title: Measurement and control of pressure driven flows in microfluidic devices using an optofluidic flow sensor.
abstract: Measurement and control of pressure-driven flow (PDF) has a great potential to enhance the performance of chemical and biological experiments in Lab on a Chip technology. In this paper, we present an optofluidic flow sensor for real-time measurement and control of PDF. The optofluidic flow sensor consists of an on-chip micro Venturi and two optical Fabry-Pérot (FP) interferometers. Flow rate was measured from the fringe shift of FP interferometers resulted from movement fluid in the on-chip micro Venturi. The experimental results show that the optofluidic flow sensor has a minimum detectable flow change of 5 nl/min that is suitable for real time monitoring and control of fluids in many chemical and biological experiments. A Finite Element Method is used to solve the three dimensional (3D) Navier-Stokes and continuity equations to validate the experimental results.
authors.forename: Mohammad Sadegh
authors.initials: MS
authors.lastname: Cheri
authors.affiliation: Laser and Plasma Institute, Shahid Beheshti University , 1983963113 Tehran, Iran.
authors.forename: Hamidreza
authors.initials: H
authors.lastname: Shahraki
authors.affiliation: Laser and Plasma Institute, Shahid Beheshti University , 1983963113 Tehran, Iran.
authors.forename: Jalal
authors.initials: J
authors.lastname: Sadeghi
authors.affiliation: Laser and Plasma Institute, Shahid Beheshti University , 1983963113 Tehran, Iran.
authors.forename: Mohammadreza Salehi
authors.initials: MS
authors.lastname: Moghaddam
authors.forename: Hamid
authors.initials: H
authors.lastname: Latifi