nanofluids – Page 2 – TechConnect Briefs

Thermal Performance of Silver/Water Nanofluids in Heat Exchangers

Bandarra Filho E.P., Oliveira G.A., Federal University of Uberlandia, BR

Nanofluids are fluid formed by dispersing solid particles of size ranging 1-100 nm (nanoparticles) in a given base fluid such as water or oil, for example. Regarding to the thermal potential, the researches on nanofluids [...]

Nanocarbon Nanofluids: Comparisons Between Morphology and Nanostructure

Vander Wal R.L., The Pennsylvania State University, US

Reported here are experimental results of studies designed to identify the operable mechanisms responsible for the gains in thermal conductivity of nanoﬂuids based on nanocarbons. Comparison of functionalized versus nonfunctionalized nanocarbons addresses the effect of [...]

Effective Viscosity of the nanofluids: Experimental studying and molecular dynamics simulation

Rudyak V.Ya., Dimov S.V., Krasnolutsky S.L., Ivanov D.A., Novosibirsk State University of Architecture & Civil Engineering, RU

The studying the effective viscosity coefficient of the nanofluids is the object of present paper. Experimentally the viscosity of the nanofluids on basis of ethylene glycol and SiO2 nanoparticles was studied. It was shown that [...]

Influence of molecular weight of PVP on aggregation and thermal diffusivity of silver-based nanofluids

Agresti F., Barison S., Battiston S., Pagura C., Colla L., Fedele L., Fabrizio M., National Research Council of Italy (CNR), IT

With the aim of preparing stable nanofluids for heat exchange applications and to study the effect of surfactant on the aggregation of nanoparticles and thermal diffusivity, stable silver colloids were synthesized in water by a [...]

Efficiency of a Flat-plate Solar Collector with Water-based MWCNT Nanofluids

Lee S-H., Jang S.P., Korea Aerospace University, KR

In this paper, the efficiency of nanofluid-based flat-plate solar collector is analytically evaluated by use of the extinction coefficient of nanofluids. The water-based multi wall carbon nanotube (MWCNT) nanofluids and water-based Ag nanofluids are selected [...]

Comparison and Critical Analysis of Experimental Results and Correlations for Thermal Conductivity of Nanofluids

Bandarra Filho E.P., Oliveira G.A., Wen D., Federal University of Uberlandia, BR

Suspensions of nanoparticles in liquids, known recently as “nanofluids,” have generated considerable interest for their potential to enhance the heat transfer in thermal systems, and reduce the possibility of erosion, sedimentation and clogging that plagued [...]

Scalable gas phase nanoparticle treatment methods required for large-scale nanofluid and nanocomposite synthesis

Dion C.A.D., Tavares J.R., École Polytechnique de Montréal, CA

Recent work has demonstrated that while nanofluids do indeed exhibit increased heat transfer properties , there is no abnormal enhancement as had been claimed by early proponents of nanofluids. However, this lack of abnormal enhancement [...]

Critical heat flux (CHF) enhancement of the nanofluids by the electrical explosion of a wire in liquids

Park E., Park H., Bang I., Park E., Park H., Ulsan National Institute of Science and Technology(UNIST), KR

Nanofluids, dispersed nanoparticles in base fluid, have been drawing the attention as heat transfer fluid for enhancement of critical heat flux (CHF). The enhancement of CHF contributes to increase the safety margin of thermal system. [...]

Heat transfer behaviour of Nanofluids

Nayak A.K., Kulkarni P.P., Singh R.K., Vijayan P.K., Bhabha Atomic Research Centre, IN

Nanofluids are stable colloidal suspensions of nanoparticles, nanofibers, or nanocomposites in common base fluids, These nanofluids can possess properties that are substantially different from their parent materials. Study on nanofluids heat transfer is rather a [...]

Analytical investigation of nanofluids dispersion stability

Farzaneh H., Behzadmehr A., Samimi A., University of Sistan and Baluchestan, IR

Experimental and numerical investigations on nanofluids flows at different geometrical configurations and different thermo-fluid conditions show a significant enhancement on the convective heat transfer while the pumping power cost remains reasonable. However, many problems such [...]