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AMMAR BIN YOUSAF,Muhammad Imran,MAJID KHAN,Muhammad Usman,MUHAMMAD ASGHAR JAMAL 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.8
The infuence of particle size on density, ultrasonic velocity and viscosity of magnetite nanofuids have been determined at (298.15 K, 303.15 K, 308.15 K and 313.15 K). Two diferent sized nanoparticles (commercially procured D=20–30 nm and synthesized D=9± 3 nm in the laboratory by co-precipitation method) were dispersed in a citric acid base fuid. The desired parameters have been experimentally determined by loading diferent concentrations of nanoparticles. It has been found that the infuence of particle size and temperature on measured physical parameters (density, ultrasonic velocity and viscosity) is not negligible and can also be taken into account in any practical application. The analyzed physical parameters can describe qualitatively and quantitatively the particle size distribution of nanofuids at a specifc temperature. Results are interpreted in terms of particle–particle and particle–fuid interactions.