Evaluation of the effective thermal conductivity of composite polymers by considering the filler size distribution law

Holotescu, Sorin; Stoian, Floriana D.

doi:10.1631/jzus.a0820733

Cited by 18 publications

(22 citation statements)

References 21 publications

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“…This phenomenon is explained by the very low efficiency of heat transfer between particles and matrix, so that the higher thermal conductivity of the filler cannot be taken into advantage and the composite behaves like a hollow material, thus reducing its conductivity compared to the dense reference matrix. Evaluation of the effective thermal conductivity of composite polymers by considering the filler size distribution law was investigated by Holotescu et al (Holotescu et al, 2009). …”

Section: Modeling Of Thermal Conductivity In Compositesmentioning

confidence: 99%

Thermal Conductivity of Nanoparticles Filled Polymers

Ebadi‐Dehaghani¹,

Nazempour²

2012

Smart Nanoparticles Technology

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Section: Modeling Of Thermal Conductivity In Compositesmentioning

confidence: 99%

Thermal Conductivity of Nanoparticles Filled Polymers

Ebadi‐Dehaghani¹,

Nazempour²

2012

Smart Nanoparticles Technology

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“…The Holotescu-Stoian model, developed initially for the solid matrix-solid filler mixture and presented in Refs. [55,56], introduced for the first time the filler particle size distribution in the Maxwell model. The expression for the effective thermal conductivity of the Holotescu-Stoian model, rel.…”

Section: Thermal Conductivitymentioning

confidence: 99%

Nanofluid with Colloidal Magnetic Fe3O4 Nanoparticles and Its Applications in Electrical Engineering

Pîslaru‐Dănescu¹,

Ţelipan²,

Stoian³

et al. 2017

Nanofluid Heat and Mass Transfer in Engineering Problems

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In this study, we propose a new type of a cooling agent based on magnetic nanofluid for the purpose of replacing the classical cooling fluids in electrical power transformers. The magnetite (Fe 3 O 4 ) nanoparticles were synthesized by the co-precipitation method from an aqueous medium of salts FeCl 3 x6H 2 O and FeSO 4 x7H 2 O in the molar ratio Fe 3+ /Fe 2+ = 2:1, by alkalization with 10% aqueous solution of NaOH at 80°C, for 1 h. The size of the magnetite nanoparticles, as measured by X-ray diffraction method, was 14 nm and by scanning electron microscopy (SEM), they are between 10 and 30 nm. Magnetite powder was placed in oleic acid as a surfactant to prevent agglomeration of nanoparticles. The resulting mixture was dispersed in transformer oil UTR 40, with the role of carrier liquid. The magnetic, rheological, thermal and electrical characteristic properties of the obtained Fe 3 O 4 transformer oil-based nanofluid were determined. A mathematical model and numerical simulation results are very useful for investigating the heat transfer performances of the magnetic nanofluid. Based on this study, it was tested the cooling performance of this magnetic nanofluid for two types of electrical power transformers as compared to classical methods. We also presented a microactuator based on the same magnetic nanofluid.

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“…thermal diffusivity and specific heat found to be decreased with increase in fibre content; however, there is no appreciable change in thermal conductivity as well as thermal diffusivity in the specified temperature range. Holotescu et al [12] presented an empirical model for the effective thermal conductivity of a polymer composite that includes dependency on the filler size distribution. The validation of new model and its characteristic equation was carried out using experimental data from the reference.…”

Section: Review Of Literaturementioning

confidence: 99%