title: Negative Pressure Induced Droplet Generation in a Microfluidic Flow-Focusing Device.
abstract: We introduce an effective method to actively induce droplet generation using negative pressure. Droplets can be generated on demand using a series of periodic negative pressure pulses. Fluidic network models were developed using the analogy to electric networks to relate the pressure conditions for different flow regimes. Experimental results show that the droplet volume is correlated to the pressure ratio with a power law of 1.3. Using a pulsed negative pressure at the outlet, we are able to produce droplets in demand and with a volume proportional to the pulse width.
authors.affiliation: Queensland Micro- and Nanotechnology Centre, Griffith University , 170 Kessels Road QLD 4111, Brisbane, Australia.|School of Mechanical and Aerospace Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore (639798).
authors.forename: Adrian J T
authors.initials: AJT
authors.lastname: Teo
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore (639798).
authors.forename: King-Ho Holden
authors.initials: KH
authors.lastname: Li
authors.affiliation: Queensland Micro- and Nanotechnology Centre, Griffith University , 170 Kessels Road QLD 4111, Brisbane, Australia.
authors.forename: Nam-Trung
authors.initials: NT
authors.lastname: Nguyen
authors.affiliation: Queensland Micro- and Nanotechnology Centre, Griffith University , 170 Kessels Road QLD 4111, Brisbane, Australia.|School of Aeronautics, Northwestern Polytechnical University , 127 West Youyi Rd, Xi'an, Shaanxi China.
authors.forename: Wei
authors.initials: W
authors.lastname: Guo
authors.affiliation: Queensland Micro- and Nanotechnology Centre, Griffith University , 170 Kessels Road QLD 4111, Brisbane, Australia.|Institute of Cognitive Science, University of Osnabrück , 49069 Osnabrück, Germany.
authors.forename: Nadine
authors.initials: N
authors.lastname: Heere
authors.affiliation: School of Aeronautics, Northwestern Polytechnical University , 127 West Youyi Rd, Xi'an, Shaanxi China.
authors.forename: Heng-Dong
authors.initials: HD
authors.lastname: Xi
authors.affiliation: Department of Mechanical Engineering, National Central University , No. 300, Zhongda Road, Taoyuan, Taiwan.
authors.forename: Chia-Wen
authors.initials: CW
authors.lastname: Tsao
authors.affiliation: School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong , Wollongong, NSW 2522, Australia.
authors.forename: Weihua
authors.initials: W
authors.lastname: Li
authors.affiliation: Queensland Micro- and Nanotechnology Centre, Griffith University , 170 Kessels Road QLD 4111, Brisbane, Australia.
authors.forename: Say Hwa
authors.identifier: 0000-0002-9764-7868
authors.initials: SH
authors.lastname: Tan