Levich Institute Seminar Announcement, 04/12/2016
Steinman Hall, Room #312
(Chemical Engineering Conference Room)
Professor Arun Ramchandran
University of Toronto
Department of Chemical Engineering and Applied Chemistry
"Macrotransport Processes in the Pressure-Driven Flow of a Concentrated, Non-Colloidal Suspension"
In this talk, I will discuss two examples of macrotransport analysis performed on the low Reynolds number, pressure-driven flow of a concentrated, non-Brownian suspension of rigid, spherical particles. The first part of the talk will consider Taylor dispersion of a solute being carried in the suspending fluid of a concentrated suspension, and explain how the inclusion of particles modifies the dispersion process. The results will guide the design of conduit geometries and flow conditions that minimize or enhance axial solute dispersion and mixing in suspension flows through microfluidic geometries. In the second part of the talk, I will present the macrotransport equations that describe the evolution of the cross-section-averaged volume fraction of particles in tube and Hele-Shaw flow of concentrated suspensions. When compared to the full 3-D equations, these simplified equations represent a tremendous saving of computational cost in the determination of volume fraction distributions. Various physical features elucidated by the macrotransport equations, such as self-sharpening of volume fraction gradients and viscous fingering, will be elucidated.
BRIEF ACADEMIC/EMPLOYMENT HISTORY
RECENT RESEARCH INTERESTS
Suspension and emulsion flows, coalescence and breakup in emulsions, polymers under confinement, vesicle dynamics, oil sands extraction