Two-Phase Fluid Separation in Microscale-Based H-S Cell; Experiment and Modeling

Two-Phase Fluid Separation in Microscale-Based H-S Cell;

Experiment and Modeling

 

Frederick Atadana¹, Ray Wheeler² and Goran Jovanovic¹

 

¹Oregon State University, Microproducts Breakthrough Institute, Corvallis, Oregon

²Umpqua Research Co.; Myrtle Creek, Oregon

 

In this work a novel design of the Hele-Shaw cell in the form of micropost lamina was used to achieve efficient and low cost separation of immiscible fluids. The device makes use of capillary pressure gradient, which is the source of driving force, for separation of two-phase fluid systems in micro scale structures. This novel approach is most applicable for separation of discrete bubbles/droplets from continuous fluid phase. The capillary pressure can be manipulated by the geometric design of device, changing the surface wetting properties of the device, and establishment of a temperature gradient. The device was tested on separation of water and oil, and water and air. Numerical simulation and preliminary experimental results of 50% aqueous and 50% air by volume, showed successful separation of the two phases. The application was extended to liquid-liquid extraction of shikimic using organic solvent from an aqueous solution. The results showed significant extraction of shikimic acid from aqueous solution.