FDTD analysis of electromagnetic fields caused by sparks between charged metals

✍ Scribed by Osamu Fujiwara; Kei Kawaguchi

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 218 KB
• Volume: 83
• Category: Article
• ISSN: 8756-663X
• DOI: 10.1002/(sici)1520-6432(200002)83:2<44::aid-ecjb6>3.0.co;2-7

✦ Synopsis

It is not known what kind of influence metallic bodies exert on the transient electromagnetic field generated by a spark discharge between charged metals. In this article, the electromagnetic fields generated by spark discharges between metallic spheres are numerically analyzed by the finite-difference time-domain (FDTD) method. It is found that the presence of the metallic bodies can increase the field level depending on their size. Next, the condition for maintaining the metallic spherical surfaces at a constant potential is created by an image charge pair. The generated magnetic field is derived by superposing the electromagnetic fields by the dipole models with the same charge pair. The numerical results almost entirely agree with those obtained by the FDTD method. The validity of the FDTD findings is confirmed.