Mechanical & Materials Engineering, Department of


First Advisor

Sangjin Ryu

Date of this Version

Winter 11-30-2018


A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Master of Science, Major: Mechanical Engineering and Applied Mechanics, Under the supervision of Professor Sangjin Ryu. Lincoln, Nebraska: November, 2018

Copyright (c) 2018 Haipeng Zhang


Inspired by crossflow membrane droplet generation and microfluidic droplet generation, I propose an easy method to generate monodisperse drops using cross-flow caused by rigid body rotation. In this approach, a dispersed phase (DP) liquid was injected through a stationary vertical needle into an immiscible continuous phase (CP) liquid which was in rigid body rotation. A DP drop growing at the end of the needle experienced fluid dynamic forces from the horizontal CP flow, and it was detached from the needle when it had grown to a certain size. This study investigated the relationship between the resultant size of drops and the controllable experimental factors including the flow velocity of the CP at the needle end and the flow rate of the DP through the needle.

Advisor: Sangjin Ryu