooling properties by using multi-walled carbon nanotubes, hexagonal boron nitride , and graphene nanoparticles with neat cold-pressed coconut oil in a fixed volumetric proportion. The rheological properties of the nanofluids were studied to assess their performance in real-time end milling operations using an AA7075 work piece on a CNC lathe machine under a minimum quantity lubrication environment. At the outset, the carbonaceous nanofluids gave good performance when compared to conventional cutting fluids. Furthermore, the surfaces of the tribo-pairs and the chips formed were analyzed using a profilometer and high-end microscopes. The results obtained from the experiments confirm that the tri-hybridized carbonaceous nanolubricant has reduced the cutting force, tool wear, and surface roughness when correlated to monotype nanofluids. The scanning electron microscope images of the surface and tool were studied and it was found that the surface quality was maintained while end milling with tri-hybridized carbonaceous nanofluid. Improvement of ∼17%, 20% and 25% in cutting forces, surface roughness and tool wear was found in tri-hybrid fluid when compared to other fluids. Thus, the present work indicates that the addition of carbon-based nanoparticles with coconut oil has offered better performance and is found to be a credible alternative to existing conventional cutting fluids.

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