Applied Physics Letters · 2008 · 59 citations · 13 references
Materials ScienceRheological MeasurementEngineeringPolymer SolutionNanofluid ShearFluid MechanicsMechanical EngineeringPolymer ScienceRheological PropertyDilute Nanoparticle SuspensionsMicroemulsionNanofluidicsRheologyLongitudinal ViscosityMultiphase FlowSoft MatterIsoparaffinic Polyalphaolefin
Dilute nanoparticle suspensions of alumina in decane and isoparaffinic polyalphaolefin (PAO) exhibit thermal conductivity and shear viscosity that are enhanced compared to continuum models that assume well-dispersed particles. An optical technique has been used to measure the longitudinal viscosity of these suspensions at frequencies from 200to600MHz and evaluate an effective hydrodynamic particle size. The measurements indicate that for the decane-based nanofluids the nanoparticles do not form clusters. In the case of PAO nanofluids, the measurements of longitudinal viscosity and the corresponding values of the particle size are consistent with a picture of nonclustered particles in a weakly shear-thinning viscous oligomeric oil.
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Measurements of nanofluid viscosity and its implications for thermal applications
Ravi Prasher, David Song, Jinlin Wang et al. · Applied Physics Letters · 2006 · 792 citations