Single Droplet Impingment: Effect of Nanoparticles

This study focuses on the dynamics of water and nanofluids droplet surface impingement. Droplets are generated by a piezoelectric driven droplet generator. A high-speed-high-resolution camera is used to record droplets impacting on a smooth heated silicon surface. Droplet impact velocity, spreading diameter, spreading height and dynamic contact angle are measured by image processing. Results of water and nanofluids are compared to determine effects of nanoparticles on spreading dynamics. It is concluded that the nanofluids result in larger spreading rates, larger spreading diameters and an increase in early stage dynamic contact angle.