Abstract
Magnetic fluids are suspensions of ultra fine (5 to 15nm) particles coated with a molecular layer of dispersant in a liquid carrier such as water or kerosene. In this paper micro visualization of thermal behavior of ferromagnetic particles in magnetic fluids was investigated using an optical microscope system and Particle Image Velocimetry (PTV) data processing system. Real-time visualization of the Brownian motion and the chain-like cluster formation of two types of particles were carried out under non magnetic field and a magnetic field. The influence of the temperature variation on Brownian motion of ferromagnetic particles was investigated.
