Laboratory of Microhydrodynamics and Flow in Porous Media

Research

The presence of free surface boundaries of complex liquids in microscale occur in many different situations, such as continuous coating process of a substrate, fluid displacement flows inside small passages and porous materials, flow of emulsions and complex dispersions and two-phase flows in microfluidics devices. That is the focus of our research.

Research on these aspects are challenging. The complex structure of the liquid may lead to non-linear behavior of the fluid when sheared or extended. Indeed, they can depart substantially from Newtonian behavior at the strain rates they suffer in these small-scale flows. The presence of the free boundaries (liquid/air and liquid/deformable solid interfaces) leads to strong non-linearities on the flow. The geometry of the flows is only a fraction of a millimeter (microscale) and capillary effects are usually very important in all the situations.

The different research projects are focused in four application areas: coating processes, microfluidics/microencapsulation, flow of complex liquids through porous media and emulsion formation and stability. We study these problems by both theory/numerical simulation and flow visualization.

Our research areas are list below:

The activities have been developed with collaboration and financial support from different industries in Brazil (Petrobras, 3M, Repsol-Sinopec Brasil, Equinor Brasil, Shell Brasil), USA (3M, Dow Chemicals) and Asia (Fuji Photo Film, Nippon Steel Corporation, Samsung); and from Brazilian government research funding agencies (CNPq, FINEP, ANP and FAPERJ).