Energy Dissipations in Soap Films under External Fields

• Main Authors: Bo-min Tu, 凃博閔
• Other Authors: Peilong Chen
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/04658046945075966473

碩士 === 國立中央大學 === 物理研究所 === 92 === Several kinds of flows in the soap film is created by different electromagnetic forcing and measured by particle tracking. In circle flow the velocity of air is described well by Navier-Stokes equation with only azimuthal velocity component. Using the equation and double films experiment, the velocity in soap film and air are measured. Besides, film's thickness is measured by resonance method. The ratio of energy dissipation rate in air and soap film is found. The important factors of the effect rate are "injection scale" and "frequency response". Comparison of these rates demonstrates that the air friction is a significant energy dissipation mechanism in the system.