Journal Title
Title of Journal: Int J Thermophys
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Abbravation: International Journal of Thermophysics
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Authors: D Dadarlat S Longuemart R Turcu M Streza L Vekas A Hadj Sahraoui
Publish Date: 2013/12/18
Volume: 35, Issue: 11, Pages: 2032-2043
Abstract
Five types of magnetic nanofluids based on hbox Fe 3hbox O 4 nanoparticles with water as the carrier liquid were investigated by using the two photopyroelectric PPE detection configurations back BPPE and front FPPE together with the thermalwave resonator cavity TWRC technique as the scanning procedure The difference between the nanofluids was the type of surfactant double layers of lauric LA–LA oleic OA–OA and miristic MA–MA acids and also double layers of lauric–miristic LA–MA and palmiticoleic PA–OA fatty acids were used In both detection configurations the information was contained in the phase of the PPE signal The thermal diffusivity of nanofluids was obtained in the BPPE configuration from the scan of the phase of the signal as a function of the liquid’s thickness Using the same scanning procedure in the FPPE configuration the thermal effusivity was directly measured The influence of a 012 kG magnetic field on the thermal effusivity and thermal diffusivity was also investigated Because of different surfactants the thermal effusivity of the investigated nanofluids ranges from 1530hbox Wcdot hbox s1/2 cdot hbox m2cdot hbox K1 to 1790hbox Wcdot hbox s1/2cdot hbox m2cdot hbox K1 and the thermal diffusivity from 1454~times ~108hbox m2cdot hbox s1 to 1479~times ~108hbox m2cdot hbox s1 The magnetic field has practically no influence on the thermal effusivity and produces a maximum increase of the thermal diffusivity LA–LA surfactant of about 4 The authors acknowledge the financial support of the Ministry of Education Research and Youth of Romania through the National Research Program PNIIIDPCE201130036 and PNII189/2012 The waterbased magnetic nanofluids investigated have been prepared at the Lab Magnetic Fluids Timisoara by Alina Moaca PhD student while the magnetostatic VSM and dynamical light scattering characterization of samples was performed by Oana Marinica PhD student and Camelia Daia MD
Keywords:
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- Path-Integral Calculation of Cross Second Virial Coefficients for Hydrogen Isotopologues
- Measurements and Correlations of cis -1,3,3,3-Tetrafluoroprop-1-ene (R1234ze(Z)) Subcooled Liquid Density and Vapor-Phase PvT
- Comments on “The Apparent Thermal Conductivity of Liquids Containing Solid Particles of Nanometer Dimensions: A Critique” (Int. J. Thermophys. 36, 1367 (2015))
- Study on Reducing the Size-of-Source Effect of Pyrometers
- Radiative Properties of Gold Surfaces with One-Dimensional Microscale Gaussian Random Roughness
- Measurements of the Liquid Viscosities of Mixtures of n -Butane, n -Hexane, and n -Octane with Squalane to 30 MPa
- Development and Applications of Continuous-Wave Cavity Ring-Down Spectroscopy
- Correlation and Prediction of Dense Fluid Transport Coefficients. IX. Ionic Liquids
- Viscosity of nonelectrolyte liquid mixtures. III Binary mixtures of methyl methacrylate with hydrocarbons, haloalkanes, and alkylamines
- Thermal Radiation Phenomena of Surfaces of Chromium and Palladium in a High-Temperature Environment
- Comsol Simulations as a Tool in Validating a Measurement Chamber
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- A Study of Some Thermophysical Parameters in Glassy $$\mathrm{{Se}}_{80}\mathrm{{Te}}_{20}$$ and $$\mathrm{{Se}}_{80}\mathrm{{Te}}_{10}\mathrm{{M}}_{10}$$Se80Te10M10 (Cd, In, and Sb) Alloys
- Spectral Emissivity of Surface Blackbody Calibrators
- Thermophysical Properties of Low-Density Pure Alkanes and Their Binary Mixtures Calculated by Means of an ( n -6) Lennard-Jones Temperature-Dependent Potential
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- A Study of the Flow through Capillary Tubes Tuned for a Cooling Circuit with Saturated Fluorocarbon Refrigerants
- A Study of the Metal Carbide-Carbon Peritectic Phase Transition for the Cr-C System
- Thermal Changes of Maize Seed by Laser Irradiation
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- Absorption and Scattering Behavior of Nanofluids in the Visible Range
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- Tight-Binding Investigation of Thermal Conductivity of Graphene and Few-Layer Graphene Systems
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- Defect Characterization from Lock-in Vibrothermography Data
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- The Experimental Study of Temperature Dependence of Binary Diffusion Coefficients of Gases at Different Pressures
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