TIRM-RIM Technique for Drop Impact

Integrating total internal reflection and reflection interference microscopy, air film and post-rupture contact dynamics upon drop impact are directly visualized with nanometer resolution.

Thin Film Evaporation on Structured Surfaces

Meniscus shape of thin film evaporation on structured surfaces is directly observed using interferometry inside an environmental chamber with controlled temperature, humidity, and pressure.

Evaporation and Deposition of Inkjet-Printed Drops

Integrating high-speed interferometry, fluorescence microscopy, and PIV algorithm, evaporation, microflows, and particulate deposition of inkjet-printed colloidal drops are observed.

Wicking in Hierarchical Surfaces

The importance of micropatterns on wicking enhancement in hierarchical surfaces is demonstrated using ZnO nanorods grown on silicon micropillars of varying spacings and heights.

About Our Lab

The Complex Fluids and Multiphase Transport Lab conducts both experimental and modeling studies on heat and mass transfer, multi-phase flows, and interfacial transport phenomena in additive manufacturing and energy systems. Current projects range from basic studies of interfacial transport in directed-assembly of functional materials and nanostructure-enhanced two-phase heat transfer to design of innovative dry cooling solutions for power plants and electrochemical energy storage systems.

The laboratory is supported by the National Science Foundation, Department of Energy, Advanced Research Projects Agency–Energy, Air Force Office of Scientific Research, Electric Power Research Institute, Ben Franklin Technology Partners, American Chemical Society, PA Dept. Community & Economic Development, and industry.

EPCM heat exchanger for indirect dry cooling of power plants

Thermal management systems for electric power plants account for ~40% of total fresh water withdrawals in the US. Due to dwindling access to fresh water resources worldwide, continued operation of these systems poses a significant engineering challenge. We use highly porous heat exchanger based on encapsulated phase change materials (EPCM) to effectively cool hot water exiting the surface condenser with reduced pressure drop and system cost as compared to current air-cooled condensers.

Highlights

Postdoc Openings!

Congratulations to Dr. Sun for her promotion to Full Professor!
May 2019

Congratulations to Dr. Min Pack on his new Assistant Professor position at Baylor University!
April 2019

Congratulations to Dr. Han Hu on his new Assistant Professor position at University of Arkansas!
March 2019

Congratulations to Dr. Swanand Bhagwat on his new endeavor at Southwest Research Institute!
October 2018

Our lab received a new NSF Award to study Li-air batteries.
July 2018