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Keywords: viscosity
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Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Heat Mass Transfer. March 2014, 136(3): 034501.
Paper No: HT-13-1222
Published Online: November 21, 2013
... the thermal conductivity enhancements but are qualitatively consistent with their shape dependence. As a penalty, however, the presence of Ag NWs was shown to give rise to significant increase in the viscosity of the EG-based suspensions. ethylene glycol suspensions nanofluids silver nanoparticles...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. May 2012, 134(5): 051025.
Published Online: April 13, 2012
... the optical force indicates a nonlinear increase as the laser power increases. This enhancement mainly attributes to the temperature-sensitive change of liquid viscosity resulting in a reduction of viscous drag for migrating particles. An appropriate arrangement of light absorption leads to an enhancement...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. April 2012, 134(4): 042501.
Published Online: February 15, 2012
... are the nanofluid effective properties calculated at the reference temperature. In this connection, two empirical equations, based on a wide variety of experimental data reported in the literature, are used for the evaluation of the nanofluid effective thermal conductivity and dynamic viscosity. Conversely...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Heat Transfer In Nanochannels, Microchannels, And Minichannels
J. Heat Mass Transfer. February 2012, 134(2): 020908.
Published Online: December 19, 2011
... = dynamic viscosity, Pa s ρ = density, kg m −3 σ T = thermal accommodation coefficient, dimensionless σ u = tangential momentum accommodation coefficient, dimensionless ξ * = coefficient of slip, dimensionless ς * = temperature...
Journal Articles
Publisher: ASME
Article Type: Heat Transfer In Nanochannels, Microchannels, And Minichannels
J. Heat Mass Transfer. February 2012, 134(2): 020907.
Published Online: December 19, 2011
... it re-enters the cooling channels. The suspensions showed Newtonian behavior in the viscosity measurement. The actual pressure drop determined in the experiments is smaller than the pressure drop estimation based on the measured viscosities. The difference between the two values increases...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. January 2012, 134(1): 012501.
Published Online: October 28, 2011
...I. S. Shivakumara; Jinho Lee; C. E. Nanjundappa The onset of thermogravitational convection in a horizontal ferrofluid layer is investigated with viscosity depending exponentially on temperature. The bounding surfaces of the ferrofluid layer are considered to be either stress free or rigid...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. December 2011, 133(12): 122602.
Published Online: October 7, 2011
... equations rotational flow slip flow viscosity exact solution rotating disk flow partial slip vorticity suction and blowing layer thicknesses shear stresses The cases when an exact solution for the Navier–Stokes equation can be obtained are of particular importance in investigations...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. December 2011, 133(12): 122504.
Published Online: October 6, 2011
.... The results are shown over a wide range of Grashof numbers, volume fractions of nanoparticles, and aspect ratios. The Nusselt number is demonstrated to be sensitive to the aspect ratio. It is found that the Nusselt number is more sensitive to thermal conductivity than viscosity at a low velocity (especially...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. December 2011, 133(12): 121701.
Published Online: October 6, 2011
... nm are prepared, stabilized, and characterized by standard methods. The thermal conductivity and viscosity used in the study were measured and analyzed. The base fluids used are water and ethylene glycol. The effect of volume fraction, channel size, particle size, and base fluids are presented...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. November 2011, 133(11): 111703.
Published Online: September 20, 2011
... 09 2011 compressible flow flow simulation heat transfer microfluidics numerical analysis pipe flow slip flow viscosity microtube compressibility viscous heating temperature field High efficiency heat exchangers are needed for the cooling of electronic systems...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. September 2011, 133(9): 092502.
Published Online: August 1, 2011
...Amir Keshmiri The present work is concerned with the modeling of buoyancy-modified mixed convection flows, such flows being representative of low-flow-rate flows in the cores of Gas-cooled Reactors. Three different eddy viscosity models (EVMs) are examined using the in-house code, “ CONVERT. ” All...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. September 2011, 133(9): 092501.
Published Online: July 27, 2011
.... 2 . It is observed that as Pr increases, the temperature decreases and a further increase makes the temperature to tend to zero. This is because fluids with high Pr have a small thermal conductivity and high viscosity, which normally result into low heat penetration and a reduced thermal layer...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. August 2011, 133(8): 081801.
Published Online: May 2, 2011
.... In addition, two temperature dependent models for the thermal conductivity and viscosity of nanofluids that account for the fundamental role of Brownian motion are used. Calculated results demonstrate that the effectiveness and performance index of CFMCHE decrease with increasing Reynolds number. Moreover...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. August 2011, 133(8): 081701.
Published Online: April 26, 2011
... a two-layer eddy viscosity model developed by Cebeci and Smith, and the turbulent Prandtl number formulation originally developed by Kays and Crawford. The governing differential equations are discretized with the Keller-box method. The numerical accuracy is validated through grid-independence studies...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. May 2011, 133(5): 051401.
Published Online: February 4, 2011
... to 31 vol % . We determined the particle morphology by transmission electron microscope imaging and its dispersion status by dynamic light scattering measurements. The thermophysical properties of the fluids, namely, their specific heat, density, thermal conductivity, and dynamic viscosity were...