Evaluation of thermoacoustics parameters of CoFe 2 O 4 –ethylene glycol nanofluid using ultrasonic velocity technique
作者： Prashant B. Kharat , Apparao R. Chavan , Ashok V. Humbe , K. M. Jadhav
DOI: 10.1007/S10854-018-0386-1
关键词:
摘要: Chemical co-precipitation method was employed to synthesize cobalt ferrite (CoFe2O4) nanoparticles and prepare stable nanofluids. The the prepared nanofluids were characterized further for their structural, morphological, elemental, magnetic properties dispersion stability in order explore various properties. It shows CoFe2O4 of spinel structured 11 nm superparamagnetic, spherical nature. Finally, dispersed ethylene glycol nanofluid concentrations (0.2%, 0.4%, 0.6%, 0.8%, 1% by volume). showed highly more than 8 days 0.2 vol%. thermo-acoustic studies carried out at different temperatures ranging from 20 80 °C Thermo-acoustical such as ultrasonic velocity (U), acoustic impedance (Z), adiabatic compressibility (β), bulk modulus (K), attenuation (α), relaxation time (τ), intermolecular free length (Lf) estimated examined present work. elaborate deeper understanding particle–fluid, particle–particle interactions functions concentration, temperature. In addition, paper is intended formulate a relationship between concentration nanofluids, which would be great importance
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