Polymeric Fluid Flow Over Superhydrophobic Surfaces

Superhydrophobic (SHP) surfaces have exceptionally low surface energies and distinct surface roughnesses that create a vapor layer between the fluid and the surface, resulting in high levels of drag reduction and improved flow of fluids. Most previous work involving these surfaces have utilized simple liquids (e.g. water) and focused on characterization of the quiescent interface and on drag reduction or slip modifications of fluid flow. This study attempts to utilize SHP surfaces to improve the flow behavior of more complex multi-component fluids, such as polymer solutions. By merging the research fields of SHP surfaces and polymer fluids, we investigate the potential to enhance slip and drag reduction effects as a result of surface interactions.  Interfacial rheometry and microfluidics systems are used to evaluate slip length, friction, and fluid flow.