Numerical study of TiO2-based nanofluids flow in microchannel heat sinks: Effect of the Reynolds number and the microchannel height

Numerical study of TiO2-based nanofluids flow in microchannel heat sinks: Effect of the Reynolds number and the microchannel height

•Effect of temperature and TiO2 wt% on thermal conductivity and viscosity was tested.•Both properties variation with temperature and TiO2 wt% concentration was modeled.•Laminar flow of nanofluids in microchannels heat sink was computationally simulated.•Nanofluids are more effective at low Reynolds...

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Veröffentlicht in:Applied thermal engineering 2019-10, Vol.161, p.114130, Article 114130
Hauptverfasser: Martínez, Víctor A., Vasco, Diego A., García-Herrera, Claudio M., Ortega-Aguilera, Roberto
Format: Artikel
Sprache:eng
Schlagworte:
Coefficient of friction
Computational fluid dynamics
Convective heat transfer
Finite volume method
Fluid flow
Fluid mechanics
Friction factor
Heat sinks
Heat transfer
Heat transfer coefficients
Microchannel heat sink
Microchannels
Nanofluids
Nanoparticles
Numerical analysis
Reynolds number
Skin friction
Thermal conductivity
Three dimensional flow
Titanium dioxide
Transport equations
Viscosity
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Zusammenfassung:•Effect of temperature and TiO2 wt% on thermal conductivity and viscosity was tested.•Both properties variation with temperature and TiO2 wt% concentration was modeled.•Laminar flow of nanofluids in microchannels heat sink was computationally simulated.•Nanofluids are more effective at low Reynolds numbers in microchannel heat sinks.•Effect of the temperature-dependent properties is evident near to the heated wall. In the present work, we have studied the laminar (200 ⩽ Re ⩽ 1200) three-dimensional flow of a water-based nanofluid in rectangular microchannels of constant wide cross section (283 μm) and three different heights (800 μm, 600 μm, and 400 μm). Moreover, we analyse the concentration of dispersed TiO2 nanoparticles (
ISSN:1359-4311
1873-5606
DOI:10.1016/j.applthermaleng.2019.114130