Current Researches

1. Emulsions, microcapsules and microfluidics

Micro-emulsions or micro-capsules are of considerable importance due to their ability to protect and release control amounts of active ingredients in various areas such as food, drug and cosmetic industry, to act as surfactant molecules at water-oil interface, for chemical and biological sensing, bio imaging, magnetic particle imaging and as display materials on electronic papers. Our main objective in this research is to study behavior of emulsions under moderate and strong electric fields, electrohydrodynamic particle manipulation at emulsion interfaces and development of multi-purpose microfluidic device capable of fabricating multi-functional microcapsules.

2. Solid-liquid interfacial flow in medium and high Reynolds number flow

We are aiming for developing the friction minimized surface in the various flow condition. In first part, we will establish the physical definition of snow/ice surface and carry out quantitative research as the change of friction coefficient and the thickness of quasi ice/snow surface in environmental alteration. Based on it, we will investigate friction mechanism between snow/ice, surface and optimize micro structure and develop friction minimized system. On the other part, with the original technology from first half, we will optimize arrangement of micro structure on blade surface, and produce complete product after developing commercialized process of making micro structure.

3. Plant inspired fluidic device and actuator design

This proposes to develop the water transfer solution by nature-inspired technology utilizing the mimicry of the plant. The suggested new technology, the fusion of tree mimicry technologies and microfluidic control, micro patterning/manufacturing technology, multi phase flow and heat/mass transfer will be evaluated for the feasibility and sustainability of water pumping and actuating the system.

4. Hemodynamic interaction between blood flow and blood vessel

The wall shear stress (WSS) within the blood vessel is important factor related with vascular disease. High WSS may trigger endothelial cell cleavage, plaque rupture and high shear induced thrombosis. On the other hand, low WSS may induce atherosclerotic plaque formation and is therefore considered atherosclerosis prone. Therefore, prediction of WSS is important in vascular surgery, e.g. arteriovenous fistula (AVF). We visualize the flow field and predict WSS within blood vessel using numerical simulation with FSI model and hydraulic experiment with particle image velocimetry(PIV) method.