Paper Number
GR9 

Session
Gallery of Rheology Contest

Title
Flow-structure diptych

Presentation Date and Time
October 23, 2019 (Wednesday) 6:30

Track / Room
Gallery of Rheology / Main Lobby on 3rd floor

Authors (Click on name to view author profile)

  1. Corona, Patrick T. (University of California, Santa Barbara, Chemical Engineering)
  2. Berke, Barbara (Chalmers University of Technology, Department of Physics)
  3. Guizar-Sicairos, Manuel (Paul Scherrer Institut, Swiss Light Source)
  4. Liebi, Marianne (Chalmers University of Technology, Department of Physics)
  5. Leal, L. Gary (University of California, Santa Barbara, Chemical Engineering)
  6. Helgeson, Matthew E. (University of California, Santa Barbara, Chemical Engineering)

Author and Affiliation Lines (in printed abstract book)
Patrick T. Corona1, Barbara Berke2, Manuel Guizar-Sicairos3, Marianne Liebi2, L. Gary Leal1, and Matthew E. Helgeson1
1Chemical Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106; 2Department of Physics, Chalmers University of Technology, Gothenburg, Sweden; 3Swiss Light Source, Paul Scherrer Institut, Villigen PSI, Switzerland

Speaker / Presenter 
Corona, Patrick T.

Text of Abstract
Material properties of complex fluids are greatly influenced by the flow histories under which they are processed. In this work, we present a Warhol-inspired view into the structure evolution of suspensions of rigid nanoparticles in complex variations of flow type and strength. We employ a fluidic four-roll mill (FFoRM) to generate tunable flows that, when combined with scanning-SAXS measurements, enables the measurement of fluid microstructure under complex flow histories. In one representation, optically-measured streaklines trace the trajectory of fluid elements through such deformation histories; whereas, in another, pixel color and intensity indicate of the orientation and pair alignment, respectively, of the rodlike nanoparticles measured with scanning-SAXS as they move along the flow. Each scanning-SAXS measurement represents more than 2500 discrete measurements of fluid nanostructure in a unique set of flow histories. Varying the flows into the device creates new flow histories for the fluid to navigate, resulting in changes to the evolving suspension nanostructure.