| 摘要 |
Acoustic waves, including surface acoustic waves, are useful to control fluids. In one aspect, acoustic waves may be applied to a fluid flowing in a channel to control or alter its flow characteristics, e.g., its flow rate or direction. Acoustic waves are typically applied using electrically-controlled acoustic wave generators, and thus, the flow of fluid can be controlled to a surprisingly high degree. If the fluid is caused to form a series of droplets, then acoustic waves may be used to control the volume of fluid in each droplet, to alter the rate droplets are formed, or the like. Acoustic waves may be used to deflect the flow of fluid in a channel, and in some cases, to cause fluid to flow to different locations. |
