... applications. The objective of this research is to evaluate nanofluids as potential replacement for the coolant currently used by the Air Force. Alumina/DI water nanofluids were evaluated. It was observed that at the same volumetric flow there was no significant improvement in convective heat transfer...

... diameters 218 and 303 μm are fabricated by wet etching process on silicon wafer. An experimental set-up having provision of flow in the channel and temperature measurement along with bottom wall temperature is built-up. Alumina nanofluids with concentrations of 0.25 vol. %, 0.5 vol. %, and 1 vol. % with 45...

... ,” Fifth Conference on Nanochannels, Microchannels, and Minichannles , Puebla, Mexico. 25 07 2010 14 12 2010 02 05 2011 02 05 2011 alumina Brownian motion copper compounds flow simulation heat exchangers heat transfer microchannel flow nanofluidics thermal...

...) and alumina ( Al 2 O 3 ) nanoparticles in the based fluid of water with the Prandtl number Pr = 7 to investigate the effect of the solid volume fraction parameter ϕ of the fluid and heat transfer characteristics. The skin friction coefficient, Nusselt number, and the velocity and temperature profiles...

.... , and Prasher , R. , 2009 , “ Convective Heat Transfer for Water-Based Alumina Nanofluids in a Single 1.02-mm Tube ,” ASME J. Heat Transfer 0022-1481 , 131 , p. 112401 . 10.1115/1.3133886 Jung , J. Y. , Oh , H. S. , and Kwak , H. Y. , 2009 , “ Forced Convective Heat Transfer...

.... Although the findings with water-alumina nanofluids are not encouraging with respect to heat transfer, the results extend nanofluid data to a new type of flow and may help improve our understanding of nanofluid behavior. Moreover, this work provides a basis for further work on falling-film nanofluids...

... on the flow physics of nanofluids, especially in the transition and turbulent regions. Consequently, as a heat transfer fluid, nanofluids should be used in either the laminar flow or the fully developed turbulent flow at sufficiently high Re in order to yield enhanced heat transfer performance. alumina...

... generated by volumetric heat addition in the microwave coupling region, resulting in a temperature of 6000 K. Alumina and zirconia particles of different diameters were injected into the axisymmetric laminar plasma flow at different injection velocities and locations. Additionally, noncontinuum effects...

...Saeid Vafaei; Dongsheng Wen This work investigates subcooled flow boiling of aqueous based alumina nanofluids in 510 μ m single microchannels with a focus on the effect of nanoparticles on the critical heat flux. The surface temperature distribution along the pipe, the inlet and outlet pressures...

..., whereas that is not reduced by Alumina composite. Current study recommends efficient heating methodologies for thermoplastic substances with ceramic composite to achieve a higher processing rate with uniform temperature distribution. 01 12 2008 18 11 2009 22 04 2010 22 04 2010...

...Hyungdae Kim; Ho Seon Ahn; Moo Hwan Kim The pool boiling characteristics of water-based nanofluids with alumina and titania nanoparticles of 0.01 vol % were investigated on a thermally heated disk heater at saturated temperature and atmospheric pressure. The results confirmed the findings...

... by more than 15% in water. Wen and Ding ( 13 ) studied laminar heat transfer in the entrance region of a tube flow with an alumina-water nanofluid and found that with a 1.6% solid volume fraction, the local heat transfer coefficient at the entrance region takes on a value that is 41% higher than...

... ) was used and a numerical study on laminar flow of alumina-water nanofluid through a constant wall temperature tube was performed. The effects of nonuniform distribution of particles on heat-transfer coefficient and wall shear stress are shown. Obtained results illustrate that by considering the particle...

.... Thus, thermal performance under convective heat transfer conditions becomes of primary interest. We report here the heat transfer coefficient h in both developing and fully developed regions by using water-based alumina nanofluids. Our experimental test section consists of a single 1.02-mm diameter...

... 05 2008 23 12 2008 06 05 2009 alumina heat transfer nanofluidics nanoparticles silicon compounds specific heat two-phase flow zinc compounds nanofluids specific heat two-phase mixture concentration dependence temperature dependence Nanofluids are a new class...

...Sung Joong Kim; Tom McKrell; Jacopo Buongiorno; Lin-Wen Hu It is shown that addition of alumina, zinc-oxide, and diamond particles can enhance the critical heat flux (CHF) limit of water in flow boiling. The particles used here were in the nanometer range ( < 100 nm ) and at low concentration...

...Wesley Williams; Jacopo Buongiorno; Lin-Wen Hu The turbulent convective heat transfer behavior of alumina ( Al 2 O 3 ) and zirconia ( Zr O 2 ) nanoparticle dispersions in water is investigated experimentally in a flow loop with a horizontal tube test section at various flow rates ( 9000 < Re...

... applications of nanofluids the situation of interest is flow boiling. This technical note presents first-of-a-kind data for flow boiling CHF in nanofluids. It is shown that a significant CHF enhancement (up to ∼ 30 % ) can be achieved with as little as 0.01% by volume concentration of alumina nanoparticles...

... ° C . An improved testing method was used to test the thermal conductivities of an alumina fibrous insulation at environmental pressures from 0.03 Pa to 10 5 Pa with the average temperature of the sample increased to 864 ° C and its density being 128 kg ∕ m 3 . A method based on temperature difference...

... that multiple-phonon processes are contributing to interfacial transport at high temperatures. 24 07 2006 14 06 2007 04 02 2008 alumina aluminium chromium dielectric materials interface phonons micromechanical devices phonon-phonon interactions platinum silicon thermal...