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Статті в журналах з теми "Nanofluidlcs"
Murshed, S. M. Sohel. "Nanofluids and Nanofluidics." Nanomaterials 12, no. 17 (August 24, 2022): 2914. http://dx.doi.org/10.3390/nano12172914.
Повний текст джерелаLin, Jianzhong, Mingzhou Yu, Martin Seipenbusch, Xiaoke Ku, and Yu Feng. "Nanofluidics and Nanofluids." Journal of Nanotechnology 2019 (May 2, 2019): 1–2. http://dx.doi.org/10.1155/2019/8767624.
Повний текст джерелаLe, Thu, Hisashi Shimizu, and Kyojiro Morikawa. "Advances in Label-Free Detections for Nanofluidic Analytical Devices." Micromachines 11, no. 10 (September 23, 2020): 885. http://dx.doi.org/10.3390/mi11100885.
Повний текст джерелаLei, Lei. "Testing algorithm for heat transfer performance of nanofluid-filled heat pipe based on neural network." Open Physics 18, no. 1 (November 13, 2020): 751–60. http://dx.doi.org/10.1515/phys-2020-0170.
Повний текст джерелаEsfe, Mohammad Hemmat, Somchai Wongwises, Saeed Esfandeh, and Ali Alirezaie. "Development of a New Correlation and Post Processing of Heat Transfer Coefficient and Pressure Drop of Functionalized COOH MWCNT Nanofluid by Artificial Neural Network." Current Nanoscience 14, no. 2 (February 1, 2018): 104–12. http://dx.doi.org/10.2174/1573413713666170913122649.
Повний текст джерелаChen, Xueye. "Molecular dynamics simulation of nanofluidics." Reviews in Chemical Engineering 34, no. 6 (November 27, 2018): 875–85. http://dx.doi.org/10.1515/revce-2016-0060.
Повний текст джерелаHan, W. S., and S. H. Rhi. "Thermal characteristics of grooved heat pipe with hybrid nanofluids." Thermal Science 15, no. 1 (2011): 195–206. http://dx.doi.org/10.2298/tsci100209056h.
Повний текст джерелаIyahraja, S., J. Selwin Rajadurai, M. Sivakumar, and N. N. Lenin. "Investigation on silver-water nanofluid for development of new viscosity correlation." Bulletin of the Chemical Society of Ethiopia 37, no. 2 (December 14, 2022): 505–14. http://dx.doi.org/10.4314/bcse.v37i2.18.
Повний текст джерелаWohld, Jake, Joshua Beck, Kallie Inman, Michael Palmer, Marcus Cummings, Ryan Fulmer, and Saeid Vafaei. "Hybrid Nanofluid Thermal Conductivity and Optimization: Original Approach and Background." Nanomaterials 12, no. 16 (August 18, 2022): 2847. http://dx.doi.org/10.3390/nano12162847.
Повний текст джерелаOuyang, Wei, Jongyoon Han, and Wei Wang. "Nanofluidic crystals: nanofluidics in a close-packed nanoparticle array." Lab on a Chip 17, no. 18 (2017): 3006–25. http://dx.doi.org/10.1039/c7lc00588a.
Повний текст джерелаДисертації з теми "Nanofluidlcs"
Cabral, Francismara Pires. "Estudo da ebulição convectiva de nanofluidos no interior de microcanais." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18147/tde-16092013-163829/.
Повний текст джерелаThe present work aims the theoretical study of convective boiling of nanofluids in small diameter channels (called microchannel). It discusses an analysis of the literature on convective boiling of conventional fluids in microchannels which presents criteria for the transition between conventional and microchannels and the flow patterns observed in small diameter channels. Methods for predicting the transport properties of nanofluids were compiled from the literature and experimental studies of forced convection, nucleate boiling and convective boiling of nanofluids were discussed. A method for predicting the heat transfer coefficient of nanofluids in microchannels during convective boiling was proposed based on conventional models from literature adjusted to nanofluids. The conventional models fitting was performed by regression analysis of experimental data for nucleate boiling and forced convection of nanofluids compiled from the literature and by critical analysis of dimensionless numbers which enable to capture the influence of nanoparticles on heat transfer process. In general the proposed method in this work presents reasonable agreement with independent experimental data regarding the increase in heat transfer coefficient with increasing nanoparticles volume fraction. However the scarcity of experimental studies on the convective boiling of nanofluids, especially in microchannels, precluded further analysis of the proposed method.
Rueda, García Daniel. "Development of novel electroactive nanofluids for flow cells." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/670918.
Повний текст джерелаLas celdas de flujo van camino de convertirse en una pieza clave para el almacenamiento de energía eléctrica (EES) gracias a su idoneidad como dispositivos de nivelación de carga, contribuyendo así al desarrollo de una red inteligente que pueda compensar la intermitencia de las fuentes de energía renovables. Hasta hace poco, las celdas de flujo se habían limitado a las baterías de flujo redox (RFB), donde el almacenamiento de energía está dado por las reacciones redox de los iones disueltos. Muy recientemente, se han propuesto nuevos tipos de electrodos líquidos basados en un mecanismo de almacenamiento capacitivo (condensadores de flujo electroquímicos o EFC). Nuestro grupo ha sido uno de los laboratorios pioneros en este tipo de nuevas celdas de flujo basadas en nanofluidos electroactivos. La presente Tesis ha tenido como objetivo aprovechar la actividad de especies electroactivas bien conocidas (quinonas, grafeno, polioxometalatos, LiFePO4) en nuevos nanofluidos electroactivos. Una parte importante de nuestra estrategia ha sido el diseño de formulaciones y sistemas híbridos que pudieran combinar mecanismos de almacenamiento faradaico (redox) y capacitivo (doble capa) para mejorar el rendimiento de las celdas de flujo resultantes. En la introducción de esta tesis se ha realizado una revisión y perspectiva ampliadas de las tecnologías de celdas de flujo electroquímicas y sus posibles líneas de evolución. Con esto se presentan el estado del arte, los problemas a resolver y las diferentes soluciones propuestas para estas tecnologías. Además, también mostramos nuestro punto de vista y perspectivas para estas tecnologías y el almacenamiento de energía eléctrica en general. Por ello esta parte constituye la parte principal de la introducción y una parte fundamental de esta tesis para entender los objetivos, motivaciones y el trabajo realizado. En el capítulo 4 se estudiaron los fundamentos electroquímicos de las quinonas en electrolitos orgánicos con sal de litio. Los mecanismos electroquímicos de las quinonas se han descrito ampliamente en la bibliografía pero en medios acuosos. En este trabajo, los estudiamos en un electrolito orgánico en un intento de aprovechar la mayor solubilidad y las ventanas de potencial más amplias disponibles en este medio. Encontramos y describimos en detalle varios problemas que impiden el funcionamiento reversible de las quinonas en los electrolitos orgánicos con Li+ que, a su vez, impiden su uso en celdas de flujo en esas condiciones. En el capítulo 5 se describe la síntesis, caracterización y rendimiento electroquímico de materiales híbridos basados en óxido de grafeno reducido (rGO) y polioxometalatos dispersos en un electrolito acuoso (H2SO4) para producir un nanofluido. Estos nanofluidos presentan baja viscosidad y muestran una respuesta electroquímica ultrarrápida e hibrida, con contribución tanto capacitiva del rGO como faradaica de los polioxometalatos. Demostrando así su funcionamiento como fluidos de almacenamiento de energía con plena carga y descarga de todo el material sólido disperso. El sexto capítulo presenta un nuevo tipo de nanofluido basado en rGO. En lugar de usar tensioactivos convencionales como en el capítulo descrito anteriormente, disolvimos una molécula aromática capaz de estabilizar el rGO en un electrolito acuoso mediante interacciones de tipo π-π. Con este enfoque logramos un gran aumento en la estabilidad del nanofluido. Además, este nuevo nanofluido también mostró una gran capacidad de transferencia de carga, como lo demuestra el hecho de que permite que se produzca actividad redox de nanopartículas de LiFePO4 (sin recubrimento conductor) simplemente dispersas en el nanofluido. Por lo tanto, gracias a la presencia de rGO en el nanofluido, los electrones podrían alcanzar las nanopartículas dispersas y, por lo tanto, cargarse y descargarse de manera efectiva y completa, algo que no es posible en nanofluidos que contienen solo nanopartículas de LiFePO4. La síntesis de grafeno también se ha estudiado en profundidad en esta tesis tal y como se puede ver en el capítulo 7, dado que el objetivo final es producir materiales que se puedan usar en aplicaciones reales, asegurarse de que los materiales con los que se trabaja se pueden producir en cantidades grandes, mediante métodos escalables y elementos abundantes es también importante. Como resultado, se ha desarrollado y patentado un nuevo método para la producción de grafeno por exfoliación electroquímica de grafito. En esta tesis se presenta la patente, un resumen de los resultados obtenidos y el estado del arte del método de exfoliación electroquímica de grafeno. En esta tesis hemos demostrado el potencial de los nanofluidos en el almacenamiento de energía electroquímica. A partir de los resultados mostrados aquí, podemos inducir conclusiones generales importantes sobre los efectos extendidos de pequeñas cantidades de sólidos en todo el volumen del nanofluido. Hemos demostrado que las dispersiones estables de rGO en agua pueden transferir la carga a través de todo el volumen de nanofluidos, lo que hace que todo el nanofluido actúe como un electrodo supercondensador que almacena la carga a través de un mecanismo capacitivo. De hecho, el nanofluido acuoso rGO mostró una transferencia de carga extremadamente rápida, pudiendo realizar ciclos a 10V·s-1. Gracias a esta rápida transferencia de carga, pudimos cargar y descargar por completo nanopartículas activas redox dispersas de LiFePO4 y detectar claramente picos redox incluso a 25 mV·s-1. Además, al dopar el rGO con especies redox activas moleculares como los polioxometalatos, desarrollamos sistemas híbridos con potencia y capacidad mejoradas con respecto al nanofluido rGO puro. Finalmente, demostramos que los nanofluidos de rGO acuosos pueden mejorar su estabilidad al disolver una molécula aromática (DABA) capaz de estabilizar rGO mediante interacciones π-π manteniendo su buena conductividad eléctrica. Todo esto ha sido posible manteniendo la viscosidad de los nanofluidos desarrollados muy cerca de los disolventes originales, lo que facilitará su aplicación final en dispositivos de flujo real. Por otro lado, la baja concentración de nanopartículas de grafeno podría ser una desventaja para la aplicación de estos materiales en dispositivos de alta densidad de energía. Por lo tanto, aumentar la carga de nanopartículas electroactivas es un objetivo importante. En resumen, hemos diseñado y preparado nanofluidos basados en grafeno pero también en híbridos de grafeno. Hemos mostrado en esta descripción general cómo estos novedosos materiales de nanofluidos pueden presentar rendimientos sobresalientes incluso en el caso de sistemas muy diluidos. Hemos demostrado efectos no lineales, que conducen a propiedades notables con pequeñas cantidades de grafeno dispersas en los nanofluidos. Por lo tanto, nuestro trabajo subraya el sólido potencial de estos sistemas para el almacenamiento de energía.
Rodríguez-Laguna, María del Rocío. "Heat transfer fluids: From fundamental aspects of graphene nanofluids at room temperature to molten salts formulations for solar-thermal conversion." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/667803.
Повний текст джерелаHeat transfer fluids and nanofluids constitute an important element in the industry and their performance is key to the successful application in technologies that go from heat management and cooling to heat exchangers in thermal-solar energy and electricity generation. These industries demand heat transfer fluids with a wider liquid temperature range and better thermal performance than the conventional fluids. From low-temperature fluids to high-temperature molten salts, these fluids seem to benefit from the dispersion of solid nanoparticles, leading to nanofluids which frequently feature improved thermal conductivities and/or specific heats as compared with the bare fluids. However, there are some exceptions. Contradictory reports make it necessary to study these materials in greater depth than has been usual. Yet, the liquid nature of these materials poses a real challenge, both from the experimental point of view and from the conceptual framework. The work reported in this thesis has tackled two different challenges related to heat transfer fluids and nanofluids. In the first place, a careful and systematic study of thermal, morphological, rheological, stability, acoustic and vibrational properties of graphene-based nanofluids was carried out. We observed a huge increase of up to 48% in thermal conductivity and 18% in heat capacity of graphene-N,N-dimethylacetamide (DMAc) nanofluids. A significant enhancement was also observed in graphene-N,N-dimethylformamide (DMF) nanofluids of approximately 25% and 12% for thermal conductivity and heat capacity, respectively. The blue shift of several Raman bands (max. ~ 4 cm-1) with increasing graphene concentration in DMF and DMAc nanofluids suggested that graphene has the ability to affect solvent molecules at long-range, in terms of vibrational energy. In parallel, numerical simulations based on density functional theory (DFT) and molecular dynamics (MD) showed a parallel orientation of DMF towards graphene, favoring π–π stacking and contributing to the modification of the Raman spectra. Furthermore, a local order of DMF molecules around graphene was observed suggesting that both this special kind of interaction and the induced local order may contribute to the enhancement of the thermal properties of the fluid. Similar studies were also performed in graphene-N-methyl-2-pyrrolidinone nanofluids, however, no modification of the thermal conductivity or the Raman spectra was observed. All these observations together suggest that there is a correlation between the modification of the vibrational spectra and the increase in the thermal conductivity of the nanofluids. In light of these results, the mechanisms suggested in the literature to explain the enhancement of thermal conductivity in nanofluids were discussed and some of them were discarded. The second line of research focused on the development and characterization of novel molten salts formulations with low-melting temperature and high thermal stability. In this regard, two novel formulations of six components based on nitrates with a melting temperature of 60-75 °C and a thermal stability up to ~ 500 °C were synthesized. Moreover, the complexity of the samples led to establish a series of experimental methods which are proposed for the melting temperature detection of these materials as an alternative to conventional calorimetry. These methods are Raman spectroscopy, three-omega technique, and optical transmission.
Meng, Huaiyu. "CMOS nanofluidics." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120374.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 217-226).
Diagnostic tests are essential to medical practice. In vitro diagnostics is a market worth US$ 40-45 billion. Diagnostic tests are usually conducted in centralized laboratories, equipped with expensive instrumentation and staffed with trained personnel. An important part of clinical diagnosis involves protein and DNA sensing. Significant effort is made to make protein and DNA sensing more accessible and affordable, through micro and nano-technologies. However, typical commercial and academic devices for molecular sensing suffered needs for external equipment, high cost and large form factors. In this work, we propose a self-contained point-of-care platform based on complementary metal oxide semiconductor (CMOS). CMOS platform has the capability of pattern features at the scale of nanometers. Important electronic functions in bio-sensing, such as amplifiers, counters and drivers are routinely implemented in CMOS. With the introduction of photonic and nanofluidic functionalities in this thesis, a CMOS chip can potentially perform biomolecular sensing without the aid of external equipment, hence becoming true lab-on-chip devices. This thesis presents the methods developed to introduce nanofluidic and photonic devices in commercial CMOS chips. We first introduce a method to fabricate nanofluidic channels in CMOS by using the transistor gate polysilicon as a sacrificial layer. A nanochannel with critical dimension of 100nm and length of 200 [mu]m is fabricated. Actuation and separation of bio-molecules in the nanochannel with electrophoresis is demonstrated. We then incorporate avalanche photodiodes (APD) in CMOS. Additionally, a packaging method is introduced to work with CMOS chips with size of a few square millimeters. With components mentioned above, clinical applications, such as gene mapping for virus identification and protein separation for cancer diagnosis and monitoring, could potentially run on a chip without external equipment.
by Huaiyu Meng.
Ph. D.
Blancafort, Jorquera Miquel. "Theoretical reaction and relaxation dynamics in superfluid helium nanodroplets." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/668116.
Повний текст джерелаLes nanogotes d’heli superfluid (HeNDs) són matrius inerts i nanoreactors ideals a baixa temperatura (0.37 K). Això ha atret l’atenció de químics doncs permeten realitzar espectroscopia d’altra resolució, estudiar la reactivitat i sintetitzar en condicions especials. L’estudi teòric de la dinàmica de processos en HeND ha estat possible tan sols fa cinc anys i, tot i el seu interès, n’hi ha molt pocs estudis. L’objectiu d’aquesta tesi és contribuir a la recerca en aquesta àrea. El Capítol 1 descriu les propietats de l’heli, la història de la superfluïdesa i les propietats i aplicacions de les HeNDs. La teoria del funcional de la densitat (DFT) i l’extensió de la mateixa depenent del temps (TDDFT), els principals funcionals per HeNDs i els mètodes numèrics es presenten al Capítol 2. Els següents capítols contenen els estudis originals d’aquesta tesi. En el Capítol 3 s’investiga la captura de Ne en una HeND on l’àtom es tracta clàssicament. El mecanisme, els intercanvis d’energia i moment angular i la formació de vòrtexs s’han analitzat àmpliament. Aquest és el primer anàlisi rigorós de la influència del moment angular en la captura i formació de vòrtexs. El Capítol 4 descriu la formació de Ne2/Ne-Ne en HeND tractant ambdós àtoms clàssicament. El mecanisme, bescanvis d’energia i moment angular i formació de vòrtexs també s’han estudiat. És el segon estudi sobre reaccions bimoleculars en HeNDs. Els Capítols 3 i 4 complementen i amplien dues investigacions del nostre grup on els àtoms es van tractar quànticament amb moment angular zero. En els propers dos capítols es consideren les relaxacions rotacional i vibracional utilitzant enfocs quàntics híbrids. El Capítol 5 correspon al primer estudi teòric de la relaxació rotacional de molècules en HeNDs, i s’han considerat varis isòtops de H2 i excitacions inicials i mides de nanogota. El Capítol 6 detalla la influència de la separació energètica vibracional, interacció molècula-heli i mida de nanogota en la relaxació vibracional en HeNDs, agafant com a referència el sistema I2@(4He)100. És el primer cop que s’examina l’efecte d’aquestes propietats clau. Els Capítols 7 i 8 presenten les principals conclusions i un resum en català, respectivament.
Las nanogotas de helio superfluido (HeNDs) son matrices inertes y nanoreactores ideales a baja temperatura (0.37 K). Esto ha atraído a los químicos pues posibilitan realizar espectroscopia de alta resolución, así como estudiar de la reactividad y síntesis en condiciones especiales. La dinámica teórica de procesos en HeND ha sido posible tan sólo hace cinco años y, a pesar de su interés, todavía hay muy pocos estudios. Esta tesis pretende contribuir a la investigación en esta área. El Capítulo 1 describe las propiedades del helio, la superfluidez y las propiedades y aplicaciones de las HeNDs. La teoría del funcional de la densidad (DFT) y su extensión dependiente del tiempo (TDDFT), los principales funcionales para HeNDs y los métodos numéricos se presentan en el Capítulo 2. Los siguientes capítulos contienen los estudios originales de esta tesis. En el Capítulo 3 se investiga la captura de Ne en una HeND donde el átomo se trata clásicamente. El mecanismo microscópico, intercambios de energía y momento angular y formación de vórtices se han analizado ampliamente. Este es el primer análisis detallado de la influencia del momento angular en la captura y la formación de vórtices. El Capítulo 4 describe la formación de Ne2/Ne-Ne en HeND tratando ambos átomos clásicamente. El mecanismo, intercambios de energía y momento angular y formación de vórtices también se han estudiado. Los Capítulos 3 y 4 complementan y amplían dos investigaciones de nuestro grupo donde los átomos se trataron cuánticamente con momento angular cero. En los dos capítulos siguientes se estudian las relajaciones rotacional y vibracional utilizando enfoques cuánticos híbridos. El Capítulo 5 corresponde al primer estudio teórico de la relajación rotacional de moléculas en HeNDs, y se han considerando varios isótopos de H2, excitaciones iniciales y tamaños de nanogota. El Capítulo 6 detalla la influencia de la separación energética, interacción molécula-helio y tamaño de nanogota en la relajación vibracional en HeND, habiéndose tomando como referencia el sistema I2@(4He)100. Es la primera vez que se examina el efecto de estas propiedades clave en la dinámica. Los Capítulos 7 y 8 presentan las principales conclusiones y un resumen en catalán, respectivamente.
Hamze, Samah. "Graphene based nanofluids : development, characterization and application for heat and energy systems." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1S010.
Повний текст джерелаIn our daily lives, the heat and energy transfer forms the basis of many industrial processes. The gradual depletion of fossil fuels leads to improving and optimizing the efficiency of these exchanges through new processes. To this end, the idea of improving the thermal performance of fluids in heat exchangers has been proposed forward to reduce the energy consumed for heat exchange. This idea is based on the introduction of solid nanoparticles, which have much greater thermal properties than heat-transfer fluids in the latter, obtaining a nanofluid. This introduction has the effect of increasing the thermal conductivity of the fluid but on the other hand causes an unfavorable increase in its viscosity, which results in an increase in pumping power. So a compromise has to be made between the stability, thermal conductivity and viscosity of nanofluids. In this study, few layer graphene based nanofluids and a commercial fluid, Tyfocor® LS, were prepared in the weight concentration range 0.05-0.5% using three different surfactants. A complete study on these nanofluids is presented, including the synthesis of the graphene sheets, the preparation of the nanofluids and the study of their stability, as well as the experimental evaluation of their thermo-physical properties as a function of the graphene concentration, the type of surfactant used and the temperature in the range 283.15-323.15 K. Finally, on the basis of these results and through a qualitative approach, the potential application of nanofluids in energy systems is determined in order to select the best candidate. The results showed a good improvement of the thermal performance compared to the base fluids in the tested temperature range and especially the nanofluid of the Pluronic® P-123 surfactant series with a mass concentration of 0.25%
Gravelle, Simon. "Nanofluidics : a theoretical and numerical investigation of fluid transport in nanochannels." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10238.
Повний текст джерелаThis thesis discusses various situations linked to transport at the nanoscale. The first chapter is an introduction to nanofluidics, containing a review of characteristic lengths, forces, or phenomena existing at the nanoscale. The second chapter is a study of the impact of geometry on the hydrodynamic permeability of a nanopore. This study, inspired by the shape of aquaporins, suggests a possible optimisation of permeability for bi-conical channels. The third chapter is a study of capillary filing inside subnanometric carbon channels which highlights the importance of the disjoining pressure induced by the fluid structuring inside the nanochannel. The fourth chapter is a study of nanofluidic diode, a component known to mimic the behaviour of semiconductor diode. The study highlights a strong coupling between water and ion dynamics which leads to a water flow rectification inside the diode. The fifth and last chapter is a study of the origin of commonly observed pink noise (1=f) in ionic current measurements through nanopores
Moreira, Tiago Augusto. "Análise experimental da influência da adição de nanopartículas a água no coeficiente de transferência de calor para escoamentos monofásicos e ebulição convectiva em microcanais." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18147/tde-10032017-091729/.
Повний текст джерелаMicrochannels based heat exchangers were introduced as a solution to high heat flux removal in restrict spaces due to their high heat transfer coefficients compared to heat exchangers based on conventional channels. The high ratio of surface are per volume is an additional advantage to microchannels in relation to conventional channels. Beside the microchannels technology, the nanofluids also present itself as a technique with potential to increase the heat transfer coefficient. Nanofluids consist of a solution containing nanoparticles dispersed in a base fluid with the goal to improve its thermodynamic and transport properties. In this context, the objective of the present study is to evaluate the heat transfer coefficient for single-phase flow and convective boiling of aqueous nanofluids inside microchannels. Experiments were performed for channels with internal diameter of 1.1mm and 200 mm long for DI-water, nanofluids containing alumina- (nanoparticles diameters of 20-30 and 40-80 nm), silicon dioxide (nanoparticles diameters of 15 and 80 nm), and copper (nanoparticles diameter of 25 nm). These solutions were evaluated for volumetric concentrations of 0.001, 0.01 and 0.1%, mass velocities of 200, 400 and 600 kg/m2s and heat fluxes from 20 to 350 kW/m2. The analysis of the results revealed that the addition of nanoparticles to DI-water causes an increment in the Nusselt number for single phase flows, especially at the inlet of the tube. The results for flow boiling indicated that the effects of adding nanoparticles to the base fluid are related to the deposition on the heating surface of a nanoparticles porous layer due to the boiling process. The deposition of nanoparticles smaller than 30 nm promoted a reduction of the heat transfer coefficient compared to DI-water on a clean surface, and thermal instabilities were minimized. For the deposition of nanoparticles larger than 40 nm these parameters did not presented significant variations in comparison to DI-water. A combined analysis of the surfaces finishing and the criterion of Kandlikar et al. (1997) for bubble nucleation revealed that such behaviors are correlated to the effects of the surface texture associated to the boiling process on the density of active nucleation cavities.
Cunha, Alex Pereira da. "A method for measuring contact angle and influence of surface fluid parameters on the boiling heat transfer performance /." Ilha Solteira, 2019. http://hdl.handle.net/11449/183048.
Повний текст джерелаResumo: O avanço de novas tecnologias, associado à minimização dos custos de fabricação e instala-ção, constitui um grande desafio para a área de refrigeração, uma vez que a geração de calor tem aumentado gradativamente nos últimos anos. Assim, a busca de novos fluidos com pro-priedades térmicas superiores aos comumente usados tornou-se indispensável para melhorar a eficiência energética. Nas últimas décadas os nanofluidos - dispersões de partículas de escala nanométrica (1 a 100nm) em um fluido-base - têm atraído especial interesse não somente da comunidade acadêmica, mas também da indústria em áreas como: a microeletrônica, microflu-ídica, transporte, manufatura, assistência médica, entre outras. O melhor desempenho térmico e a vasta gama de aplicações fazem dos nanofluidos potenciais substitutos dos refrigerantes utilizados em diversos segmentos da engenharia. Dentro desse contexto, o presente trabalho teve como objetivos: o estudo teórico e experimental da influência das propriedades termofísi-cas e concentração de nanofluidos, bem como, das características geométricas da superfície aquecedora sobre o ângulo de contato e a molhabilidade. Também, atenção foi dada à prepa-ração e caracterização dos nanofluidos (Al2O3-água e Fe2O3-água), por meio da análise expe-rimental da condutividade térmica e da viscosidade dinâmica para diferentes concentrações; uma bancada experimental, para aquisição de imagens de gota séssil, foi construída a fim de viabilizar as análises de ângulo de conta... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The advance of new technologies, associated to the minimization of manufacturing and installation costs, presents a great challenge for the refrigeration area, since the heat generation has increased in recent years. Thus, the search for new fluids with thermal properties higher than those commonly used has become indispensable to improve energy efficiency. In recent decades, nanofluids-dispersions of nanometer-scale particles (1 to 100 nm) in a base fluid - have attracted special interest not only from the academic community but also from industry in areas such as microelectronics, microfluidics, transport, manufacturing, medical assistance, among others. In this context, the present work had the following goals: the theoretical and experimental study of the influence of thermophysical properties and nanofluid concentration, as well as the geometric characteristics of the heating surface on the contact angle and wetta-bility. Attention was also given to the preparation and characterization of nanofluids (Al2O3-water and Fe2O3-water) by the experimental analysis of thermal conductivity and dynamic viscosity for different concentrations; an experimental apparatus for the acquisition of sessile droplet images was designed in order to analyze the contact angle and wettability; and a computational routine was developed to obtain the drop profile and the surface-fluid interaction for the different nanofluids and surfaces used. Based on database, it was possible to evaluate the pre... (Complete abstract click electronic access below)
Doutor
Mondragón, Cazorla Rosa. "Estudio de la cinética de secado de gotas de nanofluidos, y caracterización microestructural y mecánica de los gránulos obtenidos." Doctoral thesis, Universitat Jaume I, 2013. http://hdl.handle.net/10803/664050.
Повний текст джерелаThe spray drying process is present in numerous industrial applications. A field of special interest, in which said process is used, is the obtaining of nanostructured granules from nano-sized raw materials. In this work, a study of the drying process of nanofluid droplets has been carried out in an acoustic levitator. The study has been extended to the drying of suspension droplets containing mixtures of nanoparticles and microparticles. The influence of the variables of interest on the kinetics of drying, the packing of the particles inside the granule, its internal microstructure and its mechanical resistance has been analyzed and modeled. Finally, the results obtained in the drying of individual droplets in the acoustic levitator have been validated at pilot plant scale by spray drying of different suspensions.
Книги з теми "Nanofluidlcs"
Abgrall, Patrick. Nanofluidics. Boston: Artech House, 2009.
Знайти повний текст джерела1970-, Nguyen Nam-Trung, ed. Nanofluidics. Boston: Artech House, 2009.
Знайти повний текст джерелаLi, Zhigang. Nanofluidics. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor &: CRC Press, 2018. http://dx.doi.org/10.1201/b22007.
Повний текст джерелаMichaelides, Efstathios E. Nanofluidics. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05621-0.
Повний текст джерелаEdel, Joshua, Aleksandar Ivanov, and MinJun Kim, eds. Nanofluidics. Cambridge: Royal Society of Chemistry, 2016. http://dx.doi.org/10.1039/9781849735230.
Повний текст джерелаEdel, Joshua, and Andrew deMello, eds. Nanofluidics. Cambridge: Royal Society of Chemistry, 2008. http://dx.doi.org/10.1039/9781847558909.
Повний текст джерелаKleinstreuer, Clement. Microfluidics and Nanofluidics. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118749890.
Повний текст джерелаPrabhu, K. Narayan, ed. Nanofluids. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2012. http://dx.doi.org/10.1520/stp1567-eb.
Повний текст джерелаNanofluids. West Conshohocken, PA: ASTM International, 2012.
Знайти повний текст джерелаLi, Dongqing. Electrokinetic Microfluidics and Nanofluidics. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-16131-5.
Повний текст джерелаЧастини книг з теми "Nanofluidlcs"
Han, Jongyoon. "Nanofluidics." In Introduction to Nanoscale Science and Technology, 575–97. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/1-4020-7757-2_24.
Повний текст джерелаYoda, Minami, Jean-Luc Garden, Olivier Bourgeois, Aeraj Haque, Aloke Kumar, Hans Deyhle, Simone Hieber, et al. "Nanofluidics." In Encyclopedia of Nanotechnology, 1543. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100500.
Повний текст джерелаHarikrishnan, S., and A. D. Dhass. "Nanofluids." In Thermal Transport Characteristics of Phase Change Materials and Nanofluids, 119–24. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003163633-8.
Повний текст джерелаHarikrishnan, S., A. D. Dhass, and Hafiz Muhammad Ali. "Nanofluids." In Thermal Performance of Nanofluids in Miniature Heat Sinks with Conduits, 1–28. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7845-5_1.
Повний текст джерелаPhan, Vinh-Nguyen, Nam-Trung Nguyen, Chun Yang, and Patrick Abgrall. "Applications of Nanofluidics." In Encyclopedia of Nanotechnology, 1–8. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6178-0_143-2.
Повний текст джерелаAliano, Antonio, Giancarlo Cicero, Hossein Nili, Nicolas G. Green, Pablo García-Sánchez, Antonio Ramos, Andreas Lenshof, et al. "Applications of Nanofluidics." In Encyclopedia of Nanotechnology, 121–27. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_143.
Повний текст джерелаLi, Zhigang. "Introduction to nanofluidics." In Nanofluidics, 29–44. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor &: CRC Press, 2018. http://dx.doi.org/10.1201/b22007-2.
Повний текст джерелаKim, Daejoong, Kilsung Kwon, Deok Han Kim, and Longnan Li. "Nanofluidic RED." In SpringerBriefs in Applied Sciences and Technology, 43–44. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-0314-2_6.
Повний текст джерелаYoda, Minami, Jean-Luc Garden, Olivier Bourgeois, Aeraj Haque, Aloke Kumar, Hans Deyhle, Simone Hieber, et al. "Nanofluidic Channels." In Encyclopedia of Nanotechnology, 1543. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100499.
Повний текст джерелаMichaelides, Efstathios E. "Fundamentals of Nanoparticle Flow and Heat Transfer." In Nanofluidics, 1–45. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05621-0_1.
Повний текст джерелаТези доповідей конференцій з теми "Nanofluidlcs"
Han, Jongyoon, and Harold G. Craighead. "From microfluidics to nanofluidics: DNA separation using nanofluidic entropic trap array device." In Micromachining and Microfabrication, edited by Carlos H. Mastrangelo and Holger Becker. SPIE, 2000. http://dx.doi.org/10.1117/12.395654.
Повний текст джерелаKarnik, Rohit, Kenneth Castelino, Chuanhua Duan, Rong Fan, Peidong Yang, and Arun Majumdar. "Nanofluidic Devices for Sensing and Flow Control." In ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2006. http://dx.doi.org/10.1115/icnmm2006-96156.
Повний текст джерелаWei, Jianjun, Hongjun Song, Sameer Singhal, Matthew Kofke, Madu Mendis, and David Waldeck. "An In-Plane Nanofluidic Nanoplasmonics-Based Platform for Biodetection." In ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/mnhmt2012-75206.
Повний текст джерелаMills, K. L., Dongeun Huh, Shuichi Takayama, and M. D. Thouless. "Adjustable Nanofluidic Channels by Tunnel Cracking of a Constrained Brittle Layer." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62164.
Повний текст джерелаScheibel, Olivia V., David Lanza, and Michael G. Schrlau. "Template-Based Synthesis of Integrated Carbon Micro- and Nanostructures." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71674.
Повний текст джерелаO’Hanley, Harry, Jacopo Buongiorno, Thomas McKrell, and Lin-wen Hu. "Measurement and Model Correlation of Specific Heat Capacity of Water-Based Nanofluids With Silica, Alumina and Copper Oxide Nanoparticles." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62054.
Повний текст джерелаAlfi, M., H. Nasrabadi, and D. Banerjee. "Confinement Effects on Phase Behavior of Hydrocarbon in Nanochannels." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52845.
Повний текст джерелаTaylor, Robert A., Patrick E. Phelan, Ronald J. Adrian, Todd Otanicar, and Ravi S. Prasher. "Experimental Results for Light-Induced Boiling in Water-Based Graphite Nanoparticle Suspensions." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88176.
Повний текст джерелаTakayama, Shuichi, Yi-Chung Tung, and Bor-Han Chueh. "Biological Micro/Nanofluidics." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52087.
Повний текст джерелаErickson, David, Teresa Emery, Troy Rockwood, Axel Scherer, and Demetri Psaltis. "Integration of Sub-Wavelength Nanofluidics With Photonic Crystals." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81715.
Повний текст джерелаЗвіти організацій з теми "Nanofluidlcs"
Pawel Keblinski. Fundamentals of Energy Transport in Nanofluids. Office of Scientific and Technical Information (OSTI), February 2007. http://dx.doi.org/10.2172/924115.
Повний текст джерелаRamsey, J. Michael. Nanofluidic Structures for Electrokinetic-Based Hydraulic Pumps. Office of Scientific and Technical Information (OSTI), June 2004. http://dx.doi.org/10.2172/839258.
Повний текст джерелаGourley, Paul Lee, Anthony Eugene McDonald, and Judy K. Hendricks. Nanofluidic devices for rapid detection of virus particles. Office of Scientific and Technical Information (OSTI), January 2005. http://dx.doi.org/10.2172/921716.
Повний текст джерелаGharagozloo, Patricia E., and Kenneth E. Goodson. Characterization and modeling of thermal diffusion and aggregation in nanofluids. Office of Scientific and Technical Information (OSTI), May 2010. http://dx.doi.org/10.2172/993305.
Повний текст джерелаJeyashekar, Nigil S. Scanning Electron Microscope Studies on Aggregation Characteristics of Alumina Nanofluids. Fort Belvoir, VA: Defense Technical Information Center, August 2013. http://dx.doi.org/10.21236/ada602578.
Повний текст джерелаFornasiero, Francesco. Unraveling the physics of nanofluidic phenomena at the single-molecule level. Office of Scientific and Technical Information (OSTI), October 2015. http://dx.doi.org/10.2172/1240944.
Повний текст джерелаCropek, Donald M., Paul W. Bohn :In-Hyoung, Jonathan Sweedler, Yi Lu, Carla Swearingen, and Daryl Wernette. Metal Ion Sensor with Catalytic DNA in a Nanofluidic Intelligent Processor. Fort Belvoir, VA: Defense Technical Information Center, February 2005. http://dx.doi.org/10.21236/ada631384.
Повний текст джерелаTaborek, Peter. Nanoscale Heat Transfer Due to Near Field Radiation and Nanofluidic Flows. Fort Belvoir, VA: Defense Technical Information Center, July 2015. http://dx.doi.org/10.21236/ada625941.
Повний текст джерелаGlobus, Tatiana, Aaron Moyer, Jerome Ferrance, Igor Sizov, and Tatyana Khromova. Development of a Biosensor Nanofluidic Platform for Integration with Terahertz Spectroscopic System. Fort Belvoir, VA: Defense Technical Information Center, January 2013. http://dx.doi.org/10.21236/ada587044.
Повний текст джерелаRoutbort, J., D. Singh, E. Timofeeva, W. Yu, and D. France. Developmemt, characterization, production, and demonstration of nanofluids for industrial cooling applications. Quarterly report #7. Office of Scientific and Technical Information (OSTI), July 2010. http://dx.doi.org/10.2172/983764.
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