The choice of a high speed camera for imaging high speed two-phase air water flow should depend on the following:

1. Length scale of the intended area to be imaged

2. Velocities of the flow

3. Source of illumination

The important parameters one should consider when selecting high speed cameras are:

1. Frame rate range - This relates to the velocity scales in your experiments

2. Variability of shutter speeds - This can help with the illumination level required for imaging at high speeds

3. Resolution - This will help determine the smallest length scale you can reliably study with your camera

In addition, factors such as requirement of the color optical sensor, refresh rates of the sensor, on camera storage, mode of connectivity of the camera to PC (Gigabyte ethernet or firewire -  this effects how fast you can download the data from the memory of the camera to the computer) and the software that comes along with the camera are equally important. We have used a ultra high speed camera in our study of two phase air-water flow in microchannels and nucleate boiling. You can find the details in the attached paper. 

Article Adiabatic Air-Water Two-Phase Flow in Circular Microchannels