Investigation of the dynamic behavior of a liquid droplet placed on a vibrating perforated surface via the piezoelectric effect

The thesis study focuses on the dynamic behavior of water droplets placed on surfaces of brass and stainless steel materials that vibrate at high frequencies through the piezoelectric effect. The purpose of this thesis study is to investigate the dynamic behavior of water droplets of specific volumes placed on the surfaces of porous and nonporous brass and stainless steel plates. Additionally, the study aims to examine the effects of the material properties of brass and stainless steel, as well as the spacing between pores in the porous plates, on droplet atomization behavior. To achieve this goal, brass and stainless steel plates were perforated using laser marking methods, with pores spaced at distances of 1000, 1500, 2000 and 2500 μm on the same plate. The actual diameters of the pores in the porous brass and stainless steel plates were measured under a microscope. For the droplet atomization experiments, a piezoelectric disk was attached to the underside of the test plates and stimulated with a sinusoidal signal. The topview images of the water droplet in contact with the plate surface were recorded using a camera. The recorded images were analyzed over time using image analysis software to track changes in the droplet's behavior. The software was also used to measure the droplets' area over time, and graphical representations of this data were created. This study demonstrates the dynamic behavior of water droplets on surfaces of brass and stainless steel, both porous and non-porous, with varying pore spacings. The impact of altering the spacing between pores in the porous plates on droplet atomization was examined. The overall findings suggest that brass materials exhibit faster droplet atomization compared to stainless steel materials. Keywords: Vibration Analysis, Atomization, Micro Perforated Square Brass Plate, Micro Perforated Square Stainless Steel Plate, Non-Perforated Micro Thickness Plate, Image Analysis, Piezoelectric Transducer