报告题目：Dynamic Behaviors of Molten Insulation and Flame on Electrical Wire under Electric Field

报告人：Jeong Park 教授 (韩国釜庆大学)

报告地点：创新港校区敏行楼1-4056

报告时间：2026年1月13日（周二），10:00-11:30

腾讯会议：568-220-589

邀请人：汤成龙 教授

报告摘要：The issue of electrical wire fires caused by arcing or overheating presents critical safety hazards in both terrestrial power systems and microgravity environments like the International Space Station. This study investigates the dynamics of molten polyethylene insulation and flame spread under AC and DC electric fields. Results indicate that Electrohydrodynamic (EHD) forces—including electrostatic, dielectrophoretic, and electric pressure forces—govern the behavior of the molten polymer, significantly outweighing gravity and surface tension. Unique phenomena such as fuel-vapor jets and electrospray were observed. Furthermore, soot deposition was found to enhance electrostatic forces and locally reduce surface tension, accelerating droplet dripping and lateral flame spread. The findings conclude that flame spread is driven by EHD forces rather than simple thermal balance, suggesting that current safety codes must be revised to account for electric field effects.

报告人简介：Dr. Jeong Park holds a Bachelor degree from Seoul National University (SNU) in 1987 and a Master and a Ph.D from Korea Advanced Institute of Science and Technology (KAIST) in 1990 and 1995. He worked as a guest researcher at Tohoku University (1997-1998) and a guest scientist at NIST (2004-2005). He was the president of Korean Society of Combustion as well as the Chair of Korean Section of The Combustion Institute(2020-2021). He served on the associate editor of Journal of Mechanical Science and Technology (2013-2019) , He also served on the colloquium co-chair of 38th, 40th, and 41st International Symposia on Combustion and he has published over 100 papers in SCI Journals.