Research Experiences

1. Characterization of the bulk nanobubbles

• Utilized ultrasonic cavitation method to generate the bulk nanobubbles.

• The pH, type, and concentration of the surfactant were changed in the solution where the nanobubbles were generated.

• The size, zeta potential, concentration, and stability of the nanobubbles were investigated by experimental instruments (NTA, Zetasizer) and theoretical approaches (DLVO theory).

2. Verification of the cyanobacterial removal by ionic nanobubbles

• Two types of cyanobacteria (Microcystis aeruginosa and Dolichospermum) were used to assess the anti-cyanobacterial capability of ionic nanobubbles.

• Microscopy(Optical and fluorescent microscope and SEM) and spectroscopy (UV-vis spectrophotometer) were utilized to investigate the cyanobacteria inactivation quantitatively.

3. Development of a device to regulate the cyanobacteria concentration

• Developed a device that can regulate the cyanobacteria concentration in fresh water.

• The device consists of ultrasonic transducers, a control box, a generator, a motor, etc.

• Assessed the performance of the device in a real lake.

• Fabricated drag-reducing surfaces by using polymeric materials with different surface wettability.

• A CO2 laser system was used to engrave the pillar pattern with different solid fractions.

• A rotational rheometer was utilized to measure the slip length of the surfaces.

• Modified theoretical equations from prior research to predict the slip lenth effectively.

• Fabricated a small (1 mm x 1 mm) intravascular ultrasound transducer for sonothrombolysis.

• Used nanobubbles to enhance the efficiency of the sonotrombolysis.

• Bovine blood was used to form a thrombosis for the experiment.

• Utilized a 3D printer to fabricate the nozzles with different geometric characteristics.

• Constructed an experimental setup based on Particle Image Velocimetry (PIV).

• Optimized the nozzle design by analyzing the pumping angle and distance.

• Constructed a conventional Schlieren visualization setup.

• Captured video of a gas lighter and a soldering iron.

• A Farneback algorithm was applied to extract the velocity profile from the video.

• Investigated the droplet impact phenomena on two immiscible layers of liquid.

• Conducted experiments by changing the dispensing height, droplet size, and oil film thickness.

• Developed a dual-interface model for accurately understanding droplet impact dynamics on a dual-layer liquid system.