[PO-H2] Poster Session 2

[P2-66] Shape Deformation and Mechanical Relationship of Ionic Droplet Under An Electric Field

Bo-Yu Shih¹, ^○Wei-Chun Lin¹, Alice Hu², Hsuan-Teh Hu¹, Yu-Chieh Lo³ (1.Department of Civil Engineering,National Cheng Kung University, Taiwan, 2.Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, 3.Department of Materials Science and Engineering, National Chiao Tung University, Taiwan)

Nano-sized symmetric double Taylor cone forms a capillary liquid bridge while electric field applied on Ionic liquids (2-dimethyl-3-propylimidazolium- bis(trifluoromethylsulphonyl)imide). This ionic liquid bridge size is around 20 nm. We attempt to understand the critical dimensions and stability criteria for nano-bridge forming mechanism. Therefore, we conduct molecular dynamics simulation under electric field to investigate ionic droplets electrohydrodynamic behavior with different structures and potential functions. Factors that affect liquid bridge size through extensive parameter are studied thoroughly in this work. We also investigate the influence of changing velocity field and shape deformation under different electric field conditions. The mechanical relationship between electric stress, Coulomb electrostatic force and the intermolecular interactions are analyzed. Through this complete studies, surface tension coefficient and ionic liquid viscosity are obtained. Results show that shape deformation and size of liquid bridge are mainly controlled by surface tension coefficient and viscosity.