Relevant bibliographies by topics / Microfluidics. Nanofluids Heat

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Microfluidics. Nanofluids Heat'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Microfluidics. Nanofluids Heat.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Microfluidics. Nanofluids Heat"

1

N.S., Shashikumar, Gireesha B.J., B. Mahanthesh, and Prasannakumara B.C. "Brinkman-Forchheimer flow of SWCNT and MWCNT magneto-nanoliquids in a microchannel with multiple slips and Joule heating aspects." Multidiscipline Modeling in Materials and Structures 14, no. 4 (December 3, 2018): 769–86. http://dx.doi.org/10.1108/mmms-01-2018-0005.

Full text
Abstract:
Purpose The microfluidics has a wide range of applications, such as micro heat exchanger, micropumps, micromixers, cooling systems for microelectronic devices, fuel cells and microturbines. However, the enhancement of thermal energy is one of the challenges in these applications. Therefore, the purpose of this paper is to enhance heat transfer in a microchannel flow by utilizing carbon nanotubes (CNTs). MHD Brinkman-Forchheimer flow in a planar microchannel with multiple slips is considered. Aspects of viscous and Joule heating are also deployed. The consequences are presented in two different carbon nanofluids. Design/methodology/approach The governing equations are modeled with the help of conservation equations of flow and energy under the steady-state situation. The governing equations are non-dimensionalized through dimensionless variables. The dimensionless expressions are treated via Runge-Kutta-Fehlberg-based shooting scheme. Pertinent results of velocity, skin friction coefficient, temperature and Nusselt number for assorted values of physical parameters are comprehensively discussed. Also, a closed-form solution is obtained for momentum equation for a particular case. Numerical results agree perfectly with the analytical results. Findings It is established that multiple slip effect is favorable for velocity and temperature fields. The velocity field of multi-walled carbon nanotubes (MWCNTs) nanofluid is lower than single-walled carbon nanotubes (SWCNTs)-nanofluid, while thermal field, Nusselt number and drag force are higher in the case of MWCNT-nanofluid than SWCNT-nanofluid. The impact of nanotubes (SWCNTs and MWCNTs) is constructive for thermal boundary layer growth. Practical implications This study may provide useful information to improve the thermal management of microelectromechanical systems. Originality/value The effects of CNTs in microchannel flow by utilizing viscous dissipation and Joule heating are first time investigated. The results for SWCNTs and MWCNTs have been compared.
APA, Harvard, Vancouver, ISO, and other styles
2

Costa, R. C. S. M., and M. F. Curi. "IMPACT OF NANOFLUIDS ON EXTERNAL AND INTERNAL FLOW VIA NAVIER-STOKES AND CONVECTIONDIFFUSION EQUATIONS FOR PARALLEL PLATES WITH SLIP BOUNDARY CONDITIONS." Revista de Engenharia Térmica 20, no. 1 (April 12, 2021): 45. http://dx.doi.org/10.5380/reterm.v20i1.80446.

Full text
Abstract:
With the modernization and miniaturization of equipment and systems toincrease the overall efficiency in smaller spaces, new cooling solutions needto be developed. Microfluidic in the last decades becomes a new way to getthis. Nanofluids are used to attend this demand to optimize efficiency, withtheir improved thermohydraulic properties, especially different thermalconductivities. To determine the advantages of using a nanofluid for thermalexchange, the properties, parameters and modelling will be presented, and thedifferential equations necessary to obtain the results. In that sense, the basictheory of fluid mechanics and heat transfer, through the Navier-Stokes andConvection-Diffusion equation, is used in the two-dimensional steady-stateformulation. Slip boundary conditions for the velocity field. Constant heat fluxand constant temperature at the surface are used for the temperature field,initially without the flow’s microscale effects. The external flow over a flatplate and internal flow between parallel plates will be studied. Considering alaminar flow, with the base fluid being water and engine oil, with variousvolumetric fractions of Single Wall and Multiple Wall Carbon Nanotubes. Todetermine the results and create the comparative graphs, the WolframMathematica v.11 software will be used for solving the remaining partialdifferential equations.
APA, Harvard, Vancouver, ISO, and other styles
3

Tuz Zohra, Fatema, Mohammed Jashim Uddin, Md Faisal Basir, and Ahmad Izani Md Ismail. "Magnetohydrodynamic bio-nano-convective slip flow with Stefan blowing effects over a rotating disc." Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems 234, no. 3-4 (November 4, 2019): 83–97. http://dx.doi.org/10.1177/2397791419881580.

Full text
Abstract:
Microfluidic-related technologies and micro-electromechanical systems–based microfluidic devices have received applications in science and engineering fields. This article is the study of a mathematical model of steady forced convective flow past a rotating disc immersed in water-based nanofluid with microorganisms. The boundary layer flow of a viscous nanofluid is studied with multiple slip conditions and Stefan blowing effects under the magnetic field influence. The microscopic nanoparticles move randomly and have the characteristics of thermophoresis, and it is being considered that the change in volume fraction of the nanofluid does not affect the thermo-physical properties. The governing equations are nonlinear partial differential equations. At first, the nonlinear partial differential equations are converted to system of nonlinear ordinary differential equations using suitable similarity transformations and then solved numerically. The influence of relevant parameters on velocities, temperature, concentration and motile microorganism density is illustrated and explained thoroughly. This investigation indicated that suction provides a better medium to enhance the transfer rate of heat, mass and microorganisms compared to blowing. This analysis has a wide range engineering application such as electromagnetic micro pumps and nanomechanics.
APA, Harvard, Vancouver, ISO, and other styles
4

Murshed, S. M. Sohel, Say Hwa Tan, Nam Trung Nguyen, Teck Neng Wong, and Levent Yobas. "Microdroplet formation of water and nanofluids in heat-induced microfluidic T-junction." Microfluidics and Nanofluidics 6, no. 2 (July 2, 2008): 253–59. http://dx.doi.org/10.1007/s10404-008-0323-3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Shashikumar, N. S., Madhu Macha, B. J. Gireesha, and Naikoti Kishan. "Finite element analysis of micropolar nanofluid flow through an inclined microchannel with thermal radiation." Multidiscipline Modeling in Materials and Structures 16, no. 6 (May 6, 2020): 1521–38. http://dx.doi.org/10.1108/mmms-11-2019-0198.

Full text
Abstract:
PurposeIn recent years, microfluidics has turned into a very important region of research because of its wide range of applications such as microheat exchanger, micromixers fuel cells, cooling systems for microelectronic devices, micropumps and microturbines. Therefore, in this paper, micropolar nanofluid flow through an inclined microchannel is numerically investigated in the presence of convective boundary conditions. Heat transport of fluid includes radiative heat, viscous and Joule heating phenomena.Design/methodology/approachGoverning equations are nondimensionalized by using suitable dimensionless variables. The relevant dimensionless ordinary differential systems are solved by using variational finite element method. Detailed computations are done for velocity, microrotation and temperature functions. The influence of various parameters on entropy generation and the Bejan number is displayed and discussed.FindingsIt is established that the entropy generation rate increased with both Grashof number and Eckert number, while it decreased with nanoparticle volume fraction and material parameter. Temperature is decreased by increasing the volume fraction of Ag nanoparticle dispersed in water.Originality/valueAccording to the literature survey and the best of the author’s knowledge, no similar studies have been executed on micropolar nanofluid flow through an inclined microchannel with effect of viscous dissipation, Joule heating and thermal radiation.
APA, Harvard, Vancouver, ISO, and other styles
6

Ahmad, Sohail, Muhammad Ashraf, and Kashif Ali. "Nanofluid flow comprising gyrotactic microbes through a porous medium - a numerical study." Thermal Science, no. 00 (2020): 332. http://dx.doi.org/10.2298/tsci190712332a.

Full text
Abstract:
Researchers have significantly contributed to heat transfer field and always made out much effort to find new solutions of heat transfer augmentation. In the concerned work, we have presented a novel study regarding heat and mass transfer flow of nanofluid in the presence of gyrotactic microbes through a porous medium past a stretching sheet. The nonlinear coupled ODEs are obtained after applying the persuasive tool of similarity transformation on governing model PDEs and then tackled numerically by exploiting the SOR (Successive over Relaxation) parameter method. The outcomes of assorted parameters for the flow are surveyed and discussed through graphs and tables. A graphical comparison is correlated with previously accomplished study and examined to be in an exceptional agreement. The culminations designate that the bioconvection Peclet number and microorganism concentration difference parameter enhance density of the motile microorganisms. Moreover, porosity parameter substantially increases shear stress on sheet surface. The addition of nanoparticles in microorganisms is beneficial to improvise the thermal efficiency of many systems like bacteria powered micro-mixers, microfluidics devices like micro-volumes and enzyme biosensor, microbial fuel cells and bio-microsystems like chip-shaped microdevices.
APA, Harvard, Vancouver, ISO, and other styles
7

Mondal, Surya Kanta, and Dulal Pal. "Mathematical analysis for Brownian motion of nonlinear thermal bioconvective stagnation point flow in a nanofluid using DTM and RKF method." Journal of Computational Design and Engineering 7, no. 3 (April 3, 2020): 294–307. http://dx.doi.org/10.1093/jcde/qwaa025.

Full text
Abstract:
Abstract In the present paper, bioconvective stagnation point flow of nanofluid containing gyrotactic microorganisms over a nonlinearly stretching sheet embedded in a porous medium is considered. The scaling group transformation method is introduced to obtain the similarity transformation to convert the governing partial differential equations to a set of ordinary differential equations. The reduced governing nonlinear differential equations are then solved numerically with Runge–Kutta–Fehlberg method. Differential transform method is employed to justify the results obtained by the numerical method. It is found that both the results matched nicely. It is noticed that the density of motile microorganism distribution grows high with an increase in the values of the bioconvection Peclet number. Further, the rate of heat transfer and the rate of mass transfer increase rapidly with an increment in the thermophoresis parameter, heat source parameter, chemical reaction parameter, and Brownian motion parameter, respectively. This work is relevant to engineering and biotechnological applications, such as in the design of bioconjugates and mass transfer enhancement of microfluidics.
APA, Harvard, Vancouver, ISO, and other styles
8

Abdelmalek, Zahra, Sami Ullah Khan, Hassan Waqas, Hossam A. Nabwey, and Iskander Tlili. "Utilization of Second Order Slip, Activation Energy and Viscous Dissipation Consequences in Thermally Developed Flow of Third Grade Nanofluid with Gyrotactic Microorganisms." Symmetry 12, no. 2 (February 21, 2020): 309. http://dx.doi.org/10.3390/sym12020309.

Full text
Abstract:
In recent decades, an interest has been developed towards the thermal consequences of nanofluid because of utilization of nano-materials to improve the thermal conductivity of traditional liquid and subsequently enhance the heat transportation phenomenon. Following this primarily concept, this current work investigates the thermal developed flow of third-grade nanofluid configured by a stretched surface with additional features of activation energy, viscous dissipation and second-order slip. Buongiorno’s nanofluid model is used to explore the thermophoresis and Brownian motion features based on symmetry fundamentals. It is further assumed that the nanoparticles contain gyrotactic microorganisms, which are associated with the most fascination bioconvection phenomenon. The flow problem owing to the partial differential equations is renovated into dimensional form, which is numerically simulated with the help of bvp4c, by using MATLAB software. The aspects of various physical parameters associated to the current analysis are graphically examined against nanoparticles’ velocity, temperature, concentration and gyrotactic microorganisms’ density distributions. Further, the objective of local Nusselt number, local Sherwood number and motile density number are achieved numerically with variation of various parameters. The results presented here may find valuable engineering applications, like cooling liquid metals, solar systems, power production, solar energy, thermal extrusion systems cooling of machine equipment, transformer oil and microelectronics. Further, flow of nanoparticles containing gyrotactic microorganisms has interesting applications in microbial fuel cells, microfluidic devices, bio-technology and enzyme biosensors.
APA, Harvard, Vancouver, ISO, and other styles
9

Ramesh, K., and J. Prakash. "Thermal analysis for heat transfer enhancement in electroosmosis-modulated peristaltic transport of Sutterby nanofluids in a microfluidic vessel." Journal of Thermal Analysis and Calorimetry 138, no. 2 (November 28, 2018): 1311–26. http://dx.doi.org/10.1007/s10973-018-7939-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Nikkam, Nader, Morteza Ghanbarpour, Rahmatollah Khodabandeh, and Muhammet S. Toprak. "Experimental investigation on thermophysical properties of ethylene glycol based copper micro- and nanofluids for heat transfer applications." MRS Proceedings 1779 (2015): 69–74. http://dx.doi.org/10.1557/opl.2015.743.

Full text
Abstract:
ABSTRACTThe present work reports on the fabrication, experimental and theoretical investigation of thermal conductivity (TC) and viscosity of ethylene glycol (EG) based nanofluids/microfluids (NFs/MFs) containing copper nanoparticles (Cu NPs) and copper microparticles (Cu MPs). Cu NPs (20-40 nm) and Cu MPs (0.5-1.5 μm) were dispersed in EG with particle concentration from 1 wt% to 3 wt% using powerful ultrasonic agitation, and to study the real impact of dispersed particles the use of surface modifier was avoided. The objectives were to study the effect of concentration and impact of size of Cu particles on thermo-physical properties, including thermal TC and viscosity, of EG based Cu NFs/MFs. The physicochemical properties of NPs/MPs and NFs/MFs were characterized by using various techniques. The experimental results exhibited higher TC of NFs and MFs than the EG base liquid. Moreover, Cu NFs displayed higher TC than MFs showing their potential for use in some heat transfer applications. Maxwell effective medium theory as well as Einstein law of viscosity was used to compare the experimental data with the predicted values for estimating the TC and viscosity of Cu NFs/MFs, respectively.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Microfluidics. Nanofluids Heat"

1

Ozturk, Serdar 1979. "Microfluidic Investigation of Tracer Dye Diffusion in Alumina Nanofluids." Thesis, 2012. http://hdl.handle.net/1969.1/148127.

Full text
Abstract:
Nanofluids, a new class of fluids engineered by suspending nanometer-sized particles in a host liquid, are offered as a new strategy in order to improve heat and mass transfer efficiency. My research was motivated by previous exciting studies on enhanced mass diffusion and the possibility of tailoring mass transport by direct manipulation of molecular diffusion. Therefore, a microfluidic approach capable of directly probing tracer diffusion between nanoparticle-laden fluid streams was developed. Under conditions matching previously reported studies, strong complexation interactions between the dye and nanoparticles at the interface between fluid streams was observed. When the tracer dye and surfactant were carefully chosen to minimize the collective effects of the interactions, no significant change in tracer dye diffusivity was observed in the presence of nanoparticles. Next, adapting tracer dyes for studies involving colloidal nanomaterials was explored. Addition of these charged tracers poses a myriad of challenges because of their propensity to disrupt the delicate balance among physicochemical interactions governing suspension stability. Here it was shown how important it is to select the compatible combinations of dye, nanoparticle, and stabilizing surfactant to overcome these limitations in low volume fraction (< 1 vol%) aqueous suspensions of Al2O3 nanoparticles. A microfluidic system was applied as a stability probe that unexpectedly revealed how rapid aggregation could be readily triggered in the presence of local chemical gradients. Suspension stability was also assessed in conjunction with coordinated measurements of zeta potential, steady shear viscosity and bulk thermal conductivity. These studies also guided our efforts to prepare new refrigerant formulations containing dispersed nanomaterials, including graphene nanosheets, carbon nanotubes and metal oxide and nitride. The influence of key parameters such as particle type, size and volume fraction on the suspension's thermal conductivity was investigated using a standard protocol. Our findings showed that thermal conductivity values of carbon nanotube and graphene nanosheet suspensions were higher than TiO2 nanoparticles, despite some nanoparticles with large particle sizes provided noticeable thermal conductivity enhancements. Significantly, the graphene containing suspensions uniquely matched the thermal conductivity enhancements attained in nanotube suspensions without accompanying viscosity, thus making them an attractive new coolant for demanding applications such as electronics and reactor cooling.
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Microfluidics. Nanofluids Heat"

1

Heat Transfer Enhancement with Nanofluids. Taylor & Francis Group, 2015.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Vafai, Kambiz, Vincenzo Bianco, Sergio Nardini, and Oronzio Manca. Heat Transfer Enhancement with Nanofluids. Taylor & Francis Group, 2017.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Microfluidics. Nanofluids Heat"

1

Zhang, Peter, and Kamran Mohseni. "Digitized Heat Transfer." In Encyclopedia of Microfluidics and Nanofluidics, 595–602. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-5491-5_1744.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ma, Hongbin. "Micro Heat Pipes." In Encyclopedia of Microfluidics and Nanofluidics, 1813–25. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-5491-5_973.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Zhang, Peter, and Kamran Mohseni. "Digitized Heat Transfer." In Encyclopedia of Microfluidics and Nanofluidics, 1–10. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-3-642-27758-0_1744-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ma, Hongbin. "Micro Heat Pipes." In Encyclopedia of Microfluidics and Nanofluidics, 1–16. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-3-642-27758-0_973-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Morini, Gian Luca. "Convective Heat Transfer in Microchannels." In Encyclopedia of Microfluidics and Nanofluidics, 491–513. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-5491-5_270.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Morini, Gian Luca. "Convective Heat Transfer in Microchannels." In Encyclopedia of Microfluidics and Nanofluidics, 1–30. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-3-642-27758-0_270-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Alihosseini, Yousef, Amir Rezazad Bari, and Mehdi Mohammadi. "Effective Parameters on Increasing Efficiency of Microscale Heat Sinks and Application of Liquid Cooling in Real Life." In Advances in Microfluidics and Nanofluids. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96467.

Full text
Abstract:
Over the past two decades, electronic technology and miniaturization of electronic devices continue to grow exponentially, and heat dissipation becomes a critical issue for electronic devices due to larger heat generation. So, the need to cool down electronic components has led to the development of multiple cooling methods and microscale heat sinks. This chapter reviewed recent advances in developing an efficient heat sink, including (1) geometry parameters, (2) flow parameters that affect the hydraulic–thermal performance of the heat sink. Also, the main goal of this chapter is to address the current gap between academic research and industry. Furthermore, commercialized electronic cooling devices for various applications are highlighted, and their operating functions are discussed, which has not been presented before.
APA, Harvard, Vancouver, ISO, and other styles
8

"Heat Capacity." In Encyclopedia of Microfluidics and Nanofluidics, 1299. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-5491-5_200095.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

"Critical Heat Flux (CHF)." In Encyclopedia of Microfluidics and Nanofluidics, 514. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-5491-5_200023.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

"Fluid Friction and Heat Transfer in Microchannels." In Microfluidics and Nanofluidics Handbook, 492–625. CRC Press, 2011. http://dx.doi.org/10.1201/b11377-18.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Microfluidics. Nanofluids Heat"

1

Leeladhar, Rajesh, Wei Xu, and Chang-Hwan Choi. "Evaporation of Nanoparticles Droplets on Nanoporous Superhydrophobic Surfaces." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10773.

Full text
Abstract:
In this paper, we experimentally studied the evaporative behavior of the nanofluid droplets (fluid containing metal nanoparticles) on nanoporous superhydrophobic surfaces. Uniformly dispersed in water, gold chloride (AuCl3) nanoparticles of varying sizes (10–250 nm) and concentrations (0.001–0.1% wt) were tested as nanofluids. Porous anodized aluminum oxide (AAO) with a pore size of 250 nm was tested as a nanoporous superhydrophobic surface, coated by a self assembled monolayer (SAM). During the evaporation in a room temperature and pressure, the evaporation kinetics (e.g., contact angle, contact diameter, and volume) of the nanofluid droplets was measured over time by using a goniometer. In the beginning, the initial droplet contact angles were significantly affected by the nanoparticle sizes and concentrations such that as the concentration increased, the initial contact angle decreased, which was more pronounced at larger particle sizes. During evaporation, despite the different particle sizes and concentrations, there were two distinct stages shown, especially for the change of contact angles, i.e., gradual decrease in the beginning, followed by rapid decrease in the end. No remarkable wetting transition from de-wetting (Cassie) to wetting (Wenzel) state was shown during the evaporation. Evaporation rate was influenced by nanoparticles such that it was significantly mitigated with the nanofluid droplet of the highest concentration (0.1% wt). The scanning electron microscope (SEM) images show that the ring-like dry-out pattern forms after the evaporation of nanofluids with lower concentrations (0.001%, 0.01% wt), whereas the one with higher concentrations (0.1%wt) forms a uniformly distributed pattern. These results demonstrate that nanoparticle sizes and concentrations make significant effects on interfacial phenomena in droplet evaporation on nanostructured surfaces, which will impact many engineering applications and system designs based on droplets such as microfluidics and heat transfer.
APA, Harvard, Vancouver, ISO, and other styles
2

Wang, Liqiu. "Research and Engineering Practice in Nanofluids: Key Issues." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-23184.

Full text
Abstract:
Nanofluids are a new class of fluids engineered by dispersing nanometer-size structures (particles, fibers, tubes, droplets) in base fluids. The very essence of nanofluids research and development is to enhance fluid macroscopic and megascale properties/performance such as thermal conductivity through manipulating microscopic physics (structures, properties and activities). Therefore, the success of nanofluid technology depends very much on how well we can address issues like effective means of microscale manipulation, interplays among physics at different scales, and optimization of microscale physics for the optimal megascale properties. In this poster we review methodologies available to effectively tackle these key but difficult problems and identify the future research needs as well. The reviewed techniques include nanofluids synthesis through liquid-phase chemical reactions in continuous-flow microfluidic microreactors, scaling-up by the volume averaging, and constructal design with the constructal theory. The identified areas of future research contain microfluidic nanofluids, thermal waves, and constructal nanofluids. While our focus is on heat-conduction nanofluids, the methodologies are equally valid for the other types of nanofluids. The review could serve as a coherent, inspiring and realistic plan for future research and development of nanofluid technology.
APA, Harvard, Vancouver, ISO, and other styles
3

Wei, 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.

Full text
Abstract:
This paper reports a new nanofluidic plasmonics-based sensing platform which can be readily integrated with microfluidics devices, and potentially enable an in-parallel transmission surface plasmon resonance (SPR), lab-on-chip sensing technology. The technology overcomes the current SPR size limitations through a combination of nanofluidics and nanoplasmonics in a rationally designed in-plane nanoslit array capable of concurrent plasmonic sensing and confined-flow for analyte delivery. This work is leveraged on our previous work of using nanoslit metal films for SPR sensing [1, 2], and the in-plane nanofluidic nanoplasmonic platform is different from recently reported nanohole-based nanofluidic plasmonics sensors [3, 4]. The work presented here includes an integrated device with nanofluidic nanoplasmonic arrays interfacing with microfluidic channels, and preliminary findings, from both theoretical and experimental fronts, of the device for bio-sensing.
APA, Harvard, Vancouver, ISO, and other styles
4

Takayama, 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.

Full text
Abstract:
Many biological studies, drug screening methods, and cellular therapies require culture and manipulation of living cells outside of their natural environment in the body. The gap between the cellular microenvironment in vivo and in vitro, however, poses challenges for obtaining physiologically relevant responses from cells used in basic biological studies or drug screens and for drawing out the maximum functional potential from cells used therapeutically. One of the reasons for this gap is because the fluidic environment of mammalian cells in vivo is microscale and dynamic whereas typical in vitro cultures are macroscopic and static. This presentation will give an overview of efforts in our laboratory to develop programmable microfluidic systems that enable spatio-temporal control of both the chemical and fluid mechanical environment of cells. The technologies and methods close the physiology gap to provide biological information otherwise unobtainable and to enhance cellular performance in therapeutic applications. Specific biomedical topics that will be discussed include subcellular signalling in normal and cancer cells, in vitro fertilization on a chip, studies of the effect of physiological and pathological fluid mechanical stresses on endothelial and epithelial cells, and microfluidic stem cell engineering. In the nanoscale regime, tunable nanochannels that can manipulate single DNA molecules will be discussed.
APA, Harvard, Vancouver, ISO, and other styles
5

Erickson, David, Sudeep Mandal, Allen Yang, Julie Goddard, and Bernardo Cordovez. "Optofluidics: Fluidics Enabling Optics and Optics Enabling Fluidics." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52025.

Full text
Abstract:
Optical devices which incorporate liquids as a fundamental part of the structure can be traced at least as far back as the 18th century where rotating pools of mercury were proposed as a simple technique to create smooth mirrors for use in reflecting telescopes. Modern microfluidic and nanofluidics has enabled the development of a present day equivalent of such devices centered on the marriage of fluidics and optics which we refer to as “Optofluidics.” In this review paper we will present an overview of our approach to the development of three different optofluidic devices. In the first of these we will demonstrate how the fusion of novel nanophotonic structures with micro- and nanofluidic networks can be used to perform ultrasensitive, label free biomolecular analysis. This will be done in the context of our newly developed devices for screening of Dengue and Influenza virus RNA. For the second class of device I will discuss and demonstrate how optical forces (scattering, adsorption and polarization) in solid and liquid core nanophotonic structures can be used to drive novel microfluidic processes. Some of the advanced analytical, numerical and experimental techniques used to investigate and design these systems will be discussed as well as issues relating to integration and their fabrication.
APA, Harvard, Vancouver, ISO, and other styles
6

Kuang, Cuifang, and Guiren Wang. "Fast Nanoscopic Velocimetry for Micro/Nanofluidics." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18514.

Full text
Abstract:
We presented two kinds of innovative velocimetry with high temporal and spatial resolution respectively based on the Laser Induced Fluorescence Photobleaching Anemometer (LIFPA) and Stimulated Emission Depletion (STED) techniques. The temporal and spatial resolution has been for the first time achieved to 5–10 μs and 70 nm, respectively. To our knowledge, the temporal resolution is about 100× better than that of the state of the art microPIV, which is currently the most widely used velocimetry in microfluidics community. And for the first time, flow velocity distribution in a nanocapillary has been measured with a spatial resolution better than 70 nm.
APA, Harvard, Vancouver, ISO, and other styles
7

Wang, L. Q. Rick. "Research and Engineering Practice in Nanofluids: Key Issues." In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2011. http://dx.doi.org/10.1115/icnmm2011-58301.

Full text
Abstract:
Unlike the past century that was blessed with ever-abundant cheap oil, this century energy has been rated as the single most important issue facing humanity. A global-scale energy crisis looms ahead. Nanotechnology will figure centrally in providing technological solutions. Nanofluid technology, one of the enabling technologies of the nanotech revolution, holds the promise of significantly enhancing the thermal properties of fluids and thus providing high quality heat-transfer fluids of the future that are vital for solving the terawatt challenge facing us. Nanofluids, fluid suspensions of nanometer-sized structures, are research challenges of rare potential but daunting difficulty. The potential comes from both scientific and practical opportunities in many fields. The difficulty reflects the issues related to multiscales. Nanofluids involve at least four relevant scales: the molecular scale, the microscale, the macroscale and the system-scale, with the microscale as the additional one at which nano structures interact with the base fluids. By their very nature, research and engineering practice in nanofluids are to optimize the microscale physics (structures, properties and activities) for the best system performance via enhanced macroscale properties through manipulating microscale physics. Therefore, interest should focus on addressing questions like: (i) how to optimize microscale physics for the optimal system performance, (ii) what is the macroscale manifestation of microscale physics, and (iii) how to effectively manipulate at microscale. In this keynote lecture, we summarize our work of addressing these key issues with powerful microfluidic technology, thermal-wave theory and constructal theory by taking heat-conduction nanofluids as the example.
APA, Harvard, Vancouver, ISO, and other styles
8

Salgado, Juan David, Keisuke Horiuchi, and Prashanta Dutta. "Development of Microfluidic Flow Sensor in a Polymeric Microchip." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56793.

Full text
Abstract:
A microfluidic flow sensor has been developed to precisely measure the flow rate in a micro/nanofluidic channel for lab-on-a-chip applications. Mixed electroosmotic and pressure driven microflows are investigated using this sensor. Our microflow sensor consists of two components: fluidic circuit and electronic circuit. The fluidic circuit is embedded into the microfluidic chip, which is formed during the microfabrication sequences. On the other hand, the electronic circuit is a microelectronic chip that works as a logical switch. We have tested the microflow sensor in a hybrid poly di-methyl-siloxane (PDMS)-glass microchip using de-ionized (DI) water. Softlithography techniques are used to form the basic microflow structure on a PDMS layer, and all sensing electrodes are deposited on a glass plate using sputtering technique. In this investigation, the microchannel thickness is varied between 3.5 and 10 microns, and the externally applied electric field is ranged between 100V/mm and 200V/mm. The thickness of the gold electrodes is kept below 100nm, and hence the flow disturbance due to the electrodes is very minimal. Fairly repeatable flow results are obtained for all the channel dimensions and electric fields. Moreover, for a particular electric field strength, there is an appreciable change in the flow velocity with the change of the channel thickness.
APA, Harvard, Vancouver, ISO, and other styles
9

Tigner, Julaunica, and Tamara Floyd-Smith. "Feasibility Assessment of the Integration of Microfluidics and NEPCM for Cooling Microelectronics Systems." 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/mnhmt2012-75107.

Full text
Abstract:
The growing demand for microelectronic systems to be smaller and faster has increased the energy released by these devices in the form of heat. Microelectronic systems such as laptop computers and hand held devices are not exempted from these demands. The primary traditional technologies currently used to remove heat generated in these devices are fins and fans. In this study, traditional methods were compared to more novel methods like cooling using forced convection in microfluidic channels and stagnant nanoparticle enhanced phase change materials (NEPCM). For this study, the difference between the surface temperature of a simulated microelectronic system without any cooling and with a particular cooling method was compared for several cooling scenarios. Higher ΔT values indicate more effective cooling. The average ΔT values for fans, fins, NEPCM and microchannels with water were 2°C, 5°C, 3°C and 4°C respectively. These results suggest that, separately, microchannel cooling and NEPCM are promising methods for managing heat in microelectronic systems. Even more interesting than NEPCM or microchannel cooling alone is the potential cooling that can be achieved by combining the two methods to achieve multimode cooling first by the phase change of the NEPCM and then by circulating the nanofluid (melted NEPCM) through microchannels. A feasibility assessment, however, reveals that the combination of the two methods is not equal to the sum of the parts due to the viscosity and associated pumping power requirements for the melted phase change material. Nonetheless, the combination of the method still holds promise as a competitive alternative to existing thermal management solutions.
APA, Harvard, Vancouver, ISO, and other styles
10

Moon, Hyejin, Shreyas Bindiganavale, Yasith Nanayakkara, and Daniel W. Armstrong. "Digital Microfluidic Device Using Ionic Liquids for Electronic Hotspot Cooling." In ASME 2009 7th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2009. http://dx.doi.org/10.1115/icnmm2009-82264.

Full text
Abstract:
Thermal management in electronics become more challenging as the size of electronics decreases, yet, the heat generated from electronics still increases. To enhance cooling efficiency of conventional cooling schemes such as heat pipes, we experimentally present a use of electrowetting on dielectric (EWOD) digital microfluidic technique to force the cooling liquid medium to move to hot spot area. In this paper, firstly, two different EWOD devices were compared in their cooling performance. One is a system using one plane device and sessile droplet of cooling medium and the other is a system using two parallel planes and liquid is sandwiched in between. Secondly, two types of liquids were used and compared as the cooling medium. De-ionized (DI) water and room temperature ionic liquid (RTIL) have been investigated. RTILs are thermally stable thanks to their low vapor pressure. In addition to thermal stability, RTIL can be tailored task specifically by altering cations and anions. Different experiments were conducted to study the capacity of IL’s to change the surface temperature of the hotspot generated and this was compared with that of DI water. The latter showed higher capacity to remove heat, while evaporation problem was predominant in the sandwiched setup. Three different ionic liquids, 1-butyl-3-methylimidazolium chloride or [BMIM]Cl, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)-imide or [BMIM]Ntf2, and [CMIM]FeCl4 showed less effect on changing the surface temperature compared to water. It is due to generally lower heat conductivity and higher viscosity of ILs than water. However, RTILs showed high thermal stability by resulting in no evaporation during cooling process while water had vigorous evaporation. Nanofluid of RTIL and multiwall carbon nanotubes (MWCNT) mixture has been tested as the first step toward enhancing thermal conductivity of RTIL.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Microfluidics. Nanofluids Heat' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography