Dr. Parisa MirbodClarkson University
Abstract: The rheology of particle-laden liquids and their interaction with a permeable medium are coupled, yet research into their interaction has bifurcated into two independent directions: suspension flows in geometries with smooth surfaces and flows of pure Newtonian fluids over permeable media. Future innovations require the derivation of experimentally validated models and theory, which designate their coupling behavior and allow exploration of the impact of parameters from both suspension and porous medium. In this seminar, I will present the steps made to comprehensively address the motion of suspension flows over permeable surfaces inspired by the almost frictionless movement of red blood cells through microvessles/capillaries. I will highlight two aspects of my group’s recent work that aim to understand the interrelation of flow and transport over porous surfaces in a Poiseuille flow system by: 1) analyzing the drag reduction of a suspension flows over a permeable surface and 2) understanding their instability over permeable media. I will introduce the very first continuum scale framework that accounts for the interplay of key parameters including the characteristics of the flow, the permeable media and the geometry of a channel on drag reduction. In the second part, I will characterize the flow-state boundary structure. We showed that for certain parameter ranges the neutral curves are no longer bimodal, i.e., the two modes of the instability corresponding to the free-flow and porous layers are not distinct. The experimental analysis to validate the models and to understand the detailed analysis of the flow over and at the interface of various specific porous media using the pressure drop measurements and PIV (particle image velocimetry) technique will be also reviewed. At the end, I will present how we can also examine mass transport between the fetus and mother in the placenta.
Parisa Mirbod is an Assistant Professor in the Mechanical and Aeronautical Engineering at Clarkson University. She has received her PhD degree from City University of New York-Graduate Center with honor and she was a Postdoctoral Research Associate at Benjamin Levitch Institute. She has built her career on deriving innovative theoretical/computational, and experimental methods for complex fluids, and flow over permeable surfaces. She received the 2016 I@UNITO Faculty fellowship from University of Turin. She is a recipient of the 2016 IFPA-New investigator NIH award and also a recipient of the 2014 NASA Glenn Faculty Fellowship. She looks forward to stimulating technical discussions during the seminar visit.
Host: Dr. Kenneth Brezinsky
For more information, please contact Prof. Kenneth Brezinsky at email@example.com.