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Alternative Calorimetry Based on the Photothermoelectric (PTE) Effect Application to Magnetic Nanofluids

Abstract : Photothermoelectric (PTE) calorimetry was applied for the first time for thermal characterization of liquids. Both back and front detection configurations, together with the thermal-wave resonator cavity (TWRC) scanning procedure, have been used in order to measure the thermal diffusivity and thermal effusivity of a particular magnetic nanofluid carrier liquid—transformer oil, surfactant—oleic acid, nanoparticles’ type—$$\hbox {Fe}_{3}\hbox {O}_{4}$$Fe3O4.The investigations were performed as a function of the nanoparticles’ concentration. Small increases of thermal diffusivity (from $$9.06\times 10^{-8}\,\hbox {m}^{2}{\cdot } \hbox {s}^{-1}$$9.06×10-8m2·s-1 up to $$9.84\times 10^{-8}\,\hbox {m}^{2}{\cdot } \hbox {s}^{-1})$$9.84×10-8m2·s-1) and thermal effusivity (from $$450\,\hbox {W}{\cdot } \hbox {s}^{1/2}{\cdot } \hbox {m}^{-2}{\cdot } \hbox {K}^{-1}$$450W·s1/2·m-2·K-1 up to $$520\,\hbox {W}{\cdot } \hbox {s}^{1/2}{\cdot } \hbox {m}^{-2}{\cdot } \hbox {K}^{-1})$$520W·s1/2·m-2·K-1) with increasing concentration of $$\hbox {Fe}_{3}\hbox {O}_{4}$$Fe3O4 nanoparticles (from 0 up to 0.623 mg $$\hbox {Fe}_{3}\hbox {O}_{4}/\hbox {ml}$$Fe3O4/ml fluid) were observed. The comparison with the photopyroelectric (PPE) method shows that PTE and PPE give similar results but, for the moment, PPE is more accurate. © 2015, Springer Science+Business Media New York.
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Submitted on : Monday, July 15, 2019 - 6:07:17 PM
Last modification on : Tuesday, July 16, 2019 - 1:28:02 AM

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D. Dadarlat, P.R.N. Misse, A. Maignan, E. Guilmeau, R. Turcu, et al.. Alternative Calorimetry Based on the Photothermoelectric (PTE) Effect Application to Magnetic Nanofluids. International Journal of Thermophysics, 2015, 36 (9), pp.2441-2451. ⟨10.1007/s10765-015-1855-x⟩. ⟨hal-02184190⟩

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