19-22 October 2011
Hotel Roanoke, Roanoke VA
US/Eastern timezone
<font color=red><b>To upload your file, log in (@ top right), then click on your talk title, then click "Add Material" at the bottom of the page.</b></font>

Drop Formation from a Wettable Nozzle

21 Oct 2011, 12:09
Crystal Ballroom B (Hotel Roanoke, Roanoke VA)

Crystal Ballroom B

Hotel Roanoke, Roanoke VA


Brian Chang (Virginia Tech)


Drop formation from a nozzle is a common occurrence in our daily lives. It is essential in ink-jet printers and spray cooling technology. However, most research has already been done on the pinch-off mechanism from a non-wettable nozzle. In this study, we focus on the formation of a drop from a wettable nozzle. Initially, a drop will climb the outer walls of the wettable nozzle because of surface tension. This initial upward motion is closely related to the capillary rise phenomenon. Then, when the weight of the drop becomes large enough, the force of gravity would overcome surface tension causing the drop to fall. By changing the nozzle size and fluid flow rate, we have observed different behaviors of the droplets and developed a mathematical model that predicts the motion of the drop. Two asymptotic solutions in the initial and later stages of drop formation are then obtained and show good agreement with the experimental observations.


Gary Nave (Virginia Tech) Sunghwan Jung (Virginia Tech)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now