Integration of microfluidic systems with external fields for multiphase process intensification

Abstract

Multiphase flows are widely used in process industries. How to enhance the mass and energy transfer of multiphase flow systems thus improving mixing, reaction, separation, remains an extensive topic. In this context, microfluidic systems have attracted significant interest because of their enhanced transfer rates, improved process safety, ease of scale-up, etc. To further intensify the microfluidic systems, integration with external fields becomes an attractive strategy. This review presents a state-of-art review of the integration of microfluidic systems with external fields, i.e. microwave, ultrasound, magnetic and electric fields, for multiphase process intensification. The review starts with a brief introduction of multiphase systems, process intensification and microfluidic systems, followed by four sections focusing on each of the fields. Intensification mechanisms of these different fields and their applications in various multiphase processes are discussed. This review provides a useful guideline for using external fields to realize the multiphase process intensification in microfluidic systems.