If we have a micro-droplet moving in air. The droplet is a result of a liquid break-up from a spray penetration. The spray induces air. The droplets decelerate due to friction with air (drag forces). However, the air itself decelerates as well with the declaration of the cloud of droplets. There is no technique, yet, to measure the velocity of air surrounding individual droplets. Is there any up-to-date method to determine this velocity? However, I have the measurement of the velocity of droplet, which is tracked with its Sauter Mean Diameter (SMD).
This link can be helpful http://www.dtic.mil/dtic/tr/fulltext/u2/a801123.pdf
Hello,
experioments have been made to measure droplet and surrounding air velocities, although not at an individual scale. But zooming and adapting the optical array could allow that. See for instance,
L Le Moyne, P Guibert, R Roy, B Jeanne (2007) Fluorescent-PIV Spray/Air interaction analysis of high-pressure gasoline injector In: International conference on fuel and lubricants SAE - kyoto 23-29/07/2007 Edited by:SAE - IMechE - JSAE. SAE - IMechE - JSAE.
hope it is helpfull
