Enhancing thermal conductivity of fluids with nano-particles
01 Jan 1995-Vol. 231, pp 99-105
About: The article was published on 1995-01-01 and is currently open access. It has received 7263 citations till now. The article focuses on the topics: Thermal conductivity & Nanoparticle.
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TL;DR: In this article, the potential of using carbon nanotube (CNT)-glycol nanosuspension as such a medium, prepared by freeze drying-ultrasonic dispersing after oxidation treatment with HNO3, was investigated.
75 citations
TL;DR: In this paper, the authors measured the dielectric breakdown voltage of transformer oil-based nanofluids in accordance with IEC 156 standard and investigated the breakdown performance with the application of an external magnetic field and different volume concentrations of magnetic nanoparticles.
75 citations
TL;DR: In this article, the authors carried out extensive experimental studies of turbulent convective heat transfer of several water-based Al2O3, SiO2, and MgO nanofluids with a nanoparticle volume fraction up to 4%.
75 citations
TL;DR: In this article, the authors studied the flow and heat transfer of the power-law nanofluid thin film due to a stretching sheet with magnetic field and velocity slip effects, and the governing equations were solved by using DTM-NIM which is combined the differential transform method (DTM) with Newton Iteration method (NIM).
Abstract: This paper studies the flow and heat transfer of the power-law nanofluid thin film due to a stretching sheet with magnetic field and velocity slip effects. Unlike classical work, Fourier's law is modified by assuming that the thermal conductivity is power-law-dependent on the velocity gradient. Meanwhile, the power law wall temperature and the power law velocity slip effects are taken into account. Three different types of nanoparticles, Al 2 O 3 , TiO 2 and CuO are considered with ethylene vinyl acetate copolymer (EVA) used as a base fluid. The governing equations are solved by using DTM–NIM which is combined the differential transform method (DTM) with Newton Iteration method (NIM). The results show that for the specific physical parameters, the two different velocity profiles have always an intersection which goes from a far-field region to the stretching sheet as increasing velocity slip parameter. Furthermore, CuO–EVA nanofluid has better enhancement on heat transfer than TiO 2 /Al 2 O 3 –EVA.
75 citations
TL;DR: In this paper, aqueous CaCO3 paste was prepared by dispensing a quaternions into distilled water under ultrasonic vibration and thermal conductivity and rheological behavior of the nanofluids were measured by standard analyzers.
Abstract: CaCO3 aqueous nanofluids were prepared by dispensing aqueous CaCO3 paste into distilled water under ultrasonic vibration. The actual microstructures of the CaCO3 nanofluids with different particle volume fractions were characterized by freeze etching replication transmission electron microscopy (FERTEM). Thermal conductivity and rheological behavior of the nanofluids were measured by standard analyzers. The results show that CaCO3 paste as raw material for nanofluids is advantageous to reducing aggregation of primary nanoparticles. The effective viscosities and effective thermal conductivities of the CaCO3 nanofluids are related to the aggregates of nanoparticles and can be well predicted by the modified Krieger & Dougherty formula and the modified Hamilton & Crosser model, respectively.
75 citations