用comsol计算2D声子晶体带隙的案例，步骤详细适合初学者。(2D calculations using COMSOL phononic crystal band gap, step by step, suitable for beginners.)

一维亥姆霍兹线圈仿真，绕线区域由矩形生成，即长方体，更好的模拟了多匝线圈的情况。开发平台为comsol5.2(One dimensional Helmholtz coil simulation, the winding area is generated by rectangle, namely cuboid, better simulation of multi turn coil. The development platform is comsol5.2)

通过comsol软件，仿真得到平板电容之间的电场分布(The electric field distribution between plate capacitors is simulated by COMSOL software.)