微小气泡远场散射模型的仿真与分析(英文)

Numerical simulation and analysis on far-field scatter for micro-bubbles

利用商用电磁场计算软件CST仿真了线偏振光经过气泡散射后散射强度分布以及其退偏效应的变化,分析了气泡的远场散射理论,并利用频率为563THz(波长为532nm)的激光为入射光,在基于时域有限积分法(FDID)的基础上分析了远场散射的影响因素。仿真结果表明:这种新的仿真方法可以精确地分析和反映前向与后向散射的光强分布,以及退偏特性分布,并且这些分布特性会随气泡半径大小、散射角、水体的吸收系数的变化而变化。此结论为后续的研究提供了重要依据。

The depolarization effect and scattering strength were simulated by CST, and far-filed scattering theory also was analyzed, linearly polarized light at the frequency of 563 THz （wavelength 532 nm, green light） was taken as the probe light. The far-field scattering filed performance of influencing factors were analyzed based on the method of finite integral of CST. Simulation result shows this new model can accurately analyze and reflect forward and backward scattering, all directions of the scattering strength and depolarization characteristics can be got in figures, these characters also affected by the bubble radius, scatter angle and water absorption coefficient. These results provides important basis for subsequent research.