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Keywords: alumina
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Journal Articles
Article Type: Research-Article
J. Heat Transfer. May 2014, 136(5): 051702.
Paper No: HT-12-1663
Published Online: February 26, 2014
...Javier A. Narvaez; Aaron R. Veydt; Robert J. Wilkens Experimental results for the overall heat transfer coefficient (Eq. (13) ) obtained using DI water and the alumina/DI water nanofluids are compared to the expected values (Eq. (14) ). This comparison is shown in Fig. 14 . Nomenclature...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. December 2011, 133(12): 121701.
Published Online: October 6, 2011
... 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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. August 2011, 133(8): 081801.
Published Online: May 2, 2011
... alumina Brownian motion copper compounds flow simulation heat exchangers heat transfer microchannel flow nanofluidics thermal conductivity viscosity water 25 07 2010 14 12 2010 02 05 2011 02 05 2011 The numerical analysis was performed for the counterflow...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. May 2011, 133(5): 054503.
Published Online: February 2, 2011
...) 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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. May 2011, 133(5): 052401.
Published Online: February 1, 2011
... 2010 01 02 2011 01 02 2011 alumina aluminium convection copper copper compounds gold liquid theory nanofluidics nickel organic compounds thermal conductivity titanium compounds viscosity water nanofluid convective heat transfer coefficient thermal conductivity...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. May 2011, 133(5): 051501.
Published Online: January 31, 2011
.... 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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. March 2011, 133(3): 031009.
Published Online: November 16, 2010
... 2010 16 11 2010 16 11 2010 alumina colloids cooling flow measurement forced convection laminar to turbulent transitions microchannel flow nanoparticles two-phase flow water nanofluids heat transfer pressure drop turbulence transition Nanofluids are engineered...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. March 2011, 133(3): 031002.
Published Online: November 15, 2010
... 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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. October 2010, 132(10): 102404.
Published Online: July 29, 2010
...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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. July 2010, 132(7): 072701.
Published Online: April 22, 2010
..., 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. Figures 5c 5d illustrate that processing time for LIII and LIV...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. June 2010, 132(6): 061501.
Published Online: March 25, 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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. June 2010, 132(6): 062501.
Published Online: March 24, 2010
... for Ra = 10 4 and at θ = 30 deg for Ra = 10 5 and 10 6 . 25 03 2009 09 10 2009 24 03 2010 24 03 2010 alumina computational fluid dynamics confined flow copper copper compounds differential equations integration nanofluidics nanoparticles natural convection particle...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. June 2010, 132(6): 062401.
Published Online: March 24, 2010
... ) 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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. November 2009, 131(11): 112401.
Published Online: August 19, 2009
.... 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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. July 2009, 131(7): 071601.
Published Online: May 6, 2009
... two nanofluids, namely, an increase in the specific heat with an increase in temperature and a decrease in the specific heat with an increase in particle volumetric concentration. 31 05 2008 23 12 2008 06 05 2009 alumina heat transfer nanofluidics nanoparticles silicon...
Journal Articles
Article Type: Micro/Nanoscale Heat Transfer—Part Ii
J. Heat Transfer. April 2009, 131(4): 043204.
Published Online: February 13, 2009
...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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. April 2008, 130(4): 042412.
Published Online: March 21, 2008
...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...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. April 2008, 130(4): 044501.
Published Online: March 18, 2008
... 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...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. March 2008, 130(3): 034504.
Published Online: March 6, 2008
... ° 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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. February 2008, 130(2): 022401.
Published Online: February 4, 2008
... to the surface, respectively. These spot characteristics result in less than 1% error due to misalignment of the beams ( 29 ). 24 07 2006 14 06 2007 04 02 2008 alumina aluminium chromium dielectric materials interface phonons micromechanical devices phonon-phonon interactions...